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Cockroaches (Blattodea) Of Southern Louisiana: Morphology, Diversity, And Life Histories, Forest Brady Huval Jan 2016

Cockroaches (Blattodea) Of Southern Louisiana: Morphology, Diversity, And Life Histories, Forest Brady Huval

LSU Master's Theses

The state of Louisiana has both temperate and subtropical climates and includes six ecoregions. Two ecoregions in south-central Louisiana were surveyed for members of the order Blattodea to better describe the diversity, life histories, and taxonomy of adult and nymphal cockroaches. Blattodea, excluding the newly included epifamily Termitoidae, is an understudied order of insects in spite of the importance species that are infamous peridomestic pest. The order Blattodea currently contains 9 families comprising of 460 genera. There are approximately 7570 described species 4641 of which are cockroaches and 2929 are termites. Complete information on life histories lacks for the majority …

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The Effect Of Artificial Light On The Community Structure And Distribution Of Reef-Associated Fishes At Oil And Gas Platforms In The Northern Gulf Of Mexico, Victoria Anne Barker Jan 2016

The Effect Of Artificial Light On The Community Structure And Distribution Of Reef-Associated Fishes At Oil And Gas Platforms In The Northern Gulf Of Mexico, Victoria Anne Barker

LSU Master's Theses

The northern Gulf of Mexico (GOM) contains approximately 2,500 oil and gas platforms, resulting in one of the largest de facto artificial reef systems in the world. As of 2013, 1,227 additional structures had ceased to produce oil and gas and have been decommissioned and removed. While active platforms are lit by high-pressure mercury vapor lights, inactive platforms are only minimally lit for navigation. The positively phototaxic behavior of many fish species causes lit oil platforms to act as fish attraction devices, especially at night. Though a variety of fish species have been reported near these structures, changes in fish …

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Effect Of Bitterness Blockers In Partial And Complete Replacement Of Sodium Chloride With Potassium Chloride On The Physicochemical And Sensory Characteristics Of Marinated Chicken Breast Fillets, Ana Gabriela Ocampo Arriaga Jan 2016

Effect Of Bitterness Blockers In Partial And Complete Replacement Of Sodium Chloride With Potassium Chloride On The Physicochemical And Sensory Characteristics Of Marinated Chicken Breast Fillets, Ana Gabriela Ocampo Arriaga

LSU Master's Theses

High sodium intake has negative health implications on hypertension and cardiovascular diseases. Brines used in chicken marination are composed of salt (NaCl), phosphates and seasonings. Potassium chloride (KCl) is the most common sodium replacer but its use is typically limited to less than 50% substitution due to its undesirable bitterness and metallic aftertaste. The objective of this study was to determine the effect of 5’ adenosine monophosphate (AMP) and glycine, as bitterness blockers, on physicochemical, sensory characteristics and purchase intent of sodium reduced chicken breast fillets. Chicken breast was injected with a 20% pick-up solution. Salt treatments (trts) were 50, …

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Evaluation Of Alkaline- And Fungal-Assisted Wet Storage Of Energycane Bagasse, Jing Cao Jan 2016

Evaluation Of Alkaline- And Fungal-Assisted Wet Storage Of Energycane Bagasse, Jing Cao

LSU Master's Theses

Lignocellulosic biomass is a promising renewable resource for the production of biofuels and biochemicals. Energycane is considered a lignocellulosic biomass characterized by its high fiber content and cold tolerance. It can be planted on marginal land and does not need to compete with the food supply. Wet storage in combination with sodium hydroxide (NaOH) or white-rot fungi was applied to energycane bagasse to preserve the lignocellulosic polymeric sugars (cellulose and hemicellulose) during short-term storage (60 days) and to make them accessible for conversion into biofuels and biochemicals. Alkaline-assisted wet storage was successful in preserving the biomass by minimizing microbial degradation, …

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Metric Variation In The Human Sacrum: Costal Process Length Among Black And White South Africans, Christy Rose Wayne Jan 2016

Metric Variation In The Human Sacrum: Costal Process Length Among Black And White South Africans, Christy Rose Wayne

LSU Master's Theses

Considerable attention has been given to the measureable differences that exist between different human populations in the size and shape of the pelvis, with Africans having a narrower pelvis than Europeans. By collecting data on sacral breadth from a South African skeletal population, this study (1) tests the hypothesis that African blacks possess a narrower sacrum, and by inference pelvis, than whites and (2) considers whether the size variation between blacks and whites is due to nutritional, historical and social differences, to a genetic basis related to climatic adaptation, or to both. White South Africans were found to possess a …

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Health Benefit Statements Affect Consumer Liking, Emotions, And Purchase Intent: A Case Of Gluten-Free, Sugar Reduced Banana Muffins, Amber Renee Jack Jan 2016

Health Benefit Statements Affect Consumer Liking, Emotions, And Purchase Intent: A Case Of Gluten-Free, Sugar Reduced Banana Muffins, Amber Renee Jack

LSU Master's Theses

Product information given to consumers can be used to improve food choices; however, consumers may respond differently depending on the given information. Nutritional information can serve as an instrument to positively influence healthier food choices and purchase intent. The market for gluten-free products reached $5.5 billion in 2015; however, there is a need for development of acceptable gluten-free and sugar-free products driven by consumers who are nowadays more health conscious. Muffin, a high calorie baked-good product, is very popular among consumers and known for its pleasant aroma and sweet taste qualities. There are a number of commercial gluten-free muffin products, …

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Testing Fitness-Related Phone Application Technology In Physical Activity Classes, Angela Nicole Simonton Jan 2016

Testing Fitness-Related Phone Application Technology In Physical Activity Classes, Angela Nicole Simonton

LSU Master's Theses

Many young adults are inactive (Centers for Disease Control and Prevention, 2010) and time spent on smartphones and applications (“apps”) is high (Pew Research Center, 2014; The Nielsen Company, 2014). Technology is often viewed as a barrier to health behavior, so seeking ways of using technology to facilitate physical activity (PA) and other health-related behaviors could be beneficial. The Social Cognitive Theory (SCT) framework was used to determine if the NexTrack smartphone app could increase PA behaviors and SCT-related constructs among university students in PA courses. Participants in the NexTrack app intervention group were hypothesized to report increased psychosocial and …

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Comparison Of Domestic Fresh And Frozen And Imported Frozen Goat Meat, Jeffrey Cole Denis Gregorie Jan 2016

Comparison Of Domestic Fresh And Frozen And Imported Frozen Goat Meat, Jeffrey Cole Denis Gregorie

LSU Master's Theses

The objective of this research was to determine differences in carcass evaluation, yield, and meat quality from representative fresh domestic (FSD), frozen domestic (FZD), and frozen imported Australian (FIA) goat carcass sides (n=30 from each source). The U.S. carcasses were split into sides and the right side frozen and stored for 6 weeks. Left sides were fabricated into standardized primal cuts. After frozen storage, right sides and FIA carcasses were thawed for 3 days at 4°C. Three experiments were conducted on the carcass traits and meat yields, quality differences in leg cut, and differences in loin and racks across freezing …

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Essays On The Externalities Of The Mahatma Gandhi National Rural Employment Guarantee Act Of India, Satadru Das Jan 2016

Essays On The Externalities Of The Mahatma Gandhi National Rural Employment Guarantee Act Of India, Satadru Das

LSU Doctoral Dissertations

In this dissertation, I offer two distinct studies on the welfare externalities of the Mahatma Gandhi National Rural Employment Guarantee Act (MGNREGA) of India. The MGNREGA is an employment guarantee scheme implemented in rural India since 2006 and is the world’s largest public works project. In the first study, I look at the effects of the MGNREGA on crime in India. I use crime statistics from National Crime Records Bureau of India to create a district level panel between 2002 and 2012 to estimate the effects of the program on various violent and property crimes. I also create a district …

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Phylogeography Of Oculina Corals And Their Algal Symbionts: Insights Into The Origin And Expansion Of Oculina Patagonica In The Mediterranean, Karine Eliane Posbic Leydet Jan 2016

Phylogeography Of Oculina Corals And Their Algal Symbionts: Insights Into The Origin And Expansion Of Oculina Patagonica In The Mediterranean, Karine Eliane Posbic Leydet

LSU Doctoral Dissertations

In a world of rapidly changing environmental conditions, species must effectively respond to their changing habitat or risk extinction. The goal of my dissertation is to elucidate the origins and mechanisms underlying the recent successful population expansion of the invasive coral Oculina patagonica in the Mediterranean Sea. To do this, I have utilized nuclear markers and next-generation sequencing data for the coral host and its algal symbiont as well as environmental data. Although only recently first described from the waters of the Mediterranean, genetic, historical demographic, and fossil evidence suggests that O. patagonica has not been anthropogenically introduced from the …

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Role Of An Adenylyl Cyclase Isoform In Alcohol's Effect On Cyclic Amp Regulated Gene Expression In Mammalian Cells, Rebecca Ann Hill Jan 2016

Role Of An Adenylyl Cyclase Isoform In Alcohol's Effect On Cyclic Amp Regulated Gene Expression In Mammalian Cells, Rebecca Ann Hill

LSU Doctoral Dissertations

Research suggests that the cyclic AMP (cAMP) signaling pathway including CREB-CRE regulated expression of various genes is implicated in the predisposition to and development of alcoholism in humans. Alcohol also induces changes in inflammatory and immune responses; these changes increase the incidence of pneumonias and other infections, which can negatively affect recovery from infections. Cyclic AMP (cAMP) is known for its immunosuppressive effects and is also required for proper development of the immune system. Previous work in our laboratory has demonstrated that ethanol enhances the activity of adenylyl cyclase (AC) in an isoform-specific manner; type 7 AC (AC7) is most …

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Neural Recovery Rates Of Knee Extensors Following A Resistance Exercise Protocol, Darren Michael Polk Jan 2016

Neural Recovery Rates Of Knee Extensors Following A Resistance Exercise Protocol, Darren Michael Polk

LSU Master's Theses

Fatigue can manifest in the human body in a multitude of ways, one of these is neural-based fatigue. Neural-based fatigue occurs when the nerve fails to activate a muscle (Brooks et al., 2005). The purpose of this research is to investigate rates of neural recovery following a resistance exercise protocol. A pre-test consisting of a 5-second maximum voluntary isometric knee extension was performed. Next, each subject performed a resistance exercise protocol consisting of 5 sets of 10 repetitions of isokinetic knee extensions. Post-tests following the resistance exercise protocol consisted of 5-second maximum voluntary isometric knee extensions after 1, 5, 10, …

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Effects Of Calf Starter Composition And Mixing Method On Growth And Rumen Health In Young Dairy Calves, Ruth Marisol Orellana Rivas Jan 2016

Effects Of Calf Starter Composition And Mixing Method On Growth And Rumen Health In Young Dairy Calves, Ruth Marisol Orellana Rivas

LSU Master's Theses

Twenty-four male Holstein calves (BW = 38.78 ± 7.26 Kg) were used to evaluate the effects of commercially available or farm mixed starter on animal performance, blood metabolites, and rumen health. Calves were randomly assigned to one of two treatments which included: commercial calf starter (minimum 20% CP; CCS) and starter of similar nutrient content but hand mixed on farm (FMS). Calves were offered treatments ad libitum on days 4 through 84. Milk replacer (MR) was offered beginning on day 4. On day 42, MR was reduced to once daily to decrease intake by 50%. On day 49 calves were …

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Dietary Plant Lectins May Be An ‘Unknown Etiology’ In Parkinson’S Disease And Dietary Bioactive Compounds Affect Lifespan And Fat Storage Aspects Of Caenorhabditis Elegans, Mingming Wang Jan 2016

Dietary Plant Lectins May Be An ‘Unknown Etiology’ In Parkinson’S Disease And Dietary Bioactive Compounds Affect Lifespan And Fat Storage Aspects Of Caenorhabditis Elegans, Mingming Wang

LSU Doctoral Dissertations

Dietary bioactive compounds benefit health while some might induce pathological processes. Parkinson’s disease (PD) is the second most common neurodegenerative disease. Braak and Hawkes hypothesized that the gastrointestinal tract may be a potential site of neuronal invasion by an “unknown pathogen” leading to some Parkinsonism. Neurotoxin botulinum or ricin can trans-synaptically transport in nervous system. Our hypothesis 1: dietary plant lectins might be responsible for the “unknown pathogen” causing PD. Pomegranate juice (PJ) have antioxidant and anti-obesity effects. Our hypothesis 2: PJ increases lifespan in C. elegans and reduces fat storage. Study 1: Post-feeding rhodamine or TRITC tagged dietary lectins …

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A Mixed Methods Case Study Exploring Simulation And Caring In Nursing Education, Carla Armstead Harmon Jan 2016

A Mixed Methods Case Study Exploring Simulation And Caring In Nursing Education, Carla Armstead Harmon

LSU Doctoral Dissertations

Current research in nursing education suggests a shift from traditional didactic transmission methods to student-centered pedagogies to prepare nursing students with substantive knowledge necessary for competent practice in a complex healthcare environment. Simulation has emerged as a pedagogy that offers students the opportunity to critically think, solve problems, and care for diverse patients in a nonthreatening, safe environment. As the use of simulation increases, a concern is whether or not it can hinder the development of caring behaviors necessary for competent and compassionate nursing practice. This research was a study of nursing students’ descriptions of the simulation experience, and perceptions …

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Persistent Rna Viruses Of Common Bean (Phaseolus Vulgaris): Distribution And Interaction With The Host And Acute Plant Viruses, Surasak Khankhum Jan 2016

Persistent Rna Viruses Of Common Bean (Phaseolus Vulgaris): Distribution And Interaction With The Host And Acute Plant Viruses, Surasak Khankhum

LSU Doctoral Dissertations

Common bean (Phaseolus vulgaris) is the most important legume for direct human consumption. Common bean originated and was domesticated in the Americas but now is grown worldwide. As in the case of other crops, common bean can be infected with acute and persistent plant viruses. A modified dsRNA extraction method was developed and used in this study. The method was fast, economic, versatile, and required relatively small amounts of desiccated plant tissue. The method was successfully used to extract dsRNAs from plants infected with RNA plant viruses and to investigate the occurrence of two endornaviruses, Phaseolus vulgaris endornavirus 1 (PvEV1) …

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Modeling Relationships Among Affective Measures Of Food Choice: Acceptance, Emotions And Satisfaction, Wisdom Wardy Jan 2016

Modeling Relationships Among Affective Measures Of Food Choice: Acceptance, Emotions And Satisfaction, Wisdom Wardy

LSU Doctoral Dissertations

The importance of ascertaining holistic product and consumer understanding beyond liking in the product development process cannot be overstated. This research investigated the role of attribute performance on satisfaction in explaining the relationship between food-evoked emotions and sensory preferences, and examined factors influencing the sensory-emotion profile of food products. In the first phase of this research, a series of consumer studies were conducted using eggs as a test product. First, the extent to which critical product attributes contribute to the satisfaction of quality requirements and purchase intent was determined using Kano modeling concepts. The emotional profile of the product was …

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Extraction And Biochemical Characterization Of Alligator Mississippiensis Glycosaminoglycans And An Ex-Vivo Murine Pilot Study To Test Their Potential Effect On A Selected Panel Of Genes Associated With Cystic Fibrosis, Jose Daniel Estrada Andino Jan 2016

Extraction And Biochemical Characterization Of Alligator Mississippiensis Glycosaminoglycans And An Ex-Vivo Murine Pilot Study To Test Their Potential Effect On A Selected Panel Of Genes Associated With Cystic Fibrosis, Jose Daniel Estrada Andino

LSU Doctoral Dissertations

Cystic fibrosis (CF) is a genetic disorder with a median survival age of 40.7 years. Chronic airway inflammation and dehydration are critical features of CF. The size and structure-dependent hydration and anti-inflammatory properties of glycosaminoglycans (GAGs) such as hyaluronic acid (HA) may help ameliorate these symptoms. The GAGs contained in farmed Alligator mississippiensis by-products offer a potential to improve waste management practices and increase revenue in the alligator industry, through their development for use in biomedical applications. This study aimed to efficiently extract and characterize GAGs from alligator carcasses (ACS), backstraps (ABS), feet (AFT) and eyeballs (AEB), to evaluate their …

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Isolation And Identification Of Foodborne Pathogens And Spoilage Bacteria In Environmental And Food Samples, Myriam Evelyn Gutierrez Barberena Jan 2016

Isolation And Identification Of Foodborne Pathogens And Spoilage Bacteria In Environmental And Food Samples, Myriam Evelyn Gutierrez Barberena

LSU Doctoral Dissertations

Escherichia coli O157:H7 has become an important problem for human health in the United States. Scientific studies indicate cattle herds as primary reservoirs of E. coli O157:H7. To diagnose this pathogen, proper isolation and identification methods are crucial. From five different culture media, CT-SMAC and CHROMagar™ O157 results analyzed simultaneously were the best option for an effective detection of environmental E. coli O157. Despite extensive research at feedlots and dairy farms, there is limited information available on the prevalence of E. coli O157:H7 at cow/calf operations. From 28 small-scale cow/calf operations in the state of Louisiana, we observed an 8% …

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The Development Of A Reduced Glycemic Load/High Fiber Pasta Using Pulses, Christopher Ringuette Jan 2016

The Development Of A Reduced Glycemic Load/High Fiber Pasta Using Pulses, Christopher Ringuette

LSU Master's Theses

The use of beans in the human diet provides an excellent source of dietary fiber and has potential for lowering glycemic load. Prepared meals with high levels of dietary fiber and low glycemic loads were found to be rare in a market survey of nine stores with various price points in the greater Baton Rouge area. The majority of the prepared meals found fell into low or medium fiber categories with medium to high glycemic loads. This indicates a need to increase the fiber level and decrease the glycemic load in popular foods. The purpose of this research is to …

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Sprague Dawley Rats Were Able To Ferment Purified Resistant Starch And Whole Grain Starch On Moderate And High Fat Diets, Justin Lamont Guice Jan 2016

Sprague Dawley Rats Were Able To Ferment Purified Resistant Starch And Whole Grain Starch On Moderate And High Fat Diets, Justin Lamont Guice

LSU Master's Theses

Whole grain (WG) and fat content of the diet have been previously shown to affect intestinal fermentation and phenotype conferred by high–amylose maize starch (HAM), a form of fermentable dietary fiber. The current study was designed to compare rodent gut health following consumption of whole grain and non–whole grain prebiotics on moderate fat (MF) and high fat (HF) diets using a 2x2x2 factorial design. MF and HF diets were prepared to contain the following diet sources: (1) control starch with no WG or RS [CON], (2) whole grain waxy corn flour with low RS [WWG], (3) purified HAM resistant starch …

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Caregiver Choice In Autism Intervention: Selections And Influential Factors, Hilary Lynn Adams Jan 2016

Caregiver Choice In Autism Intervention: Selections And Influential Factors, Hilary Lynn Adams

LSU Doctoral Dissertations

Although research on Autism Spectrum Disorder (ASD) continues to increase, there is not yet a “cure” for the disorder. There is a lack of consensus regarding most effective treatments, much less an accepted treatment plan or course. Families may feel alone and lost in the treatment decision process. In order to best assist caregivers, psychologists must understand the selections caregivers make, their sources of information, and what influences them in their decision-making process. With this knowledge, clinicians may best effect change in caregiver choice by encouraging informed decision-making and use of empirically-based interventions. Thus, the purpose of the current study …

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Detection And Alleviation Of Pesticide Residue In Food And Water, Olubode James Adeniyi Jan 2016

Detection And Alleviation Of Pesticide Residue In Food And Water, Olubode James Adeniyi

LSU Doctoral Dissertations

Use of pesticide has become part of modern day agricultural practice. Some pesticides can remain in the environment for decades and contaminate surface water that is used for irrigation of produce. Two studies were conducted- first to examine possible pesticide residue in surface water and some fruits, vegetables and cereals in Louisiana; and second was to alleviate possible pesticide residues in the water using zeolite filtration. Samples of 8 foods (tomato, corn, rice, blueberry, cucumber, cabbage, wheat and melon) and 35 surface waters were studied using a QuEChERS extraction method for food samples and an EPA method for the water …

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Biological Invasions: Biogeography And Multitrophic Interactions, Warwick Allen Jan 2016

Biological Invasions: Biogeography And Multitrophic Interactions, Warwick Allen

LSU Doctoral Dissertations

Species interactions play a prominent role in the establishment and spread of many invasive species. However, rarely are invasions studied in more than a direct pairwise species context, or with consideration to how species interactions can vary biogeographically. I used field surveys combined with common garden and greenhouse experiments to investigate how multitrophic above- and belowground interactions influence plant invasions at large spatial scales. I focused on comparisons between sympatric native and invasive lineages of Phragmites australis, a wetland grass distributed throughout North America. I conducted a field survey to examine support for the enemy release hypothesis in a tritrophic …

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Studies On Development Of End Rot In Sweetpotato, Ratchanee Pattaravayo Jan 2016

Studies On Development Of End Rot In Sweetpotato, Ratchanee Pattaravayo

LSU Doctoral Dissertations

End rot development in sweetpotato is caused by several pathogens and exacerbated by unfavorable environments. A critical need exists to know what factors in the environment trigger end rot development and how to manage the crop to minimize the incidence of end rots which are the overall objectives of this study. This research was divided into three studies: 1) Effect of environmental factors on expression of end rot in sweetpotato roots. Factorial combinations consisted of flooding/non-flooding; skinned/non-skinned; cured/non-cured; recommended storage/ambient storage are environmental variables not tested previously together in a systematic way. Results showed that curing at 29oC and 85-90% …

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Cardiovascular And Autonomic Nervous System Function: Impact Of Glucose Ingestion, Hydration Status And Exercise In Heated Environments, Kate Suzanne Early Jan 2016

Cardiovascular And Autonomic Nervous System Function: Impact Of Glucose Ingestion, Hydration Status And Exercise In Heated Environments, Kate Suzanne Early

LSU Doctoral Dissertations

Cardiovascular function is under the influence of autonomic nervous system, both of which can be assessed non-invasively. The purpose of this dissertation was to examine these non-invasive markers of cardiovascular and autonomic function and their relationships with exercise training, glucose ingestion and hydration status. A series of three studies were conducted to gain insight to various influences on cardiovascular and autonomic function. The first study examined the influence of exercise training of brachial artery flow-mediated dilation (BAFMD) using meta-analytic techniques. Sixty-six studies included in the analysis demonstrated exercise training improves BAFMD compared to controls. Results indicated exercise training significantly alters …

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Feeding Ecology Of Red Snapper And Greater Amberjack At Standing Platforms In The Northern Gulf Of Mexico: Disentangling The Effects Of Artificial Light, Kristin Leanne Foss Jan 2016

Feeding Ecology Of Red Snapper And Greater Amberjack At Standing Platforms In The Northern Gulf Of Mexico: Disentangling The Effects Of Artificial Light, Kristin Leanne Foss

LSU Master's Theses

Approximately 2,300 petroleum platforms are currently operating in the Gulf of Mexico (GOM), and are estimated to provide an additional 4 to 12 km2 of artificial reef habitat. The ecological role of platforms has often been overlooked and little is known about the effect of artificial light from the active platforms on surrounding fish communities. This is the first study to address the potential impacts of artificial light on the trophic ecology of fish communities surrounding offshore platforms through gut content (GCA) and stable isotope (SIA) analyses. Red snapper (Lutjanus campechanus) were collected quarterly from February 2014 to November 2015 …

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Effects Of Premature Birth And/Or Low Birthweight On Developmental Outcomes, Rachel L. Goldin Jan 2016

Effects Of Premature Birth And/Or Low Birthweight On Developmental Outcomes, Rachel L. Goldin

LSU Doctoral Dissertations

Advances in neonatal technology have improved survival rates of children born at lower and lower birthweight and after fewer and fewer weeks of gestation. However, these children are at increased risk of experiencing developmental delays. As weeks of gestation and birthweight decrease, the risk of developmental impairment and severity increases. Yet to be determined is whether premature birth and low birthweight (LBW) effect development differentially, and if the combined, have an additive effect on developmental outcomes. The first part of this study aimed to examine the independent effects of preterm birth and LBW in children at risk for developmental delays. …

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Nucleobindin-2: A Novel Regulator Of Immune-Metabolic Interactions, Anthony Ravussin Jan 2016

Nucleobindin-2: A Novel Regulator Of Immune-Metabolic Interactions, Anthony Ravussin

LSU Doctoral Dissertations

Over the past half century, obesity has become a widespread concern to human health. Obesity is defined as having a body mass index above 30 and is accompanied by altered metabolic physiology. Obesity is one of the leading causes of mortality in the United States and in the world. The prevalence of obesity has increased over the past few decades. High body fat in adipose, excess calorie intake, low aerobic fitness are all associated with the comorbidities of obesity. Recently, an emphasis has been given to increased leukocytes in adipose tissue and the resulting low-grade systemic inflammation on the development …

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Evaluation Of Absorption And Uptake Of Soil- And Foliar-Applied Silicon In Rice And Its Accumulation Under Different Phosphorus Rates, Flávia Bastos Agostinho Jan 2016

Evaluation Of Absorption And Uptake Of Soil- And Foliar-Applied Silicon In Rice And Its Accumulation Under Different Phosphorus Rates, Flávia Bastos Agostinho

LSU Master's Theses

Silicon (Si) fertilization has gained attention in rice (Oryza sativa) production. However, the common soil-applied sources are amended at high rates, whereas the efficacy of foliar Si application is yet to be proven. A series of pot experiments were conducted to (1) elucidate the effects of different Si sources on grain yield and Si accumulation of rice supplied with varying P rates, and 2) evaluate Si absorption and uptake by rice via foliar- and soil-application of Si fertilizers. First, three phosphorus (P) rates (0, 112, and 224 kg P ha-1) and three Si sources: two soil-applied (wollastonite and silicate slag) …

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