Agronomy and Crop Sciences Commons^™

Mineral Status Of Livestock, Soil, Feeds And Fodders In Ajmer District Of Rajasthan, Sheela Choudhary, Ramkesh Meena, Sunil Dutt Choudhary, Poonam Yadav

IGC Proceedings (1977-2023)

A large number of Indian livestock suffer from deficiencies or imbalances in minerals because they are mainly maintained on crop residue based rations and grazing without access to mineral supplement (Mc Dowell et al., 1993). Deficiency or imbalance of single or multiple minerals results in enzymatic dysfunction and hormonal imbalance associated with fertility of animals (Maurice, 2003). In India where dietary concentration of fodder fed to the animals are unknown or highly variable due to availability, season, location, forage, species and animal potential (Sharma et al., 2003), it is important to determine plasma mineral concentrations in animal region wise, …

The Clover Root Weevil Invasion: Impact And Response Of The New Zealand Pastoral Industry 1996-2012, Philippa J. Gerard, James R. Crush, Colin M. Ferguson, Scott Hardwick, Mark R. Mcneill, Craig B. Phillips

IGC Proceedings (1977-2023)

Clover root weevil, Sitona lepidus Gyllenhall (Curculionidae: Coleoptera), was first reported in New Zealand in 1996. With few natural enemies or competitors, it rapidly became a major pest of white clover. Its strong flight capability, tendency to be transported in agricultural machinery and vehicles, and wide climatic tolerance enabled it to spread the length of the country (1,600 km) by 2010. The most damaging stage is the larva, which attacks the roots, root nodules and stolons of clovers, reducing herbage production (particularly in spring), pasture clover content, and nitrogen fixation. From the time of the initial invasion, the pastoral industry …

Prescribed Fire: A Proposed Management Tool To Facilitate Black-Tailed Prairie Dog (Cynomys Ludovicianus) Colony Expansion, Felicia D. Archuleta, Paulette L. Ford

IGC Proceedings (1977-2023)

Black-tailed prairie dogs (Cynomys ludovicianus) are considered a keystone species in grassland ecosystems. Through their burrowing activities, they conspicuously alter grassland landscapes and provide foraging, shelter and nesting habitat for a diverse array of grassland species, in addition to serving as prey for the endangered black-footed ferret (Mustela nigripes). Due to a combination of factors, the lands currently occupied by prairie dog colonies are thought to represent less than 10% of their historical range. Black-tailed prairie dogs have difficulty colonizing areas with tall and/or dense plant cover. We examine how manipulations of grassland vegetative structure through …

Influence Of Foliar Nutrition Of Selenium On Phytochelatines Content In The Forage Of Red Clover (Trifolium Pratense L.), Iva Klusoňová, Pavel Horký, Jiří Skládanka, Markéta Komínková, Vojtěch Adam, René Kizek, Petr Škarpa, Lucia Hodulíková

IGC Proceedings (1977-2023)

Selenium (Se) is an essential element significantly influencing health status of animals and humans. The insufficient supply of organism with this element leads to many disorders. Conversely, higher intake can be toxic. As a part of selenoproteins, it regulates the antioxidant system and thus prevents the oxidative destruction of biological membranes and prevents the damage of the body by heavy metals. Consequently, its deficiency disrupts the overall health of animals and humans because of involvement of selenium compounds in many biological functions. Selenium concentration of plant biomass is derived from its content in the soil and may considerably vary depending …

Evaluation Of Quality Traits Of Nitrogen Treated Napier Bajra Hybrid Plants In Different Cuts Using Different Nitrogen Sources, Meenakshi Goyal, Rupinder Kaur, U. S. Tiwana

IGC Proceedings (1977-2023)

Napier Bajra Hybrid, cv PBN-233 is a inter-specific hybrid between Pennisetum glaucum × Pennisetum purpureum. It is an important fast growing multi-cut fodder crop and provides fodder from April to November. It is widely distributed in sub-tropical regions of Asia, Africa, southern Europe and America. Nitrogen (N) is a fundamental regulator of plant growth and its supply strongly influence plant growth. In general, the availability of the nutrients influences the quality of various crops. Due to this reason, nitrogen fertilizers were increasingly used in agricultural sectors around the world. Some researchers reported that forage quality increased with nitrogen fertilization …

Enhancing Fodder Oat (Avena Sativa) Production In Problem Soils Using Phosphate Solubilizing Fungi Isolated From Acid And Salt Affected Soils Of India, R. Srinivasan, G. Prabhu, Manoj Chaudhary, Auji Radhakrishna, Sharmishtha Paul

IGC Proceedings (1977-2023)

Tropical and subtropical soils are predominantly acidic, and often extremely phosphorus-deficient with high phosphorus sorption (fixation) capacities. Phosphorus (P) is one of the major essential macronutrients for plants, present at levels of 400–1200 mg/kg of soil. One of the drawbacks of fertilization is that only a fraction of the P added is eventually assimilated by plants, due to high reactivity of soluble phosphate with other elements the rest becomes unavailable to plants by forming complexes with either, Al, Fe, Ca or Mn depending on soil type (Rodríguez and Fraga, 1999). Even though some soils may have high levels of total …

Composting Characteristics Of Bovine Manure Produced By Conventional Stacked Processing And An Experimental Small-Scale Apparatus, Yusuke Kajiya, Yasuyuki Ishii, Kiichi Fukuyama, Sachiko Idota

IGC Proceedings (1977-2023)

Southern Kyushu is an important center of beef production in Japan and the large amounts of bovine waste that are produced in the region need to be utilized in a way that is not harmful to the environment. One such method is to use the manure to produce organic fertilizer, which can then be used to replace the chemical fertilizer that is used for forage production (Hasyim et al., 2014). The composting of bovine manure involves co-digestion of cow manure with substrates such as sawdust and hay. The composting characteristics of these mixtures are influenced by the relative amounts of …

Modelling The Effects Of Climatic Factors On The Biomass And Rodent Distribution In A Tibetan Grassland Region In China, Quanzhen Wang, Maolin Xia, Bai-Song, Xi-Rao-Zhuo-Ma, Ba-Sang, Jiang- Cuo, Zha-Dui, Jin-Mei, Ze-Duo, Surong Li, Zha-Xi, Yang-Ba, Jia-Yang, Dan-Pei, Jian Cui, Jimin Cheng

IGC Proceedings (1977-2023)

To identify the main climatic factors from 2007 to 2009 that influence biomass and rodent distribution, 576 fixed sample plots within 81 million km² of different climatic grassland in Tibet were monitored. The aboveground biomass, the total burrows, the active burrows, the burrow index, and the rodent density in the plots were measured yearly in October. The monthly precipitation and the average temperatures from April to November were obtained for four successive years (2006-2009). Correlative and modelling analyses between the aboveground biomass, the rodent density, and the climatic factors were performed. The results showed that biomass and rodent density …

Impacts And Management Of Invasive Burrowing Herbivores In Grasslands, Peter J. S. Fleming, Limin Hua, Desley Whisson

IGC Proceedings (1977-2023)

Maintenance of the productivity of the world’s grasslands is critical for livestock production, bio-diversity conservation and ecosystem services. Using case studies from Australasia, North America and China, we identify general principles of managing invasive native and introduced herbivores. Management aims to achieve optimised livestock production while conserving biodiversity and ecosystem services, which are often intangible. We identify similarities and differences in the ecologies and impacts of European wild rabbits, Californian ground squirrel and plateau zokors, discuss management tools and strategies, and the ecological, social and cultural factors affecting management. The ecosystem engineering characteristics of these species that make them important …

Alteration Of Physiological Parameters Of Milkvetch (Astragalus Adsurgens) By The Pathogen Embellisia Astragali, Binhua Yu, Zhibiao Nan

IGC Proceedings (1977-2023)

Milkvetch (Astragalus adsurgens) is sown on > 1 M ha in China as a forage legume and to control soil and water erosion. It is drought-tolerant and has high herbage yield, wide adaptability and medium forage quality. However, fungal disease is a major factor affecting its persistence and productivity. Embellisia astragali is a highly virulent seed-borne pathogen which commonly causes stunt and root rot. The objective of this study was to characterize the impact of Embellisia astragali on the physiological status of milkvetch by monitoring changes through time in net photosynthesis, stomatal conductance and other parameters of milkvetch inoculated …

Comparative Sulfur Use Efficiency And Water Stress Tolerance In Two Brassica Napus Cultivars, Bok-Rye Lee, Tae-Hwan Kim, Sang-Hyun Park, Qian Zhang, Rashed Zaman

IGC Proceedings (1977-2023)

S-deficiency and/or S-deprivation decreases the cell sap osmotic potential resulting from a net increase of intracellular solutes rather than from a loss of cell water and chlorophyll content resulting in a restriction of Rubisco synthesis and provoked the chlorosis of young leaves (Lee et al., 2014; Muneer et al., 2014). These imply that S-deficiency results in a general inhibition of photosynthesis and protein synthesis. On the other hand, several studies have indicated that S nutrition has a potential role in stress tolerance and defense mechanism. Sulfur is an essential element in the formation of sulfhydryl (S-H) and disulphide bond …

Evaluation Of Spittlebug Incidence On Two Grasslands From Mojui Dos Campos Para, Brazil, Andréa Krystina Vinente Guimarães, Daniel Carvalho Evangelista, Adenomar Neves De Carvalho

IGC Proceedings (1977-2023)

Spittlebugs (Homoptera: Cercopidae) are considered the main pests of forage crops, particularly of the genus Brachiaria (Miles et al. 2006) with severe damage caused by the sucking of nymph and adult insects which often leads to reduced dry matter production and forage quality, and may result in death of the above-ground part of plants when spittlebug populations are high (Holmann and Peck 2002). In Brazil, spittlebug incidence is one of six major causes for degradation of Amazon pasture degradation.

This work was carried out to evaluate pastures conditions and spittlebug incidence on marandu grassland (B. brizantha cv. marandu) …

Towards Effective Management: Toxicity, Causal Mechanism And Controlling Strategy Of Toxic Rangeland Weeds In Western China, Wei He, Yongmei Liu, Hao Lu, Baoyu Zhao, Chonghui Mo, Juying Wu, Nengtai Da, Yahui Wei

IGC Proceedings (1977-2023)

Toxic rangeland weeds (TRWs) pose a great threat to animal husbandry. Currently, an estimated 33 million hectares of pasture (10%) in western China is infested by a variety of toxic weeds, including Stellera chamaejasme, Oxytropis spp., Astragalus spp., Achnatherum inebrians. The spread of these toxic weeds results in huge annual economic losses of more than $2.4 billion USD (direct and indirect). A combination of ecology, molecular biology, biochemistry and field practise methods will be used to identify and evaluate TRWs, explore the mechanism of toxicity, and more importantly, understand the causal mechanism by which TRWs flourish. The knowledge …

Effect Of Sample Handling And Storage On Ergovaline Concentration In Fresh Tall Fescue Samples, Krista L. Cotten, Lori Smith, Cynthia L. Gaskill, Robert Coleman, S. Ray Smith

IGC Proceedings (1977-2023)

Ergovaline is an ergot alkaloid produced by an endophyte (Neotyphodium coenophialum Morgan-Jones and Gams), found in tall fescue (Schedonorus arundinacea=Festuca arundinacea Schreb.) and causes a range of disorders across livestock species. The concentration of ergovaline within a plant can vary by variety, management, time of year, location and weather conditions (Smith et al. 2009). Due to the significant economic impact of fescue toxicity in livestock, many samples are tested every year in research and diagnostic laboratories. Ergovaline is known to be unstable and affected by many variables; therefore sample handling is critical to obtaining accurate and consistent …

Effectiveness Of Tronador To Control Brittlebush In Buffelgrass Pastures At Central Sonora, México, Fernando Ibarra-Flores, Martha Martin, Salomón M. Moreno, Fernando Ibarra Jr., Jared Atondo, Francisco B. Denogean, Alfredo V. Aguilar, Rafael Retes

IGC Proceedings (1977-2023)

Buffelgrass (Cenchrus ciliaris L.) is an introduced species which is planted in low productive semi-arid rangelands in northern Mexico to increase productivity and ranchers profit. Brittlebush (Encelia farinosa) is a native half size shrub of low forage value that invades buffelgrass stands. Buffelgrass pastures lose productivity as brittlebush densities increase.

Once brittlebush infestations occur plant densities do not decline unless brush control practices are applied. Mechanical treatments are mainly used when grass seeding is needed. Prescribed burning and manual control as well as granular herbicides have resulted on good plant control. Most liquid herbicides are either not …

A Guide To Noxious Plants As An Educational Resource Of Veterinary Medicine Students, M. G. Klich, G. Atencio, N. Autalán, C. Busson, M. Chazarreta, G. Estevanacio, B. Fernández, G. Lucero, E. Moscovakis, S. Peña, B. Shaap, D. Vallejo

IGC Proceedings (1977-2023)

The School of Veterinary UNRN is located in the town of Choele Choel (39° 17'S, 65° 39'W), in Northern Patagonia, Argentina. The climate is semi-arid with a historical average annual continental rainfall of 303 mm, with marked daily and seasonal temperature ranges. However, the type of vegetation that can be found in the area ranges fromxerophytic shrubs to hydrophytic vegetation because the arid plateau is crossed by the broad valley of Río Negro. Due to the topographic distribution of agricultural and livestock farms, the toxic plants for livestock may be found in the irrigated valleys or arid shrubby camps.

Integrating Mechanical And Cultural Control Treatments To Manage The Invasive Shrub Chromolaena Odorata In Grassland Areas, Muhammad Rusdy, E. K. Budiman

IGC Proceedings (1977-2023)

Chromolaena odorata (L.) King and H. Robinson, is a major invasive weed of pastures and plantation crops in many countries and has become one of the worst invasive plants in grassland areas in Indonesia. Chromolaena can grow rapidly and form infestations that can suppress pasture by competing for nutrients and water, and by over-shading. Its allelopathic effect lowers productivity of desirable forage species with a concomitant loss of livestock production. Chromolaena leaves, especially when young, are toxic to animals due to high levels of nitrate (5 - 6 times above toxic level) (Sajise 1974).

Control of Chromolaena is difficult due …

Influence Of Furrow Tillage And Nitrogen Fertilizer Management On Water Quality And Soil Nitrogen Dynamics In Arkansas Irrigated Cotton, Hunter Wood-Pointfield

Student Theses and Dissertations

Furrow irrigation can increase potential for soil erosion and nutrient losses in agricultural cropping systems. A field experiment to examine furrow tillage and N fertilizer application was conducted in irrigated cotton in northeastern Arkansas. Treatments included a conventional sweep plow or conservation plow to clear water furrows and either a subsurface band of 32% urea ammonium nitrate (UAN) or broadcast urea. Runoff water was collected throughout the experiment at the edge of field, and analyzed for water quality. Soil samples of four depths (0-90 cm) were taken during key crop development stages and analyzed for soil exchangeable N. Soluble nutrients …

Dynamic Of Soil Mesofauna Of Fixed Sand Dunes On The Songnen Grasslands, Northeastern China, Xiuqin Yin, Zhenhai Wang, Dandan Zhang

IGC Proceedings (1977-2023)

Grasslands cover vast land areas in semi-arid and semi-humid regions. Sand dunes, most of which are fixed sand dunes, form a large portion of grasslands. Vegetation on fixed sand dunes is an important part of grassland ecosystem productivity, and topographic position is one of the important factors resulting in the differences among vegetation, soil, etc. (Sakai and Ohsawa, 1994; Nagamatsu and Miura, 1997).

An important component of soil fauna ecology is to analyze the distribution of soil fauna and its influencing factors. On the small scale, the ozone factors become the dominant factor affecting the soil fauna (Frouz et al., …

Fodder Yield Of Baby Corn (Zea Mays L.) As Influenced By Mulching, Liming And Integrated Nutrition Management Under Foot Hill Condition Of Nagaland, Rakesh Kumar, Bidyut C. Deka, Manoj Kumar, Neivah Hansing

IGC Proceedings (1977-2023)

Baby corn (Zea mays L.) being one of the most important dual purpose crop is grown widely round the year for its cob as well as green fodder in India. It has an edge over the other cultivated fodder crops due to its higher production potential, wider adaptability, fast growing nature and excellent fodder quality free from toxicants. Baby corn production has been directly integrated with dairying farms in different countries because only 13-20% of fresh ear weight is used as human food and the rest (silk, husk and green stalk) can be used as excellent feed materials for …