Earth Sciences Commons^™

Water Requirement And Water Requirement Rate Of Alfalfa In Bashang Area, Hongren Sun, Lingfa Ma, Jianguo Han, Ruixin Wu, Pinghong Li

IGC Proceedings (1977-2023)

No abstract provided.

The Rooting Depth, Root Biomass And Its Vertical Distribution Regularity Of Alfalfa In Different Growing Years In Beijing Plain, Hongren Sun, Jianyi Sun, Tianfu Guan, Ruixin Wu, Lingfa Ma, Pinghong Li

IGC Proceedings (1977-2023)

No abstract provided.

Radiation Use Efficiency Of Alfalfa‐Tall Fescue Mixtures In A Temperate Humid Area, Omar Scheneiter, O. Bertín

IGC Proceedings (1977-2023)

No abstract provided.

Forage Potential Of Alfalfa (Medicago Sativa L.) For Wildlife, D. Maćešić, S. Sikora, Z. Svečnjak, D. Uher

IGC Proceedings (1977-2023)

No abstract provided.

Growth Parameters Of Forages In A Cool Semi‐Arid Climate, Shabtai Bittman, Duane H. Mccartney, F. C. Stevenson

IGC Proceedings (1977-2023)

No abstract provided.

Differential Gene Expression Patterns Of Male Sterile Lines Of Alfalfa Hybrids At Bud Differentiation Stage And Heterosis, Liyan Cai, Fengling Shi, Cuiping Gao, Fengyan Yi, Xia Gao

IGC Proceedings (1977-2023)

Alfalfa (Medicago sativa L.) is important legume forage that is widely cultivated in China and other countries. Alfalfa breeding can’t meet the need of production now, highlighted in yield and resistance of current alfalfa cultivars (He et al., 2000; Wei et al., 2007). Increasing heterozygosity of hybrids and thus the heterosis is a way to breed alfalfa cultivars with high yield and resistance (Hong et al., 2009). The objective of this study was to investigate the correlations of various differential gene expression patterns with forage yield in order to better understand the role the alfalfa male …

Feed And Fodder–A Major Challenge In Cold Arid Region Of Leh, Mahendra Singh Raghuvanshi, R. K. Bhatt, J C. Tewari, Stanzin Landol, Jigmat Stanzin

IGC Proceedings (1977-2023)

Agriculture and animal husbandry in cold arid region are interwoven with the complex fabric of the society in sociocultural, religious and economical ways. Mixed crop-livestock farming systems have exerted a powerful influence on climate of Leh because of dissected topography with high peaks and deep valleys, having immense surface area and substantial area of which is clothed with a massive green mantle of plant cover during cropping season. Increased development in terms of increased agriculture, construction of roads, other miscellaneous constructions, and revenue oriented forestry has accentuated deforestation to meet the demand of fuel, fodders based industries. This has also …

Effects Of Alternate Furrow Irrigation On The Forage Quality Of Alfalfa (Medicago Sativa), Xiao Yu, Zhengang Guo, Tingting Jia, Yuying Shen

IGC Proceedings (1977-2023)

Alfalfa (Medicago sativa) is widely used to establish pasture to sustain animal production because of its high nutritional quality for livestock (Bouton, 2012). Therefore improving quality of alfalfa pasture is the main goal for establishing pasture throughout the world. Irrigation is an important approach for achieving high qualities of alfalfa pasture, however, the scarcity of water threatens the sustainability of world alfalfa production, requiring us to force on using water more efficiently (Liu and Guo, 2013). Alternate furrow irrigation has been proved as a water-saving technique to promote fruit quality of tomatoes and grapevines and the seed quality …

Development And Validation Of Molecular Markers For Phytophthora Medicaginis Resistance In Lucerne, David J. Armour, Karen S. Aitken, John A. G. Irwin

IGC Proceedings (1977-2023)

Resistance to Phytophthora medicaginis is an essential attribute to incorporate into lucerne (Medicago sativa) cultivars which are likely to be grown on heavy soils or in conditions where the soil remains excessively wet for prolonged periods. Current breeding strategies rely on recurrent phenotypic selection to maintain adequate levels of resistance in newly developed synthetic cultivars. However, little is known about the source or mechanism(s) of genetic resistance operating in the cultivar. A genetic linkage map was generated from a tetraploid M. sativa population using SSR markers anchored to existing genetic and physical maps. Large effect QTL were identified …

Effects Of Se And Co Combined Fertilizer On Production Of Alfalfa, Xiao Guo, Xiao-Lei Jie, Hua-Feng Hu

IGC Proceedings (1977-2023)

Selenium(Se) and cobalt (Co) are important essential trace elements for forage and animal production (Yang et al. 1998, Arvy 1993). The supplementation of Se in animal diet significantly increases Se-Glutathione peroxidase (GSH-Px ) activities in the liver, testes, spermatozoa and seminal plasma (Abdelrahman et al.1998), Selenium is also a key component of a number of functional seleno-proteins. GSH-Px is the best characterized of the family of selenoproteins. In Henan Province, the fine grass and green milk production zones are mainly distributed along the riverbank of the Yellow River where soils are sandy and sterile with lower Se and Co …

The Effect Of Different Types Of Inoculants On The Characteristics Of Alfalfa, Ryegrass And Red Clover-Ryegrass-Timothy Silage, Vilma Vrotniakiene, Jonas Jatkauskas

IGC Proceedings (1977-2023)

Silage inoculants based on lactic acid bacteria (LAB) have demonstrated improvements in energy and nutrient recovery from grass and legume silages by lowering the pH and shifting the fermentation towards lactic acid production, by reducing storage losses due to spoilage and by increasing the aerobic stability during feed-out. There are different mixtures of strains currently on the market.

The present study was conducted according to the Deutsche Landwirtschafts-Gesellschaft Guidelines for the testing of silage additives in order to assess which mixtures of lactic acid bacteria would have a greater potential to improve fermentation profile of alfalfa, perennial ryegrass and red …

Assessment Of Drought Resistance For 17 Alfalfa Varieties At The Seedling Stage, Lin Meng, Peichun Mao, Qiang Guo

IGC Proceedings (1977-2023)

Alfalfa is a crop of relative water demand, and the good quality, the high and stable yield could be obtained directly depending on water supplies and strong or weak drought resistance ability of alfalfa cultivars (Geng 1995; Chen and Jia 2000). To guide steady and effectively development of alfalfa industrialization in the arid and semi-arid regions of China, we systematically selected the excellent drought resistant alfalfa cultivars, and then identified and assessed their drought resistant capacity. In this study, a pot experiment was conducted by simulating drought stress in a greenhouse to assess the drought resistance of seventeen alfalfa cultivars …

Delayed Sowing Decreased Lucerne Dry Matter Yield Over Two Seasons, Richard Sim, Derrick Moot

IGC Proceedings (1977-2023)

Lucerne (Medicago sativa L.) can be sown in New Zealand from late spring (October) to early autumn (March). In the establishment season, greatest drymatter (DM) yields are normally attained from sowing early and production lost from delayed sowing is only considered in the establishment season. The objective of this research is to determine if sowing date continues to have an effect on DM yield in year two and how the partitioning of DM between the above and below ground plant fractions is influenced by sowing date.

Subsoil Acidity Determines Survival Of Lucerne On A Highly Acidic Soil, Guangdi Li, Mark Conyers, Richard Lowrie, Graeme Poile

IGC Proceedings (1977-2023)

Lucerne (Medicago sativa) is one of most productive perennial species in southern Australia. However, productivity is severely restricted under acid soils (Irwin et al. 2001). Fenton et al. (1996) reported that lucerne performs poorly if soil pH was below 5 and exchangeable aluminium was over 5%. It is estimated that there are 24 m ha of acidic subsoil in southern Australia (Dolling et al. 2001). A long-term liming experiment, 1992 to 2010, aimed to ameliorate subsoil acidity via a vigorous liming program (Li et al. 2001). This paper reports survival of lucerne during the …

Effect Of Lactobacillus Plantarum On Fermentation Quality Of Alfalfa Silages Mixed With Different Proportions Of Jujube Powder, Jipeng Tian, Zhu Yu, Zhongkuan Liu, Zhenyu Liu, Qing Zhang, Xujiao Li, Yu Wang

IGC Proceedings (1977-2023)

Hebei province is one of the main production areas of alfalfa (Medicago sativa) in China. While alfalfa is used to make silages, it is necessary to improve the fermentation quality of alfalfa silage. Jujube powder which contains a high content of sugar, might be a good material to ensile mixed with alfalfa. On the other hand, the effect of lactic acid bacteria (LAB) has been documented and has been used as an additive to achieve good preservation of silage.

The objective of this study was a) to screen different ratios of jujube powder in the mixed silage of …

Improving Forage Nonstructural Carbohydrates Through Management And Breeding, Gilles Bélanger, Gaëtan F. Tremblay, Annick Bertrand, Yves Castonguay, Robert Berthiaume, Réal Michaud, Sophie Pelletier, Chantale Morin, Carole Lafrenière, Guy Allard

IGC Proceedings (1977-2023)

Nonstructural carbohydrates (NSC) are an important source of readily fermentable energy available to rumen microbes. Limited concentrations of readily available energy in forages combined with fast and intensive protein degradation contribute to poor N use efficiency by dairy cows and other ruminants. Increasing NSC in forages has been shown to improve intake, milk yield, and N use efficiency (Brito et al. 2009). We assessed several strategies to increase forage NSC accumulation, including PM-cutting, species selection and genetic improvement.

Global Illumina Sequencing And The Development Of Est-Ssr Markers In Alfalfa, Zhipeng Liu, Yanrong Wang

IGC Proceedings (1977-2023)

RNA-Seq, a massively parallel sequencing method for transcriptome analysis, only analyzes transcribed portions of the genome. Recently, RNA-Seq has provided an opportunity to expand the identification of alfalfa (Medicago sativa) genes. Using Illumina sequencing, 124,025 unique sequences from MSGI 1.0 have been identified from the elongating stem and post-elongation stem internodes of two alfalfa genotypes (Yang et al. 2011). Using 454 sequencing, 54,216 unique sequences were obtained from the roots and shoots of two alfalfa genotypes (Han et al., 2011). In addition, Illumina sequencing of old and young stems of 27 alfalfa genotypes led to the …

Selection For Improved Saccharification Efficiency In Alfalfa Stems Assessed By Enzyme-Released Glucose, Annick Bertrand, Yves Castonguay, Réal Michaud, Marc-Olivier Duceppe

IGC Proceedings (1977-2023)

Alfalfa (Medicago sativa L.) has a high potential for sustainable bioethanol production, particularly because of its low reliance on N fertilizer (Samac et al. 2006). Genetic improvement for the accumulation of readily fermentable non-structural carbohydrates (NSC) and the saccharification of structural carbohydrate (SC) could significantly increase ethanol conversion rate. Genetic gains for these traits are tributary to the availability of screening techniques for the precise identification of superior genotypes with increased potential for the production of fermentable carbohydrates.

When assessing the genetic variability of parameters linked to cellulosic ethanol production (concentrations of NSC and SC), our results showed …

Physiological Characterization Of Cut-To-Cut Yield Variations Of Alfalfa Genotypes Under Controlled Greenhouse Conditions, Defeng Li, Baoluo Ma, Chengzhang Wang, Pufang Li

IGC Proceedings (1977-2023)

In a temperate region, alfalfa (Medicago sativa) crops are usually harvested 3-6 times per annum. The biomass yields of first and second cuts in the spring are generally the high-est. However, in subsequent cuts the biomass yields decline, with the final 1 or 2 cuts producing the lowest yields (Wang et al. 2009). This seasonal reduction in alfalfa biomass yields could be associated with prevailing changes in environmental factors such as rainfall and heat stress or due to biological characteristics of alfalfa crop itself. In this study, alfalfa was grown under controlled greenhouse conditions with suitable temperature, …

Perennial Legume Swards For Organic Farming System In Lithuania, Jonas Šlepetys, Alvyra Slepetiene

IGC Proceedings (1977-2023)

The economic and ecological benefits of forage legumes are well known. While perennial legumes can be useful in various aspects (Ledgard 2001), some legumes have short persistence in swards (Frame et al.1998; Vaiciulyte and Bacenas 2008) which is undesirable for organic farms where no mineral nitrogen is applied. Early flowering red clover (Trifolium pratense), which is the most common legume in Lithuania, has high yields only in the first – second years of use. In the third year, it often disappears completely.

In Lithuania, fodder galega (Galega orientalis) is the most long lived legume exhibiting …

Fodder Yield And Quality Of Lucerne (Medicago Sativa) Grown As Pure Stands And In Mixture With Oats (Avena Sativa), Mustard (Brassica Campestris) And Ryegrass (Lolium Perenne) Under Different Cutting Managements, Balwinder Kumar, U. S. Tiwana, Ajaib Singh

IGC Proceedings (1977-2023)

Legume-cereal mixtures are important protein and carbohydrate sources for livestock and provide a balanced chemical composition for livestock feeding along with higher green forage yields than the pure stands (Berdahl et al. 2001; Albayrak and Ekiz, 2005). Lucerne is the most important rabi legume crop of Punjab grown under limited irrigation conditions and provides succulent, palatable and nutritious fodder to dairy animals. The fodder yield of first cut of lucerne is very low so it is usually grown in mixture with oats and or mustard. The information on the mixtures of lucerne and suitable cutting times is scant. This …

Scenario Analysis: Risk And Return Of Aluminium Tolerant Lucerne, Claire D. Lewis, J. L. Jacobs, K. F. Smith, G. Spangenberg, B. Malcolm

IGC Proceedings (1977-2023)

Lucerne (Medicago sativa) yield is limited by aluminium stress associated with acid soils (Campbell et al. 1988; Scott et al. 2008). With the aid of transgenic technologies, the development of aluminium tolerant (Al Tol) lucerne is proposed. Modelled scenario analysis was conducted to explore the potential net benefits of Al Tol lucerne as part of a grazing system for a sheep production system in the high rainfall zone of south west Victoria.

Informing Field Management Decisions To Enhance Alfalfa Seed Production Using Remote Sensing, Thomas V. Van Der Weide

Boise State University Theses and Dissertations

The development rate of alfalfa seed crop depends on both environmental conditions and management decisions. Crop management decisions, such as determining when to release pollinators to optimize pollination, can be informed by the identification of plant development stages from remote sensing data. I first identify what electromagnetic wavelengths are sensitive to alfalfa plant development stages using hyperspectral data. A Random Forest regression is used to determine the best Vegetation Index (VI) to monitor how much of the plant is covered in flower. The results indicate that Blue, Green, and Near-Infrared are the important electromagnetic wavelengths for the VI. Imagery collected …

Lucerne For Acid Soils: A Field Evaluation Of Early Generation Aluminium Tolerant Genotypes, Richard C. Hayes, Guangdi Li, Shoba Venkatanagappa, Alan W. Humphries, Ross Ballard

IGC Proceedings (1977-2023)

The development of lucerne germplasm tolerant of acidic soil conditions has long been a research objective of international significance. Many initiatives have previously failed to produce genotypes with adequate improvement in tolerance to be deemed economically viable and as a consequence, still no cultivar of lucerne exists that has improved adaptation to acidic soils. An Australian research program spanning the previous decade sought to redress this issue by developing lucerne genotypes with significantly enhanced tolerance to aluminium (Al) toxicity. Using recurrent selection in hydroponic solution culture, populations selected comprised individuals which displayed enhanced seedling root growth following a pulse of …

Slides: Food Production: Technical Challenges In Agricultural Water Conservation, Perry Cabot

Innovations in Managing Western Water: New Approaches for Balancing Environmental, Social and Economic Outcomes (Martz Summer Conference, June 11-12)

Presenter: Dr. Perry Cabot, Research Scientist and Extension Specialist, Colorado Water Institute, Colorado State University

35 slides

Slides: Smart Fallowing: New Strategies In Ag Forbearance, Bonnie Colby

Navigating the Future of the Colorado River (Martz Summer Conference, June 8-10)

Presenter: Dr. Bonnie Colby, Department of Agriculture & Resource Economics, University of Arizona

34 slides

Assessment Of Row Crop, Alfalfa, And Pasture Field Practices On Groundwater Quality In An Upland Bedrock Setting, Henderson County, Kentucky: Report Of Soil- And Water-Quality Data, E. Glynn Beck, James S. Dinger, John H. Grove, Eugenia Pena-Yewtukhiw

Information Circular--KGS

An assessment of how present agricultural practices have influenced shallow groundwater and soil quality was conducted on a 540-acre farm in north-central Henderson County. Groundwater- and soil-quality data were collected from row crop (corn and soybean), alfalfa, and pasture fields. In addition to the field settings, groundwater and soil data were collected from the existing farmyard and an abandoned feedlot. Groundwater samples were analyzed for pH, specific conductance, temperature, oxidation-reduction potential, metals, anions, nutrients, herbicides, and various isotopes. Soil samples were analyzed for pH, bioavailable phosphorus, potassium, calcium, magnesium, zinc, organic matter, total nitrogen, and inorganic nitrogen (nitrate-N). Soil- and …

Efficiency Of The Inorganic Fertilization In The Cultivation Of Alfalfa (Medicated Sativa L) And Whitewashing For The Correction Of The Ph Of The Soil, Alex Gonzalo Bravo Morocho

Theses and Dissertations

In our country the necessity to offer new alternatives for the agricultural sector is high-priority especially for the lucern cultivation that every day is surface cultivated especially in the Chimborazo province increases; for what is of our interest to establish the answer from the cultivation to the inorganic fertilization and liming for the flora pH correction, for this way to obtain better yields and for consequence to improve the economic conditions of the farmers. With the result that the titled investigation: Efficiency of the Inorganic Fertilization in the Alfalfa Cultivation (Medicago sativa L) and Liming for the Correction of the …

Effect Of Magnesium And Sulfur Fertilization Of Alfalfa, Kenneth L. Wells, James E. Dollarhide

Soil Science News and Views

In response to concerns that high yields of alfalfa need to be fertilized with sulfur (S) because of soil depletion of S and less S entering the soil from atmospheric fallout, studies were conducted during 1998-1999, to test for S response by alfalfa. Additionally, alfalfa was tested for magnesium (Mg) response because previous hay analysis from the study site had shown very low levels of Mg.

Drawdown Of Soil Test Phosphorus And Potassium Levels By Alfalfa, Kenneth L. Wells, James E. Dollarhide

Soil Science News and Views

Alfalfa hay production removes large amounts of phosphorus (P) and potassium (K) from soils. Because of this, there is always interest in the reduction of soil test phosphorus (STP) and soil test potassium (STK) levels by high-yielding alfalfa. Periodic soil sampling for 2 years during an on-farm· fertilizer study on a high yielding alfalfa field provided an insight into this.