Influence of rates of alfalfa pellets on water retention and cation exchange capacity of a sandy and a clay soil

苜蓿颗粒用量对砂土和粘土的保水性和阳离子交换能力的影响

• 批准号: 487380-2015
• 负责人: Akinremi, OlalekanOluwole
• 金额: $ 1.82万
• 依托单位: University of Manitoba
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=586061
• 关键词: Influence; rates; alfalfa; pellets; water

Disturbed and degraded lands often have one physical or chemical limitation to productivity that must be overcome if they are to be restored to pre-disturbance conditions. Their ability to hold onto nutrients as indicated by their cation exchange capacity (CEC) and their ability to hold onto water to ensure a continuous supply to the crop is often limited. One way to overcome these limitations is through the addition of soil amendments especially those of organic origin such as animal manures and crop residue. In several of the areas where these disturbed lands exist, manure is not available and other organic amendments must be sourced to restore the land. Alfalfa pellet is made from dehydrated alfalfa by Western Alfalfa Milling Company Ltd. (WAMCO), a North America's leader in alfalfa pellet production for feed. Alfalfa pellet is a multi-purpose material that can provide vital nutrients and organic matter, possesses water retention properties and can help alleviate soil compaction and aeration issues. CEC is an important soil property that influences plant nutrient storage and uptake. Several studies have shown increases in CEC following animal manure application. To our knowledge, no previous study has examined the effect of alfalfa pellets and rates on soil CEC. One important physical property of soil that greatly affects productivity is water retention. The plant available water capacity of a soil can be estimated from soil water retention at field capacity (FC) and at permanent wilting point (PWP). Soil water retention is largely influenced by increases in soil organic matter. Manure has been known to improve soil water retention. If alfalfa pellets are to serve as an alternative organic amendment for land reclamation, they must have a demonstrated influence on the water retention and cation exchange capacity of the soil. Therefore the objectives of this study are to determine the effect of different rates of alfalfa pellets on the CEC and water retention capacity of a sandy soil and a clay soil. Knowledge of the effect of alfalfa pellets on these soil properties will provide valuable information for WAMCO on the potential of these pellets to serve as an organic amendment thereby increasing their range of use and market potential.

干扰和退化的土地通常对生产率有一个物理或化学限制，必须是 如果要恢复前扰动条件，请克服它们。他们能够保持营养成分的能力 通过其阳离子交换能力（CEC）和保持水的能力来确保连续 作物的供应通常受到限制。克服这些局限性的一种方法是增加土壤 修订尤其是有机起源的修订，例如动物粪便和作物残留物。在几个领域 在存在这些令人不安的土地的地方，粪便不可用，其他有机修正案必须采购 恢复土地。苜蓿颗粒是由西苜蓿磨坊有限公司用脱水的苜蓿制成的。 （Wamco），北美苜蓿颗粒生产的领导者。苜蓿颗粒是多功能的 可以提供重要养分和有机物的材料，具有保水特性，可以帮助 减轻土壤压实和充气问题。 CEC是影响植物养分的重要土壤特性 存储和吸收。几项研究表明，应用动物粪便后CEC的增加。向我们 知识，先前没有研究检查苜蓿颗粒的影响和对土壤CEC的影响。一个重要 极大地影响生产率的土壤的物理特性是保留水。工厂可用的水容量 土壤的土壤水分在田间容量（FC）和永久性枯萎点可以估算 （PWP）。土壤水保留在很大程度上受土壤有机物的增加的影响。肥料已知 改善土壤保水。如果苜蓿颗粒将作为土地的替代有机修正案 开垦，他们必须对保留和阳离子交换能力有明显的影响 土壤。因此，这项研究的目的是确定不同苜蓿颗粒的速率对 沙质土壤和粘土土壤的CEC和水分保留能力。了解苜蓿颗粒的影响 在这些土壤特性上，将为WAMCO提供有关这些颗粒潜力的宝贵信息 作为有机修正案，从而增加了其使用范围和市场潜力。