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.

受干扰和退化的土地通常对生产力有一种物理或化学限制，必须加以解决 如果要恢复到扰动前的状态，就必须克服这些困难。他们保留营养的能力 由它们的阳离子交换能力（CEC）和保水能力来表示，以确保持续的 农作物的供应往往有限。克服这些限制的一种方法是添加土壤 改良剂，特别是有机来源的改良剂，如动物粪便和作物残渣。在几个领域 在存在这些受干扰的土地的地方，无法获得粪便，必须寻找其他有机改良剂来 恢复土地。苜蓿颗粒由西部苜蓿制粉有限公司以脱水苜蓿为原料制成。 (WAMCO)，北美饲料用苜蓿颗粒生产领域的领导者。苜蓿颗粒是一种多用途 可以提供重要营养物质和有机物的材料，具有保水性能，可以帮助 缓解土壤压实和通气问题。 CEC是影响植物养分的重要土壤特性 储存和吸收。多项研究表明，施用动物粪便后 CEC 会增加。致我们的 据了解，之前没有研究检验过苜蓿颗粒和用量对土壤 CEC 的影响。一个重要的 影响生产力的土壤物理性质是保水性。工厂可用水量 土壤的保水量可以根据田间持水量（FC）和永久萎蔫点的土壤保水量来估算 （PWP）。土壤保水能力很大程度上受土壤有机质增加的影响。粪肥已为人所知 以改善土壤保水能力。如果苜蓿颗粒作为土地的替代有机改良剂 填海时，它们必须对水的保留和阳离子交换能力有明显的影响 土壤。因此，本研究的目的是确定不同比例的苜蓿颗粒对植物的影响。 沙土和粘土的CEC和保水能力。苜蓿颗粒的功效知识 对这些土壤特性的了解将为 WAMCO 提供有关这些颗粒的潜力的宝贵信息 作为有机改良剂，从而扩大其使用范围和市场潜力。