防磷固定剂对土壤有效性的影响

发布时间：2018-02-09 09:43

本文关键词： 滴灌防固定剂磷酸一铵　出处：《西南农业学报》2017年11期 　论文类型：期刊论文

【摘要】：【目的】研究施用不同防磷固定剂对磷在土壤中移动深度及持续有效性的影响,以提高磷肥利用率,满足作物对磷素的需求。【方法】采用连续浸提法、室内模拟土柱法,研究不同防固定剂(A,B,C)对水溶性磷肥(MAP)在土壤中移动的有效深度的影响。【结果】在滴灌条件下,滴施常量水溶性磷肥在土壤中很快被固定而无效,增加了施肥成本。防磷固定剂可提高水溶性磷在土壤中的移动深度,迁移至10 cm以下,但不超过15 cm。150 d内施用防磷固定剂可持续增加土壤的速效磷含量,净增量是水溶性磷肥的0.88~1.29倍。【结论】防磷固定剂A,B,C能防止水溶性磷肥被土壤固定,增加P素在土壤中的移动性。
[Abstract]:[objective] to study the effects of different phosphorus control fixators on the depth of phosphorus movement and the sustainable availability of phosphorus in soil in order to improve the utilization rate of phosphorus fertilizer and to meet the demand of crops for phosphorus. [methods] continuous extraction method was used to simulate the soil column method in laboratory. To study the effect of different fixators (AZB) on the effective depth of water-soluble phosphate fertilizer (MAPP) moving in soil. [results] under drip irrigation, the constant amount of water-soluble phosphate fertilizer was immobilized quickly in the soil. The application of phosphorus control fixator can increase the moving depth of water-soluble phosphorus in soil, and migrate to less than 10 cm, but it can increase the content of available phosphorus in soil within 15 cm.150, but not more than 15 cm.150, but not more than 15 cm.150, but not more than 15 cm.150, the application of phosphorus fixation agent can increase the content of rapidly available phosphorus in soil. The net increase of P fertilizer was 0.88U 1.29 times of that of water-soluble phosphate fertilizer. [conclusion] the anti-phosphorus fixation agent AZB _ (C) can prevent water-soluble phosphorus fertilizer from being fixed by soil and increase the mobility of P in soil.
【作者单位】：新疆农业大学草业与环境科学学院;新疆草地资源与生态实验室;
【基金】：基金项目:国家牧草产业技术体系(CARS-35-02A)
【分类号】：S158

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