三种环境材料对土壤水肥保持效应的影响研究

发布时间：2018-02-24 07:34

本文关键词： 环境材料保水剂腐植酸沸石土壤水分控氮释磷　出处：《农业环境科学学报》2017年09期 　论文类型：期刊论文

【摘要】：采用土柱淋溶实验方法,探究了土壤保水剂、腐植酸和沸石对土壤水分保持、控氮释磷的效应,通过过程分析探讨水肥保持增效的机制。试验结果表明:保水剂对土壤水分保持效果最明显,沸石对氮肥保持和磷肥活化效果最好,在一定范围内随添加量增多效果有增强趋势且效果持久;当保水剂添加量为2 g·kg~(-1)时,土壤水分淋出量相比CK减少4.4%,腐植酸添加量为1.0 g·kg~(-1),氮素淋出量相比CK减少17.4%,沸石添加量为12 g·kg~(-1)时,磷素淋出量相比CK增加68.0%;沸石添加量为9 g·kg~(-1)时,氮磷肥同步增效最好,相比CK,土壤氮素淋出量减少25.1%,磷素淋出量增多29.2%。研究表明,三种环境材料施用对土壤水肥保持具有明显的增强效果。
[Abstract]:The effects of soil water-retaining agent, humic acid and zeolite on soil moisture retention, nitrogen and phosphorus release were studied by means of soil column leaching experiment. Through process analysis, the mechanism of water and fertilizer retention was discussed. The results showed that water retaining agent had the most obvious effect on soil water conservation, and zeolite had the best effect on nitrogen retention and phosphorus fertilizer activation. In a certain range, the effect increased with the increase of the amount of water absorbent, when the amount of water absorbent was 2 g 路kg ~ (-1), the effect of water retaining agent was 2 g 路kg ~ (-1). Compared with CK, the leaching amount of soil water was decreased by 4.4%, the amount of humic acid was 1.0 g 路kg ~ (-1), the amount of nitrogen leaching was 17.4% lower than CK, the amount of zeolite was 12 g 路kg ~ (-1), the amount of phosphorus leaching increased 68.0% compared with CK, the content of zeolite was 9 g 路kg ~ (-1). Compared with CK, the amount of soil nitrogen leaching was reduced by 25.1%, and the amount of phosphorus leaching increased by 29.2%. The results showed that the application of three kinds of environmental materials had obvious enhancement effect on soil water and fertilizer retention.
【作者单位】：中国矿业大学(北京)化学与环境学院;北京首创环境投资有限公司;
【基金】：国家自然科学基金项目(41571303) 三峡后续工作科研课题项目(2015HXKY2-4) 中央高校基本科研业务费专项资金项目(2016QH02) 北京市自然科学基金项目(8152025)~~
【分类号】：S15

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