Effect of Organic Fertilizer Combined with Water-retaining Agent on Water Infiltration and Nitrogen Leaching of Purple Soil

JIANG Meijia; LIU Xiaolin; FENG Yumei; LI Fan; HE Xiuqin; DENG Xiaoyue; LI Yuyi; KONG Fanlei

doi:10.13870/j.cnki.stbcxb.2019.05.015

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Effect of Organic Fertilizer Combined with Water-retaining Agent on Water Infiltration and Nitrogen Leaching of Purple Soil

更新时间：2025-03-12

- Effect of Organic Fertilizer Combined with Water-retaining Agent on Water Infiltration and Nitrogen Leaching of Purple Soil
- Vol. 33, Issue 5, Pages: 99-104(2019)
- 作者机构：
  
  四川农业大学农学院, 农业部西南作物生理生态与耕作重点实验室,成都,611130
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2019.05.015
  CLC：
- Published：2019
- 稿件说明：
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JIANG Meijia, LIU Xiaolin, FENG Yumei, et al. Effect of Organic Fertilizer Combined with Water-retaining Agent on Water Infiltration and Nitrogen Leaching of Purple Soil[J]. 2019, 33(5): 99-104.
DOI：

JIANG Meijia, LIU Xiaolin, FENG Yumei, et al. Effect of Organic Fertilizer Combined with Water-retaining Agent on Water Infiltration and Nitrogen Leaching of Purple Soil[J]. 2019, 33(5): 99-104. DOI： 10.13870/j.cnki.stbcxb.2019.05.015.

摘要

以有机肥、保水剂（聚丙烯酰胺PAM、高分子吸水树脂SAP和沃特）为供试材料，通过室内土柱模拟试验，研究有机肥配施保水剂对紫色黏土水分入渗及氮素淋溶的影响。结果表明：有机肥配施保水剂可有效增加土壤的保水保肥能力，是控制土壤水分和养分淋失的有效措施。单施有机肥和有机肥配施保水剂均降低了湿润锋运移深度和入渗速率。与对照相比，单施有机肥和有机肥配施保水剂处理的湿润锋运移深度降低了33.33%~46.49%，入渗速率降低了22.73%~31.82%，累计淋溶液体积降低了1.25%~6.78%。施用有机肥有一定增肥保肥能力，但随淋洗次数增加保肥能力逐渐降低，与对照相比，在持续淋溶条件下单施有机肥的硝态氮和全氮累计损失率分别升高了12.00%，17.51%。有机肥配施保水剂可有效减少氮素淋失量，降低氮素淋失率，提高土壤保肥能力。与施用有机肥相比，有机肥配施保水剂硝态氮损失率降低了35.49%~78.46%，全氮损失率降低了35.53%~71.85%，其中有机肥配施PAM处理保水保肥效果最好。

Abstract

Using organic fertilizer

water-retaining agent (polyacrylamide PAM

polymer water-absorbent resin SAP and Water) as test materials

the effects of organic fertilizer combined with water-retaining agent on water infiltration and nitrogen leaching of purple soil were studied through indoor soil column simulation test. The results showed that organic fertilizer combined with water-retaining agent could effectively increase soil water and fertilizer retention capacity

and was an effective measure to control soil water and nutrient leaching. Single application of organic fertilizer and application of organic fertilizer combined with water-retaining agent both could reduce the wetting front migration depth and infiltration rate. Compared with the control

the wetting front migration depth of the above two treatments decreased by 33.33%~46.49%

the infiltration rate decreased by 22.73%~31.82%

and the cumulative leaching solution volume decreased by 1.25%~6.78%. The application of organic fertilizer had a certain fertilizer-preserving ability

but the fertilizer-retaining capacity gradually decreased with the increasing of leaching times. Compared with the control

the cumulative loss rates of nitrate nitrogen and total nitrogen increased by 12.00% and 17.51%

respectively

under continuous leaching. Organic fertilizer combined with water-retaining agent could effectively reduce nitrogen leaching amount and nitrogen leaching rate

and improve soil fertility retention capacity. Compared with the application of organic fertilizer

the nitrate loss rate and the total nitrogen loss rate of organic fertilizer combined with water retention agent treatment decreased by 35.49%~78.46% and 35.53%~71.85%

respectively. Among them

organic fertilizer combined with PAM had the best effect of water retention and fertilizer retention.

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