| 有机肥配施保水剂对紫色土水分入渗及氮素淋溶的影响 |
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| 引用本文： | 蒋美佳,刘晓林,冯钰梅,李凡,何秀琴,邓晓悦,李玉义,孔凡磊.有机肥配施保水剂对紫色土水分入渗及氮素淋溶的影响[J].水土保持学报,2019,33(5):99-104. |
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| 作者姓名： | 蒋美佳 刘晓林 冯钰梅 李凡 何秀琴 邓晓悦 李玉义 孔凡磊 |
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| 作者单位： | 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 |
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| 基金项目： | 国家科技支撑计划项目（2015BAC05B05）；国家重点研发计划项目（2017YFD0301704） |
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| 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。
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| 关 键 词： | 有机肥 保水剂 紫色土 水分入渗 氮素淋溶 |
| 收稿时间： | 2019/3/3 0:00:00 |
Effect of Organic Fertilizer Combined with Water-retaining Agent on Water Infiltration and Nitrogen Leaching of Purple Soil |
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| JIANG Meiji,LIU Xiaolin,FENG Yumei,LI Fan,HE Xiuqin,DENG Xiaoyue,LI Yuyi,KONG Fanlei.Effect of Organic Fertilizer Combined with Water-retaining Agent on Water Infiltration and Nitrogen Leaching of Purple Soil[J].Journal of Soil and Water Conservation,2019,33(5):99-104. |
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| Authors: | JIANG Meiji LIU Xiaolin FENG Yumei LI Fan HE Xiuqin DENG Xiaoyue LI Yuyi KONG Fanlei |
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| Institution: | Key Laboratory of Crop Eco-physiology and Farming System in Southwest China, College of Agronomy, Sichuan Agricultural University, Chengdu 611130 |
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| 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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| Keywords: | organic fertilizer water retaining agent purple soil water infiltration nitrogen leaching |
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