水田冬种多花黑麦草对土壤氮磷环境释放的影响

草业学报 ›› 2011, Vol. 20 ›› Issue (6): 118-125.

水田冬种多花黑麦草对土壤氮磷环境释放的影响

辛国荣^*,李剑,杨中艺

中山大学有害生物控制与资源利用国家重点实验室,中山大学生命科学学院,广东广州 510275

收稿日期:2010-10-18 出版日期:2011-06-25 发布日期:2011-12-20
通讯作者: E-mail:lssxgr@mail.sysu.edu.cn,adsyzy@mail.sysu.edu.cn
作者简介:辛国荣(1968-),男,甘肃临洮人,教授,博士。E-mail:lssxgr@mail.sysu.edu.cn
基金资助:
“十二五”农村领域国家科技计划课题(2011BAD17B02),国家自然科学基金(30871475)和珠海市科技计划(PC20061046)资助。

Effect of winter cropping Italian ryegrass on N and P leakage from soils

XIN Guo-rong, LI Jian, YANG Zhong-yi

State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China

Received:2010-10-18 Online:2011-06-25 Published:2011-12-20

摘要/Abstract

摘要： 研究以“黑麦草-水稻”草田轮作系统为基础,水田冬种多花黑麦草为研究对象,利用实验生态学的方法,通过对土壤地下渗漏水中N、P含量变化的分析,研究稻田冬种黑麦草的N、P动态,把握在种植过程中N、P向环境原位释放的数量、规律和影响因素,有利于更加客观地评价“黑麦草-水稻”草田轮作系统的环境效应。结果表明,在不施肥的冬闲田,仍可发生N素和P素的损失,一个生长周期中随土壤下渗水的损失量平均为NO₃^--N 115.98 kg/hm²,NH₄⁺-N 0.828 0 kg/hm²,P 0.028 5 kg/hm²。而冬种黑麦草降低了这种损失,其中施复合肥375 kg/hm²处理与冬闲处理相比,NO₃^--N、NH₄⁺-N和P的淋失量分别降低了49.43%,48.59%,24.11%。施肥量750 kg/hm²处理的NO₃^--N和NH₄⁺-N淋失量比冬闲处理分别降低了38.20%和15.57%,但P的淋失量比冬闲处理略高。

Abstract: Based on the construction of an Italian ryegrass-rice rotation (IRR) system, the variety and dynamics of N and P loss in underground leakage water under different experimental treatments were investigated. The average loss of N and P through leakage water in the growth cycle was 115.98 kg/ha NO₃^--N, 0.828 0 kg/ha NH₄⁺-N and 0.028 5 kg/ha P under the idle field treatment (CK). Winter cropping of Italian ryegrass reduced the loss of N and P. Winter cropping Italian ryegrass with 375 kg/hm compound fertilizer, resulted in loss reductions of NO₃^--N, NH₄⁺-N and P of 49.43%, 48.59% and 24.11%, respectively, compared to the CK. Winter cropping Italian ryegrass with 750 kg/ha compound fertilizer, resulted in loss reductions of NO₃^--N and NH₄⁺-N of 38.20% and 15.57%, respectively, while the loss of P was slightly greater than that under CK.

中图分类号:

S543⁺.606

辛国荣,李剑,杨中艺. 水田冬种多花黑麦草对土壤氮磷环境释放的影响[J]. 草业学报, 2011, 20(6): 118-125.

XIN Guo-rong, LI Jian, YANG Zhong-yi. Effect of winter cropping Italian ryegrass on N and P leakage from soils[J]. Acta Prataculturae Sinica, 2011, 20(6): 118-125.

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