首页关于本刊影响因子及获奖投稿须知订阅及广告专辑与专题学术会议绿色发表通道优秀论文 
说明:
此论文已被《生态学报》录用,现已优先出版,可查看文章PDF版本!
杨世琦.基于秸秆还田条件下的黄灌区 稻旱轮作土壤硝态氮淋失特征研究.生态学报,2017,(9).http://dx.doi.org/10.5846/stxb201602020237  
基于秸秆还田条件下的黄灌区 稻旱轮作土壤硝态氮淋失特征研究
Effect of straw application to soil nitrate leaching of paddy-upland rotation in the Yellow River irrigation area
投稿时间:2016-02-02  最后修改时间:2016-10-13
DOI: 10.5846/stxb201602020237
关键词秸秆还田,黄灌区,稻旱轮作制,土壤硝态氮,淋失
Key WordsStraw application, the yellow River irrigation area, paddy-upland rotation, soil nitrate, leaching
基金项目国家水体污染控制与治理科技重大专项(2014ZX07201⁃009)
作者单位E-mail
杨世琦 中国农业科学院农业环境与可持续发展研究所农业清洁流域团队/农业部农业环境重点实验室 shiqiyang@126.com 
摘要点击次数 190
全文下载次数 47
摘要:
黄灌区是农业面源污染重点区域,地表水污染问题突出。以宁夏引黄灌区为例,区内大部分排水沟的水质为劣Ⅴ类,其主要污染物硝态氮与铵态氮。本试验设置常规施肥(CK)、常规施肥条件下施用4500kg/hm2(T1,半量还田)和9000 kg/hm2(T2,全量还田)秸秆3个处理。利用树脂芯法吸附10cm、20cm、30cm、60cm和90cm土层的硝态氮流失量,试验期2009-2013年。结果表明: 秸秆还田能够减少土壤30cm土层的硝态氮淋失。与对照硝态氮淋失量(15.76 kg hm-2)相比,T1(13.76 kg hm-2)与T2(13.74 kg hm-2)均达到显著差异(P<0.05),淋失量分别减少12.71 % 和 12.84 %,T1与T2没有达到显著差异。秸秆还田对土壤硝态氮淋失的影响效应主要体现在30cm土层处,10、20、60与90cm土层处的处理与对照都没有达到显著差异。秸秆还田提高了30cm土层的土壤有机质与土壤总氮,与对照(13.78g kg-1)相比,T1与T2土壤有机质分别提高0.89 g kg-1 和 1.24 g kg-1 ;试验结束后,对照、T1和T2的总氮是达到0.64、0.66 和 0.69 g kg-1,与对照相比,处理分别提高了2.76%和6.83%。秸秆还田有助于作物增产,T1与T2的水稻平均增产9.24%和10.37%,小麦增产10.11% 和11.51%。
Abstract:
The Yellow River irrigation area was one of the severe zones of non-point source pollution in China and the surface water is mostly polluted. In Ningxia irrigation area water quality was classified as Inferior Category V in many of drainage ditches. The main pollutants were nitrate and ammonium. A 5-year straw application trial and nitrate leaching losses had been conducted. This field experiment contained 3 treatments: tradition without rice straw (CK), tradition matched rice straw 4500kg hm-2(T1, semi) and tradition matched rice straw 9000 kg hm-2 (T2, total). Nitrate nitrogen leaching losses at 10, 20, 30, 60, 90 cm soil layers were measured by resin core method. The results indicated straw application could reduce soil nitrate leaching losses at 30 cm layer. Contrasting with CK 15.76 kg hm-2, T1 13.76 kg hm-2 and T2 13.74 kg hm-2 all reached significant differences (P<0.05), soil nitrate leaching losses were decreased 12.71 % and 12.84 %. However there were no significant differences (P>0.05) between T1 and T2. The effect of straw application only appeared in plowing layer (30 cm depth soil layer), at the deep layers (60 and 90 cm) there were no significant differences between treatments and CK, the same as in topsoil (10 and 20 cm). Straw application could increase soil organic matter (SOM) and total nitrogen (TN). SOM of T1 and T2 were increased 0.89 g kg-1 and 1.24 g kg-1 contrasting with CK (13.78g kg-1). TN of CK, T1 and T2 were 0.64, 0.66 and 0.69 at 0-30 cm layer, which were improved 2.76% and 6.83%. Straw application could increase crop yield,T1 and T2 of rice output increase 9.24% and 10.37%, and winter wheat output increase 10.11% and 11.51%.
HTML 查看全文   查看/发表评论  下载PDF阅读器

您是本站第 52046337 位访问者

Copyright © 2005-2019   京ICP备06018880号
地址:北京海淀区双清路18号
  邮编:100085    电话:010-62941099
  E-mail : shengtaixuebao@rcees.ac.cn
本系统由北京勤云科技发展有限公司提供技术支持