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不同氮肥用量下冬小麦土壤剖面累积硝态氮及其与氮素表观盈亏的关系
引用本文:刘瑞,戴相林,周建斌,张鹏,崔亚胜,王天泰.不同氮肥用量下冬小麦土壤剖面累积硝态氮及其与氮素表观盈亏的关系[J].植物营养与肥料学报,2011,17(6):1335-1341.
作者姓名:刘瑞  戴相林  周建斌  张鹏  崔亚胜  王天泰
作者单位:1. 西北农林科技大学资源环境学院,陕西杨凌,712100
2. 户县土肥站,陕西户县,710300
3. 周至县土肥站,陕西周至,710400
基金项目:国家“十一五”科技支撑计划课题(2008BADA4B09); 国家自然科学基金项目(40773057); 西北农林科技大学创新团队项目
摘    要:以在陕西关中地区户县、周至两县连续2年的20余个3414肥料田间试验为研究对象,研究了不同施氮量下冬小麦收获后土壤2 m剖面硝态氮的分布、累积及其与土壤氮素表观盈亏量间的关系。结果表明:随着氮肥用量的提高,土壤剖面硝态氮累积量明显增加,其向土壤下层淋溶的程度也越严重;当施氮量为180~240 kg/hm2时,一些试验点的土壤氮素已经表现出盈余;当施氮量达到270~360 kg/hm2,所有试验点土壤氮素均明显盈余。不同施氮量时土壤表观氮素平衡值(施氮量与氮素携出量的差值)与土壤02 m剖面硝态氮累积量之间呈极显著正相关,说明土壤表观氮素平衡和盈亏决定了土壤剖面硝酸盐的累积状况;土壤氮素表观盈余值每增加100 kg/hm2,02 m土壤剖面硝态氮累积量增加约62.5 kg/hm2。

关 键 词:冬小麦    施氮量    土壤硝态氮    氮素表观盈亏
收稿时间:2011-04-12

Relationship between accumulated nitrate nitrogen in soil profiles and apparent nitrogen budget in winter wheat fields under nitrogen fertilization
LIU Rui,DAI Xiang-lin,ZHOU Jian-bin,ZHANG Peng,CUI Ya-sheng,WANG Tian-tai.Relationship between accumulated nitrate nitrogen in soil profiles and apparent nitrogen budget in winter wheat fields under nitrogen fertilization[J].Plant Nutrition and Fertilizer Science,2011,17(6):1335-1341.
Authors:LIU Rui  DAI Xiang-lin  ZHOU Jian-bin  ZHANG Peng  CUI Ya-sheng  WANG Tian-tai
Institution:LIU Rui1,DAI Xiang-lin1,ZHOU Jian-bin1,ZHANG Peng1,CUI Ya-sheng2,WANG Tian-tai3(1 College of Resource and Environmental Sciences,Northwest A & F University,Yangling,Shaanxi 712100,China,2 Station of Soil and Fertilizer of Huxian,Huxian,Shaanxi 710300,3 Station of Soil and Fertilizer of Zhouzhi,Zhouzhi,Shaanxi 710400,China)
Abstract:More than 20 field experiments designed with the 3414 plan were carried out in Huxian County and Zhouzhi County,Guanzhong Plain,Shaanxi during 2008 and 2009 to evaluate the nitrate nitrogen(NO3-N) accumulation in soil profiles after harvesting winter wheat;and its relationship with the apparent N budget in soil was also studied.The results show that the amounts of NO3-N accumulation in the soil profiles and their extents to leach into the deeper soil layers are increased significantly as the nitrogen fertil...
Keywords:winter wheat  N-fertilizer rate  soil NO3-N  apparent N budget in soil  
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