磷对小麦利用土壤深层累积硝态氮的影响

被引:23
作者
袁丽金 [1 ]
巨晓棠 [2 ]
张丽娟 [1 ]
王珏 [1 ]
刘新宇 [1 ]
机构
[1] 河北农业大学资源与环境学院
[2] 中国农业大学资源与环境学院
关键词
15N; 磷; 小麦; 硝态氮; 氮素利用率;
D O I
暂无
中图分类号
S512.1 [小麦];
学科分类号
0901 ;
摘要
【目的】在粮食主产区华北平原,研究磷对小麦利用土壤深层累积硝态氮的影响。【方法】采用15N微区注射技术,布置田间微区试验,将15N标记于110cm土层处。【结果】在本试验条件下,小麦能够利用注射并扩散于100~120cm土壤层次的标记硝态氮,3种磷水平的利用率分别为6.8%、16.4%和11.2%;耕层施用磷肥有利于小麦地下部根系发育,根长密度及根干重较不施磷均有增加,提高了小麦对深层硝态氮的利用,耕层适量供磷有利于小麦对土壤剖面深层标记硝态氮的吸收利用。【结论】磷促进小麦根系发育,提高小麦对土壤深层累积硝态氮的利用,过量施磷起抑制作用。
引用
收藏
页码:1665 / 1671
页数:7
相关论文
共 28 条
[1]   燕麦根系对缺磷胁迫的适应性反应 [J].
高利平 ;
乌兰巴特尔 ;
樊明寿 .
中国农学通报, 2006, (11) :221-223
[2]   华北太行山前平原农田土壤水分动态与氮素的淋溶损失 [J].
张玉铭 ;
张佳宝 ;
胡春胜 ;
李晓欣 ;
朱安宁 .
土壤学报, 2006, (01) :17-25
[3]   灌水和施磷对冬小麦根系的影响 [J].
兰霞 ;
周殿玺 ;
兰林旺 .
农业与技术, 2005, (02) :154-156
[4]  
Subsoil nitrogen capture in mixed legume stands as assessed by deep 15N placement. Gathumbi,S.M.,Cadisch,G.,Buresh,J.R.,Giller,K.E. Soil Science Society of America Journal . 2003
[5]  
Site-specific nitrogen management of irrigated maize:Yield and soil residual nitrate effects. Ferguson R B,Hergert G W,Schepers J S,Gotway C A,Cahoon J E,Peterson T A. Soil Science Society of America Journal . 2002
[6]   Nitrate pollution of groundwater in northern China [J].
Zhang, WL ;
Tian, ZX ;
Zhang, N ;
Li, XQ .
AGRICULTURE ECOSYSTEMS & ENVIRONMENT, 1996, 59 (03) :223-231
[7]  
Nitrogen fertilizer use in China – Contributions to food production, impacts on the environment and best management strategies[J] . Z.L. Zhu,D.L. Chen. &nbspNutrient Cycling in Agroecosystems . 2002 (2)
[8]   Recovery of 15N-labelled fertilizer applied to winter wheat and perennial ryegrass crops and residual 15N recovery by succeeding wheat crops under different crop residue management practices [J].
Kumar, K ;
Goh, KM .
NUTRIENT CYCLING IN AGROECOSYSTEMS, 2002, 62 (02) :123-130
[9]  
The fate of residual 15 N-labelled fertilizer in arable soils: its availability to subsequent crops and retention in soil[J] . A.J. Macdonald,P.R. Poulton,E.A. Stockdale,D.S. Powlson,D.S. Jenkinson. &nbspPlant and Soil . 2002 (1)
[10]  
Increased nitrogen use efficiencies as a key mitigation alternative to reduce nitrate leaching in north china plain[J] . Xiaoxin Li,Chunsheng Hu,Jorge A. Delgado,Yuming Zhang,Zhiyun Ouyang. &nbspAgricultural Water Management . 2007 (1)