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The characteristic of nitrogen and phosphorus absorption by winter wheat in dryland
Author(s): 
Pages: 826-830
Year: Issue:  5
Journal: ACTA BOTANICA BOREALI-OCCIDENTALIA SINICA

Keyword:  冬小麦;
Abstract: 通过田间试验,研究了不同施肥水平条件下冬小麦吸收氮、磷的营养特征.结果表明,不同施肥水平冬小麦返青前吸收氮、磷均很少,返青后迅速增多,至孕穗-灌浆初期达全生育期吸收的高峰(N0P0吸氮在拔节-孕穗阶段达高峰),且峰值随施肥水平提高而增大.灌浆以后,氮磷营养不同:氮素积累减少28.27%~31.19%,减少绝对量随前期吸氮增大而增加.相对量则是施肥略低于对照;而磷素于灌浆中期-成熟阶段还有1吸收高峰(N0P0例外),且灌浆初期至成熟阶段积累的磷素所占比值较大,呈现出中后期偏多的特点.
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