氮肥运筹模式对小麦茎秆抗倒性能的影响

被引：142

作者：

魏凤珍

李金才

王成雨

屈会娟

沈学善

机构：

[1] 安徽农业大学农学院

来源：

作物学报 | 2008年 / 06期

基金：

安徽省自然科学基金;

关键词：

冬小麦; 氮肥运筹模式; 抗倒性能; 茎秆抗倒指数;

D O I：

暂无

中图分类号：

S512.1 [小麦];

学科分类号：

0901 ;

摘要：

以高产强筋小麦品种烟农19为试验材料,通过不同施氮水平(202.5、270.0和337.5kghm-2)和不同基追比例的施肥试验,对小麦茎秆结构和细胞壁化学成分及茎秆抗倒指数(CLRI,茎秆机械强度/茎秆重心高度)等生理生化指标进行了研究。结果表明,氮肥运筹模式显著影响小麦茎秆抗倒能力。基部节间长度和含氮量均随施氮水平和基肥比例的增加而增加,基部节间粗度、秆壁厚度、节间充实度、机械强度则表现相反。而细胞壁纤维素、木质素含量和CLRI则随施氮水平的增加呈现出先增后降的趋势,但随基肥比例的增加而下降。CLRI与基部节间粗度、壁厚、充实度及机械强度呈极显著正相关,而与基部节间长度和氮含量呈极显著负相关。CLRI可作为小麦抗茎倒伏能力的综合评价指标。

引用

页码：1080 / 1085

页数：6

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