绿洲灌区小麦秸秆还田与耕作措施对玉米产量的影响

被引:26
作者
王玉珑
于爱忠
吕汉强
王琦明
苏向向
柴强
机构
[1] 甘肃省干旱生境作物学重点实验室/甘肃农业大学农学院
关键词
免耕; 秸秆还田; 轮作; 产量;
D O I
暂无
中图分类号
S513 [玉米(玉蜀黍)]; S141.4 [堆肥、沤肥];
学科分类号
090104 [作物信息科学与技术]; 090301 [土壤学];
摘要
针对西北干旱绿洲灌区玉米长期连作导致其产量提高受限的关键问题,基于田间定位试验,研究了秸秆还田/秸秆不还田和耕作措施(传统翻耕、免耕)对玉米产量的影响。结果表明,前茬小麦秸秆还田和耕作措施对玉米干物质积累量与叶面积指数均有显著影响,且二者的互作效应显著。从玉米全生育期平均来看,秸秆还田较秸秆不还田显著提高了玉米干物质积累量与叶面积指数,分别提高4.2%~8.2%和7.1%~13.0%;与免耕处理相比,传统翻耕显著提高了玉米干物质积累量与叶面积指数,分别提高20.2%~24.1%和11.0%~16.0%。秸秆还田和耕作措施对玉米籽粒产量及产量构成因素影响显著,但二者的互作效应不显著。秸秆还田较秸秆不还田、传统翻耕较免耕玉米籽粒产量分别提高21.9%和20.0%,其主要原因是提高了穗数。因此,在干旱绿洲灌区小麦秸秆还田结合传统翻耕有利于提高玉米叶面积指数,促进干物质积累,进而提高玉米籽粒产量。
引用
收藏
页码:2671 / 2679
页数:9
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