Allelopathic effects of winter wheat residues on germination and growth of crabgrass (Digitaria ciliaris) and corn yield

文献类型： 外文期刊

第一作者： Wang, GQ

作者： Wang, GQ;Li, BH;Blackshaw, RE

作者机构：

关键词： Allelopathy;crabgrass (Digitaria ciliaris);integrated weed management;stubble mulch;weed suppression

期刊名称：ALLELOPATHY JOURNAL （ 影响因子：0.962； 五年影响因子：0.99 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： Crabgrass (Digitaria ciliaris) is major weed in corn (Zea mays) in China Laboratory and field studies were conducted to determine the effects of winter wheat (Irilicum aestivum L.) residues on the germination and growth of this weed Under laboratory conditions, aqueous extracts of wheat shoots and roots markedly reduced its germination. The germination was inhibited more by extracts from shoots than roots and by the extracts from young seedlings than mature wheat plants. The inhibitoiy effects on weed germination varied with wheat cultivars. In corn field, crabgiass density and biomass decreased with increase in the quantity of wheat residues Wheat residue at 0 75 kg/m~2 reduced the weed density by 87 3 to 96 4% and biomass by 77 7 to 81 0% over thetwo years. Reductions in weed density and biomass in the field were likely due to the combined effects of physical suppression and allelopathy. Although germination, plant height and biomass of corn seedlings were slightly reduced in the wheat residue mulched plot, but corn yield was similar to control These findings may lead to the improvement in current weed management programme for corn in the wheat-corn rotation in China.

分类号： Q94

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