Tillage, fertiliser and glyphosate timing effects on foxtail barley (Hordeum jubatum) management in wheat

文献类型： 外文期刊

第一作者： Blackshaw, RE

作者： Blackshaw, RE;Semach, G;Li, X;O'Donovan, JT;Harker, KN

作者机构：

关键词： foxtail barley;Hordeum jubatum;glyphosate;integrated weed management;nitrogen placement;zero tillage

期刊名称：CANADIAN JOURNAL OF PLANT SCIENCE （ 影响因子：1.018； 五年影响因子：1.242 ）

ISSN： 0008-4220

年卷期： 2000 年 80 卷 3 期

页码：

收录情况： SCI

摘要： Foxtail barley (Hordeum jubatum L.) is becoming a more severe weed problem as conservation tillage becomes widely adopted on the southern Canadian prairies. A 5-yr field study was conducted to determine the combined effects of tillage, N rate, N placement and application timing of glyphosate to manage foxtail barley in spring wheat. Wide-blade tillage conducted in fall and spring, compared to zero-till, reduced foxtail barley biomass and seed production in all yr and increased wheat yield in 4 of 5 yr. Foxtail barley was highly competitive with wheat for added N. N fertiliser placed mid-row in 10-cm-deep bands reduced foxtail barley growth in 2 of 5 yr and increased wheat yield in 3 of 5 yr compared with soil surface broadcast N. Wheat yield sometimes was similar when N was banded at 60 kg ha(-1) or broadcast at 120 kg ha(-1), indicating the large advantage of banding N in some situations. Glyphosate at 800 g ha(-1) applied preharvest or postharvest gave similar levels of foxtail barley control in 2 of 3 yr. Results indicate that foxtail barley can be adequately managed in wheat production systems utilizing conservation tillage.

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