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Weeds and Management
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Weeds and Management
农田杂草与防控
Language:  Chinese and English Papers
Author:  Zhao Chaoxian
Pub. Date:  2011-01 Weight:   kg ISBN:  9787511606235
Format:  Soft Cover Pages:  459 pages
Subject:  Technology > Agriculture > Weeds
Series:   Size:  25.8 x 18.4 x 1.8 cm
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《农田杂草与防控》主要内容简介:农田杂草与农作物争肥、争水、争光,传播病虫害,分泌有毒物质,是严重威胁农作物产量和品质的一大类生物灾害。在现有防治水平下,我国农田每年杂草危害造成的直接经济损失高达900多亿元。近年来,由于农村劳动力向城镇转移、耕作制度变化、种植结构调整及除草剂的不合理使用等原因,我国农田杂草种类及群落结构发生了较大变化,杂草防控难度逐年增加,突出表现为以下三个方面






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