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Position: Home > Articles > Occurrence and Economic Control Threshold of Weeds in Wheat in the Guanzhong Irrigation Area of Shaanxi Province Journal of Weed Science 2021 (1) 38-42

陕西关中灌区麦田杂草发生规律及防治指标

作者：

郭云忠;胡杰;李思娟;闫明杰;李文文;胡小平

单位：

旱区作物逆境生物学国家重点实验室/西北农林科技大学植物保护学院

关键词：

关中灌区;麦田杂草;发生规律;防治指标;杂草密度

摘要：

通过田间调查和资料分析,对陕西关中灌区小麦田杂草的种类、出苗规律和防治指标进行研究。结果表明,关中灌区小麦田杂草有15种,隶属8科15属,其中优势杂草有播娘蒿、荠菜、婆婆纳、猪殃殃、节节麦等5种,一般杂草有野燕麦、宝盖草、田紫草等3种,其余为区域性杂草。小麦播种后5 d陆续有杂草出土,在11月上中旬(小麦3～4叶期),占总草91%的杂草均已出苗,是生产中防治用药的最适宜时间。关中灌区麦田杂草密度(x)与小麦产量损失率(y)呈极显著正相关关系(r=0.992 0),其关系式为y=0.166 0x-0.906 7。按照目前关中灌区小麦的产量、价格、除草成本及效果,在本研究的草相条件下杂草的防治指标为30株/m~2,应在冬前小麦3～4叶期进行防除。

译名：

Occurrence and Economic Control Threshold of Weeds in Wheat in the Guanzhong Irrigation Area of Shaanxi Province

作者：

GUO Yun-zhong;HU Jie;LI Si-juan;YAN Ming-jie;LI Wen-wen;HU Xiao-ping;State Key Laboratory of Crop Stress Biology in Arid Areas,College of Plant Protection,Northwest A&F University;

关键词：

Guanzhong irrigation area;;weeds in wheat fields;;regularity of occurrence;;economic threshold;;weed density

摘要：

Wheat fields in Guanzhong irrigation area were survey to determine weed species, emergence patterns and control indexes. There were 15 weedspeciesbelonging to 15 genera and 8 families, among which five were dominant: Descurainia sophia,Capsella bursa-pastoris,Veronica didyma,Euphorbia pulcherrima and Aegilops tauschii;three were considered common(Avena fatua,Lamium amplexicaule and Buglossoides arvensis,and the rest were regional weeds. All weeds basically emerged at the same time when wheat was at the 3～4 leaf stage, accounting for 91% of the total grass, which is the most suitable time for prevention and treatment in production. Weed density positively correlated(r=0.992 0) with wheat yield loss rate in Guanzhong irrigation area, a relationship described by a linear relationship(y=0.166 0x-0.906 7). According to current yield, price, weeding cost and effect of wheat in Guanzhong irrigation area, it is proposed that the weed control index is 30 plants/m~2,which should be controlled at the 3～4 leaf stage of wheat before winter.

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陕西关中灌区麦田杂草发生规律及防治指标

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