| 麦田混生杂草生态经济阈值的研究 |
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| 引用本文： | 于金凤,王金信,陈茂学,朱贤才.麦田混生杂草生态经济阈值的研究[J].植物保护,2002,28(5):13-15. |
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| 作者姓名： | 于金凤 王金信 陈茂学 朱贤才 |
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| 作者单位： | 山东农业大学农学院,山东泰安,271018 |
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| 摘 要： | 1999～2000年于山东农业大学实习农场对小麦田的荠菜、播娘蒿、麦瓶草等主要杂草混合生长的危害及生态经济防除阈值进行了研究 ,得出如下结论 :麦田主要杂草持续生长对小麦产量有显著影响 ;小麦产量损失率(y)与杂草密度(x)之间呈幂函数关系 ,即y=0.0077x1.6565。随着杂草密度的提高 ,单位面积小麦穗数和千粒重明显降低 ,穗粒数则无显著差异
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| 关 键 词： | 小麦 麦田混生杂草 生态经济阈值 |
| 文章编号： | 0529-1542(2002)05-0013-03 |
| 修稿时间： | 2001年10月24 |
Studies on eco-economic thresholds of mixed-growing weeds in wheat fields |
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| YU Jin-feng;WANG Jin-xin;CHEN Mao-xue;ZHU Xian-cai.Studies on eco-economic thresholds of mixed-growing weeds in wheat fields[J].Plant Protection,2002,28(5):13-15. |
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| Authors: | YU Jin-feng;WANG Jin-xin;CHEN Mao-xue;ZHU Xian-cai |
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| Institution: | College of Agronomy;Shandong Agricultural University;Taian 271018;China |
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| Abstract: | The damages and eco-economic thresholds of mixed-growing weeds, Capsella bursa-pastoris (L.) Medik, Descurainia sophia (L.) Webbn ex Prantl and Silene conoidea L. were studied on the practice farm of Shandong Agricultural University in 1999-2000. The results showed the effect of mixed-growing weeds in wheat yields was significant. The relation between wheat yield loss rate (y) and mixed-growing weed density (x) was simulated with the model: y=0.007 7 x 1 656 5 . Further studies indicated that weed density was significant to related spike number per 667 m 2 and every thousand kernel weight, but not to grain number per spike. |
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| Keywords: | wheat wheat mixed-growing weed eco-economic threshold |
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