| 硬草对稻茬小麦产量损失及生态经济阈值的初步研究 |
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| 引用本文： | 尚嘉彦,刘元荣.硬草对稻茬小麦产量损失及生态经济阈值的初步研究[J].华北农学报,1993,8(1):107-112. |
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| 作者姓名： | 尚嘉彦 刘元荣 |
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| 作者单位： | 河南省农科院植物保护研究所 郑州450002
(尚嘉彦，刘元荣，李凤敏)，河南省农科院植物保护研究所 郑州450002(王健康) |
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| 摘 要： | 硬草(Sclerochloa kengiana)在一定密度范围内,密度越高,干重越大,对小麦产量损失越大.作者于1990年和1991年进行了硬草与稻茬冬小麦共生的田间试验及电算模拟研究.结果表明,硬草密度、干重、密重积与小麦产量之间的回归关系均呈幂函数关系,回归方程依次为:硬草密度与小麦千粒重、每亩穗数、每穗粒数及产量损失率间的回归关系分别为:
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| 关 键 词： | 硬草 小麦 产量 |
A Preliminary Study on the Yield Loss of Wheat Caused by Sclerochloa kengiana and the Eco- economic Threshold of Weed Control |
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| Shang Jiayan Liu Yuanrong Li Fengmin Wang Jiankang.A Preliminary Study on the Yield Loss of Wheat Caused by Sclerochloa kengiana and the Eco- economic Threshold of Weed Control[J].Acta Agriculturae Boreali-Sinica,1993,8(1):107-112. |
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| Authors: | Shang Jiayan Liu Yuanrong Li Fengmin Wang Jiankang |
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| Abstract: | Experiments were corried out during 1990 and 1991. The correlation between density, dry weight of Sclerochloa kengiana and yield economic properties of wheat were studied,and some regression models were made, Four control methods were used:artificial control, 25% chlorotoluron 0.3kg mu, 25% chlcrctoluicn10% thiobencarb (0.25 + 0.25) kg/mu,and 25% chlorotoluron + 50%devrinol (0.25 + 0.075) kg/mu.The Eco-economic thresholds of controlling schercchlca Fengiana corresponding to the four methods of weed control are 30.56 plants/m2, 18.56 plants/m2, 20 plants/m2, 21.93 plants/m2, respectively. |
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| Keywords: | Selerochloa hengiana Wheat Yield loss Eco-economic threshold |
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