| 水直播稻田稗、水莎草的危害损失与复合防除指标 |
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| 引用本文： | 管丽琴,陈建生,陈根兴,程梅初,沈其龙,张颂函. 水直播稻田稗、水莎草的危害损失与复合防除指标[J]. 上海农业学报, 2001, 17(2): 79-81 |
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| 作者姓名： | 管丽琴 陈建生 陈根兴 程梅初 沈其龙 张颂函 |
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| 作者单位： | 1. 上海市嘉定区农业技术推广服务中心,
2. 上海市农药检定所, |
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| 摘 要： | 在稗、水莎草自然混生条件下对水直播稻产量损失测定的基础上，建立了水稻产量损失预测模型：Y＝368．8362－8．4888X1－0．3524X2，并进一步推导出5种不同除草措施的经济阈值，提出相应的复合防除指标，即水直播稻田杂草密度分别达到稗1株/m^2和水莎草30株／m^2时，需用“二氯喹啉酸＋吡嘧磺隆”等除草措施进行防除。
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| 关 键 词： | 水直播稻田稗 水莎草 产量损失预测 复合防除指标 稗草 危害 |
| 文章编号： | 1000-3924(2001)02-79-03 |
| 修稿时间： | 2000-11-03 |
STUDY ON INFESTATION ,DAMAGE AND COMPLEX CONTROLTARGETS OF Echinochloa crusgalli AND Juncellus SerotinusIN WET LAND DIRECT SOWING RICE FIELDS |
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| Abstract: | Based on the determination of yield loss of wet land direct sowing rice in natural mixed occurring conditions of E.crusgalli and J.serotinus,the pr ediction model of rice yield loss(Y=368.8362 8.4888X1 0.3524X2) was established and the economic thresholds under 5 kinds of weeding measures were further derrived. Meanwhile, the corresponding complex weed control targets were advanced, i.e. weeds should be controlled by application of 50%Quinclorac + 10%Pyrazosulfuron ethyl or other weeding measures when weed densities in direct sowing rice fields reached 1 plant/m2(E.crusgalli) and 30 plants/m2(J.serotinus),respectively. |
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