| 耕作方式对夏玉米地杂草关键无草期的影响 |
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| 引用本文： | 薛敬哲,郝春新,倪汉文.耕作方式对夏玉米地杂草关键无草期的影响[J].植物保护,2010,36(2). |
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| 作者姓名： | 薛敬哲 郝春新 倪汉文 |
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| 作者单位： | 中国农业大学农学与生物技术学院,北京,100193 |
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| 摘 要： | 在河北省夏玉米地调查了免耕地和常规翻耕地条件下杂草出苗和发生的情况,比较了这两种耕作方式的关键无草期。免耕地杂草出苗较常规耕地略有延后,但很快便趋于一致,两种耕作方式下杂草结束出苗的时间没有区别。耕作方式对夏玉米地关键无草期没有影响,在免耕和翻耕两种耕作方式下,玉米相对产量(RY)和苗后无草期(T)的模型为:RY=98.93×exp-0.1439×exp(-0.04031×T)],关键无草期均为玉米苗后31d。
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| 关 键 词： | 免耕 杂草 关键无草期 |
Effects of tillage systems on critical weed-free periods in summer corns |
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| Xue Jingzhe,Hao Chunxin,Ni Hanwen.Effects of tillage systems on critical weed-free periods in summer corns[J].Plant Protection,2010,36(2). |
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| Authors: | Xue Jingzhe Hao Chunxin Ni Hanwen |
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| Abstract: | Summer corns were studied in the field in Hebei province to compare weed emergence and the critical weed-free period (CWFP) between non-tillage and tillage systems. The density of weeds was higher in tillage than in non-tillage. However, the trend of weed emergence was similar between the 2 systems. Tillage system did not affect CWFP in summer corns. Relative yield (RY) of the crop and weed-free time (T) could be described with the equation RY=98.93×exp -0.143 9×exp (-0.040 31×T)]. The CWFP was 31 days after the emergence of the crop for the 2 systems. |
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| Keywords: | non-tillage weed critical weed-free period |
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