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中国农学通报

中国农学通报 ›› 2009, Vol. 25 ›› Issue (10): 207-211.

所属专题： 玉米

• 植物保护 农药 • 上一篇    下一篇

不同耕作方式对玉米田杂草发生规律及产量的影响

樊翠芹,王贵启,李秉华,许贤   

  • 收稿日期:2009-02-16 修回日期:2009-03-18 出版日期:2009-05-20 发布日期:2009-05-20

Effects of Different Tillage Methods on Weed Dynamics and Yield in Corn Field

FAN Cui-Qin , , ,   

  • Received:2009-02-16 Revised:2009-03-18 Online:2009-05-20 Published:2009-05-20

PDF (PC)

878

摘要： 摘要：研究了小麦－玉米一年两熟制农田，在免耕覆盖麦秸、免耕、旋耕三种耕作方式下，玉米田杂草发生规律、喷施玉农乐对杂草的防除效果及对玉米产量的影响。结果表明：不同耕作方式杂草种类差异不大，免耕覆盖麦秸的杂草数量比免耕不覆盖的降低53％-82％，比旋耕的降低了62％-78％。玉农乐30g/hm2处理，免耕覆盖麦秸的防效最好，免耕不覆盖和旋耕田差异不大；玉米田免耕覆盖麦秸，能降低玉农乐的用药量。免耕覆盖麦秸玉米出苗率降低，但是穗粒数、百粒重及产量增加；玉农乐45-60g/hm2处理，不同耕作方式中其产量差异不大；玉农乐30g/hm2处理和对照小区的产量，免耕覆盖麦秸的最高。

关键词: 农业气象灾害, 农业气象灾害, 变化特征, 防灾措施

Abstract: Abstract: Field experiment was conducted to study effects of different tillage methods on weed dynamics and weeds control efficiency of nicosulfuron spraying in 2-4 leaf stage of weed and yield of corn in wheat-maize double cropping system. The results showed that weed communities had little different in different tillage methods. The numbers of weed reduced 53%-82% comparing with the plot of wheat stalk-covering and no tillage, and reduced 62%-78% comparing with the plot of wheat stalk-covering and rotary tillage. At the rate of 30g/hm2 of nicosulfuron weeds control efficiency in wheat stalk-covering was the best in three tillage methods. The emergence percentage of corn were lower in wheat stalk-covering than that in no tillage and rotary tillage, but it’s seeds per ear , 100-seeds weight and the yield of corn were higher. At the rate of 45-60g/hm2, the yield of corn had little different in different tillage methods. At the rate of 30g/hm2 of nicosulfuron and CK, the yield of corn in wheat stalk-covering was the highest in different tillage methods.