中耕方式对土壤理化特性及玉米生长发育影响研究Ⅰ.中耕方式对玉米生长发育的影响

2002～2003年在0～3次中耕条件下研究了中耕方式对玉米生长发育和产量形成的影响。结果表明,多次中耕增大了玉米倒伏率,降低了玉米最大叶面积指数、株高及各时期叶片叶绿素含量,对花粒期玉米净光合速率、气孔导度、蒸腾速率也产生一定的负面影响。少中耕有增产的趋势,并且可以降低生产成本、增加经济效益。

Effects of Different Styles of Inter-tillage on the physicochemical properties of Soil and Growth Development of Maize Ⅰ. Effects of Different Styles of Inter-tillage on Growth Development of Maize

The effects of different styles of inter-tillage on maize growth development and yield formation were studied in 2002 - 2003. The result showed that lodge ratio of maize increased and maximum leaf area index, plant height and leaf chlorophyll concentration decreased under multi-tillage. In addition, inter-tillage had negative effect on net photosynthetic rate, gas diffusion conductivity of leaf and transpiration rate of maize from anthesis to mature. Furthermore, the grain yield was higher under minimum tillage than that under multi-tillage, thus minimum tillage reduced costs and increased economic benefits.