Effects of Density on Canopy Structure and Yield of Kidney Bean-Corn Intercropping Pattern
Effects of density on canopy structure and yield of kidney bean were studied based on the kidney bean-corn intercropping pattern in Panxi region. The results indicated that different density had a significant influence on the field microclimate of kidney bean population in the middle and late period. With the increasing of density, the air relative humidity increased gradually but the temperature decreased gradually. The concentration of carbon dioxide of the upper layer of canopy decreased while the concentration of carbon dioxide of the lower layer of canopy increased. With the increasing of density, the transmittance of bottom leaves decreased, the leaf area index ( LAI) increased , the peak of LAI appeared earlier and the duration of peak became shorter and the its descending speed became faster. The yield was increased in a certain range with the increasing of planting density but decreased beyond this range. The results showed the planting density of 15. 6 x 104 plant/hm2 could not only provide a good guarantee for the growth and development of individual plant, the ventilation and light penetration for the whole population, but also obtain the high yield by realizing best configuration of yield components and making full use of land capability and space. Therefore the suitable density of kidney bean-corn intercropping pattern in Panxi region was 15. 6 x 10 plant/hm .
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万方数据
维普
