摘要
本文以正红6号和川单15号为材料,探讨了攀西地区玉米群体的密度效应。结果表明:玉米产量与群体密度之间遵循等比型产量—密度方程Y=aXe-bx,正红6号和川单15号在攀西地区的最适种植密度分别为8 95和9 86株/m2;川单15号的耐密性较正红6号稍强。攀西地区玉米库容的增长对提高产量的作用较大,吐丝后干物质积累量对产量形成的贡献大于吐丝前。
The effects of density on growth and yield of maize in Panxi region were studied with maize hybrid Zhenghong 6 and Chuandan 15. The results indicated that the relationship between grain yield and planting density fitted the regression equation Y=aXe^(-bx).The optimal densities of Zhenghong 6 and Chuandan 15 were 8.95 and 9.86 plants/m^2,respectively,in the region.The density-tolerance of Chuandan 15 was better than that of Zhenghong 6.In Panxi region,the population sink of maize was more important to yield increase,however,the contribution of dry matter accumulation to yield after silking date was larger than that before silking date.
出处
《西南农业学报》
CSCD
2004年第1期26-30,共5页
Southwest China Journal of Agricultural Sciences
基金
四川省科技厅重点资助项目"攀西地区农业优质高效持续发展关键技术的研究与示范"(02NG020 003)
