河套灌区向日葵间作白花草木樨产量优势研究

对向日葵与白花草木樨的三种间作方式进行了农田生态学方面的研究,以探讨间作方式的产量优势及可行性.结果表明,向日葵间作白花草木樨群体层次中,光和叶面积的分布皆呈补偿性,消光系数低于单作.系统中小气候得到改善,土壤氮素呈良性循环,土壤盐分下降,总产值提高.

A Study on the Yield Advantage of Intercropping Sunflower with Sweetclover (Melilotus Albus Desr.) in Irrigation Area of Hetao

Field ecology of three intercropped sunflower with sweetclover patterns was studied in 1987 in Wuyuan County,to inquire into the feasibility of practice and the yield advantage of intercropping patterns.The results indicaded that there was a mutual compensation of leaf dispersion and light distribution in intercropping colony,extinction coefficient was lower than in sole cropping. In these intercropping systems the microclimate was improved,the soil nitrogen cycle was very well, the soil salinity daclined, and the gross output value was raised. So these intercropping patterns could be adapted to improve land ecological environment and to develop livestock farming in this area.