摘要
刺槐(Robinia pseudoacacia)是我国营造用材林、能源林的树种,又是豆科固氮树种。刺槐根瘤菌共生体所固定的氮,是刺槐树木生长所需氮的绝大部分。为提高刺槐固氮和增加生物量的潜力,作者探讨了生态条件对刺槐根瘤菌共生体的效应,为其广泛应用提供科学依据。
Experimental results show that:with a trace content of 10ppm N,the plant biomass isincreased by 30%,and nitrogenase activity by 30—100%.There is no nodule formed with50ppm N application.With 500ppm P and K and 10ppm trace element fertilizers,noduleformation can be promoted and plant biomass increased.The optimum range of pH for thegrowth of symbiotic system is from 6 to 7.When it is close to 8,plant biomass and nitro-genase activity are reduced.Illumination intensity and seasonal variation also affect theactivity of nitrogenase,which is high from July to September and is inhibited in October.
出处
《生态学杂志》
CAS
CSCD
北大核心
1990年第1期51-53,61,共4页
Chinese Journal of Ecology
关键词
生态环境
刺槐
根瘤菌
共生体
Robinia pseudoacacia
rhizobium
environmental factor
