目的探讨人参连作障碍的内外在因素作用机制。
It was suggested that inoculation of P. chrysosporium had definite effect in overcoming the continuous cropping obstacle of cucumber.表明施入黄孢原毛平革菌剂对黄瓜连作障碍的解除具有一定的效果。
The nitrogen contents and nitrogen forms were studied in albic soil with longterm crop rotation and soybean, maize, wheat continuous cropping.对轮作及大豆、玉米、小麦长期连作白浆土中氮含量及有机态氮组分变化进行研究。