花生根瘤菌数量效应与种床接种效果

RESPONSES OF PEANUT TO RHIZOBIUM NUMBERS AND SEED BED INOCULATION

本文报告了土壤中花生根瘤菌的群体数量与适宜接种量及接种方法。指出,在土壤中土著根瘤菌数每克干土>1G^4的情况下,每粒种子接种量不少于10~6活菌数和采用种床接种法是花生增产的有效技术。

Indigenous Rhizobium population in peanut production area in China was inverstigated.Greenhouse and field experiments were conducted to compare effect of applying different numbers of Rhizobium.and inoculation metheds en nodulation,N2-fixatin and yields in peanut.Peanut tested by water pot culture in greenhouse required 106 rhizobia/seed for maximun nodulation and dinitrogen fixation,and inoculated with 106 rhizobia/seed in fields,where indigenous rhizobia were less than 104/g dry soil,significantly yield increase over that of uninoculated control(0×100).Multiyear and multiloca-tion trials shown that,at the same rates of applying not less than 106 rhizobia/seed,seed bed inoculation was good as derect seed inoculation,both of which gave significantly increase in yields comparing with coating seed inoculation.Thus seed bed inoculation can be used as alternatives to seed inoculation.And the use of seed bed inoculation was discussed under unfavourable conditions for servival of rhizobial inoculants.