摘要
1 引言 国内外众多的试验表明,VA菌根真菌侵染植物根系后,促进植物对养分吸收和物质转化,从而大幅度增加寄主生物量,但也有试验表明,接种VAMF后,寄主生物量并无明显增加,这可能与菌根接种物本身的特点及外界条件有关,其中土壤中磷的含量是重要因素之一。据报道,土壤P过高,对菌根的形成有影响。本文就刺槐接种VAMF,在不同立地环境下寄主生长变化及不同施磷量对VAMF侵染能力、孢子产生量、植株生物量等进行了研究。
After inoculated with vesicular-arbuscular mycorrhizal fungus(VAMF),the growth of R. pseudoacacia,its infection ability and spore number are varied with soil condition and phosphorus application rate. In a pot experiment applicated with P, the host plant biomass and infection rate are higher when the total P content in soil is 0.073％, but decreased markedly,when the P content is up to 0.08％. More spores are found at 4—6cm depth of rhizosphere soil when the soil total P content is 0.076％. In an inoculated drab soil, the infection rate of seedlings at 3 months old is 65.8%, but their biomass is not significantly increased. After forestation with inoculated seedlings on an infertile hilly land, the biomass of host plant at 5 months old is increased by 17.6%.
出处
《应用生态学报》
CAS
CSCD
1992年第4期389-391,共3页
Chinese Journal of Applied Ecology
基金
国家"七五"攻关项目
关键词
刺槐
VA菌根真菌
环境效应
接种
Robinia pseudoacacia, Vesicular-arbuscular mycorrhizal fungus, Inoculation test, Environmental effect.
