Growth and competition of 14 herb species were investigated in the experimental microcoenosiums in laboratory under the following environmental factors and treatment levels: high and low fertility, clipping and un-clipping, and with and without microbial infusion. The most intense competition and the biggest difference in biomass among the species were detected in the high fertility microcoenosiums subjected to no clipping disturbance. Clippings or low fertility reduced the growth of the competitors and resulted in more even biomass distribution among the species. Successive clippings reduced the total accumulative biomass of the microcoenosiums. Microbial infusion significantly increased the growth of legume species Lotus corniculatus L. and Trifolium pratense L. The growth of Alopecurus pratensis L. was also raised by microbial infusion, whereas Dactylis glomerata L. had more biomass in without-microbial-infusion microcoenosiums than in microbial infusion ones. Most of the 14 species were not obviously affected. The positive effect of microbial infusion was more marked in the low fertility microcoenosiums.
实验群落十四种草本植物的生长和竞争研究
陈章和
（华南师范大学生物系，广州510631）
摘要：研究了高肥力和低肥力、割草和不割草、微生物接种和不接种处理对实验群落中14种常见草本植物的生长和竞争的影响.高肥力不割草的群落,不同种间的生物量差别最大,竞争最激烈; 割草和低肥力减弱竞争者的生长而导致种间生物量差异减小.多次的割草减少群落的总生物量; 微生物接种明显增加2种豆科植物百脉根(Lotus corniculatus L.)和红车轴草(Trifolium pratense L.)的生长,也有利于非豆科植物大看麦娘(Alopecurus p ratensis L.)的生长,而鸭茅(Dactylis glomerata L.)在无微生物接种的群落生物量较多,微生物接种对其他植物的生长无显著的影响.在低肥力群落,接种微生物的促进作用更加显著.
关键词： 草本植物；实验群落；生长；竞争
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