放牧制度对短花针茅草原主要植物种群繁殖特征的影响

Effects of Grazing Systems on the Reproductive Feature of Key Plant Population in Stipa breviflora Steppe

本文对短花针茅荒漠草原划区轮牧与自由放牧条件下主要植物种群的繁殖特性进了比较分析。结果表明 ,划区轮牧与自由放牧相比有利于短花针茅生殖枝的形成 ,且能够产生较多的种子 ;划区轮牧有利于主要植物种群实生苗的存活 ,但禁牧条件下对实生苗的生长更有利 ;短花针茅草原主要植物种群以无性繁殖为主 ,有性繁殖机会较少 。

The comparative study on the reproductive feature of key plant populations under rotational grazing and continuous grazing was conducted in Stipa breviflora desert steppe.The results showed that more reproductive heads and more seeds were produced in rotational grazing than in continuous grazing. It was benefit to survival and growth of seedling of key plants in rotational grazing, but not effective as in exclosure. The vegetative propagation was more popular than seed reproduction that was affected by pr...