Abstract: Variation in reproductive characters of white clover along a degradation series of artificialgrassland was studied in Nanshan state farm, Hunan Province.Results showed:vegetative reproduction ofwhite clover was strengthened with increasing grassland degradation; meanwhile, seed rain of white cloverwas increased with grassland degradation process and was highest on the heavily degraded guassland.However, density and above-ground biomass of white clover population were decreased significantly Whilegrassland dsgradaion became more severe,just because of deterioration of soil properties.

Key words: Artificial grassland, Degradation series, White clover, Reproductive characters

摘要： 本文研究退化混播人工草地白三叶有性及无性繁殖特性的变化规律。结果表明,随着草地由轻到重的退化,白三叶无性繁殖能力则显著提高,另外单位面积种子量在重度退化地段有明显增加。但是由于土壤理化性状的变劣,白三叶种群的频度、密度和地上生物量均随着草地退化的加重而显著减少。

关键词: 人工草地, 退化系列, 白三叶, 繁殖特性