摘要
研究刈割强度对羊草草原生长性能的影响。结果表明:随着刈割强度的增大,地上现存量呈连续下降趋势,群落和羊草变化趋势相同;处理间生长量和生长速率均呈单峰型变化;生长速率对留茬高度的响应为二次曲线形式;相对生长速率在处理间差异不显著;本文参照生长速率的二次曲线形式,以留茬15 cm(D 1)作为刈割强度的参数。
An experiment was carried out to study the effect of cutting intensity on the growth capability of Leymus chinensis （Trin.） Tzvel. and the vegetative community on L. chinensis grassland. The results showed that the aboveground standing biomass of both vegetative community and L. chinensis decreased along with the increased cutting intensity. Treatments resulted in the similar changes in regrowth biomass and regrowth rate with one-peak dynamics. The response of regrowth rate of community and L. chinensis to cutting height followed the conic format. The relative regrowth rates of community and L. chinensis under different treatments had no significant differences. Based on the analysis of the relationship between regrowth rate and cutting height, the optimum cutting height was at 15 centimeter.
出处
《草地学报》
CAS
CSCD
2007年第3期263-268,共6页
Acta Agrestia Sinica
基金
国家科技攻关项目(2004BA528B-1-4)
国家科技支撑计划项目(2006BAD16B05)资助
关键词
羊草草原
群落
刈割强度
留茬高度
生长性能
Leymus chinensis grassland
Community
Cutting intensity
Cutting height
Growth capability
