摘要
以白三叶为材料,研究刈割强度对白三叶生长型和生物量的影响。当白三叶株高达20 cm时,通过不割、留茬5 cm、留茬3 cm、留茬1 cm的刈割试验后发现,不同刈割留茬高度对白三叶分枝数量、匍匐茎茎长及产量影响均显著。留茬1 cm处理的一级、二级分枝数量均为最高的,分别高达20.33枝/株和50.30枝/株;其次是刈割留茬3 cm处理,分别为18.40枝/株和43.17枝/株,而三级分枝则是留茬3 cm处理数量最高,达到21.37枝/株。随着刈割强度的增加,白三叶匍匐茎茎长呈下降趋势;白三叶地上部分(叶,茎)生物量总体呈现随留茬高度降低先增加后减少的趋势,即留茬高度过高(包括不刈割)和留茬高度过低都会减低产量。表明,留茬3 cm时对白三叶的各项指标为最佳。
The results from studying the effects of different mowing intensity on growth characteristic and biomass of Trifoliurn repens, showed that the different stubble height had the significant effects on branching number, creeping stem length and biomass of Trifolium repens. The first and second branch number of the stubble with 1 cm height was 20.33 and 50.30 branches/plant, and the first and second branch number of the stubble with 3 em height was 18.40 and 43. 17 branches/plant respectively. The third branch number of the stubble with 3 cm was the highest （21.37 branches/plant）. The creeping stem length decreased with increase of mowing intensity and the aerial biomass presented the trend of first increase and then decrease with reduction of stubble height, which indicates that the higher and lower stubble height all reduces its yield. The stubble with 3 cm is beneficial to growth and biomass of Trifolium repens.
出处
《贵州农业科学》
CAS
北大核心
2009年第10期136-139,共4页
Guizhou Agricultural Sciences
关键词
白三叶
刈割强度
生长型
生物量
Trifolium repens
mowing intensity
growth characteristic
biomass
