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通过田间试验研究了留茬10 cm、20 cm和40 cm刈割对红三叶生长特性、净光合速率和PSII最大光化学效率的影响。结果表明,留茬20 cm刈割红三叶叶片净光合效率较高、有效光合时间较长,分蘖数居中、分枝数多,总产量高,有利于红三叶的持续生产。综合分析认为,20 cm为红三叶的适宜刈割高度。
The effects of 10 cm, 20 cm and 40 cm mulching on the growth characteristics, net photosynthetic rate and maximum photochemical efficiency of PSII in red clover were studied by field experiments. The results showed that leaves of 20 cm mulched red clover had higher photosynthetic efficiency, longer photosynthetic efficiency, longer tillers, more branches and higher total yield, which was in favor of the continuous production of red clover. Comprehensive analysis shows that 20 cm for the red clover suitable cutting height.