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本实验于 1996年在美国德克萨斯理工大学草原、野生动物和渔类系的温室和实验室中进行 .实验材料均为盆栽小糠草 .实验设计为在自然光照下 (R/FR =1.1) ,以不同留茬高度 (10、15、2 0cm和不刈割 )作为不同刈割强度 ;用不同红光 /远红光比例 (R/FR =1.3和 0 .7)处理不同刈割强度的小糠草 ,观测不同处理对小糠草无性繁殖特性的影响 .结果表明 ,小糠草净增蘖数随刈割强度增加而减少 ;除不刈割处理外 ,光照质量变化 (R/FR的比例 )对分蘖性能影响不大 .所有刈割强度下都不存在分蘖的补偿性生长效应 ,但幼叶伸长速度随刈割强度的增大而加快 .可以认为小糠草应适度利用 ,强度利用或不利用均不利于该草生长发育 .
The experiment was carried out in the greenhouse and laboratory of grassland, wildlife and fisheries of Texas Tech University in 1996. The experimental materials were potted whitefly grass.The experiment was designed under natural light (R / FR = 1.1), with different stubble height (10,15,2 cm and no cutting) as different cutting strength; different cutting with different red / far red light ratio (R / FR = 1.3 and 0.7) The results showed that the net tiller number decreased with the increase of mowing intensity. In addition to the mowing treatment, the light quality (R / FR ratio) had little effect on tillering performance, and no tillering compensatory growth effect existed at all cutting strengths, but the young leaf elongation speed increased with the increase of cutting strength.Furthermore, Intensity or non-utilization are not conducive to the grass growth and development.