果岭草坪密度对盖度和光滑度的影响

Study on the influence of green turf density on coverage and smoothness

研究了果岭草坪密度不同量化指标对盖度和光滑度的影响,结果表明:随着草坪株数、叶片数、叶面积和叶面积指数增加,草坪盖度和光滑度相应增长,但当草坪盖度达91%后,株数、叶片数、叶面积和叶面积指数保持不变:草坪盖度达100%,光滑度达3.2m时,株数、叶片数、叶面积和叶面积指数合理的理论数值分别为63 277株、180 972片、1.266 8m2和1.266 8;草坪盖度达91%后,株数和叶片数量对光滑度的影响主要是增大摩擦系数,摩擦系数主要由叶片交叠所引起;盖度未能达到100%和球速或光滑度未能达到3.2 m,其原因是草坪生长不均匀和留草过高所引起;因叶片密集或盖度达100%后叶片出现交叠,光滑度受到叶片重叠严重制约时,不可再用盖度、单纯株数和叶片数作果岭草坪密度指标,应采用叶面积指数作密度指标。因此,赛前果岭疏草作业如以株数、叶片数作为密度指标,前提条件是保证100%的盖度和3.2m光滑度。疏除多余叶片数和株数后即为合理的密度,叶面积指数或叶片交叠率大于或等于1的即为多余叶片。

The effects of green turf density on green coverage and smoothness were studied with different quantitative indicators.The results showed that the turf coverage and smoothness increased with the plant number,leaf number,leaf area and leaf area index.However,they kept stable while the turf coverage reached 91%.While the turf coverage and smoothness reached 100% and 3.2 m,the theoretical plant number,leaf number,leaf area and leaf area index were 63 277,180 972,1.266 8m^2 and 1.266 8 respectively.When turf coverage went up to 91%,the influence of plant and leaf numbers on smoothness was strengthened mainly through the friction caused by leaf overlap.The reason that the coverage and smoothness could not reach 100% and 3.2m was the uneven growth and high cutting height.If the smoothness was reduced by serious blade overlap,the coverage,plant number and leaf number were not suitable as density index,and it should be replaced by the leaf area index.Therefore,if the thinning operations on green was conducted and the plant number and leaf number were used as the density index before the match,the precondition was 100% coverage and 3.2m.