不同修剪高度下日本结缕草叶面积指数与密度的关系  

Relationship between Leaf Area Index and Plant Density of Zoysia japonica Steud. under Different Trimming Heights

作　　者：何云丽[1] 苏德荣[1] 刘自学[2] 刘艺杉[2] 

机构地区：[1]北京林业大学"省部共建-森林培育与保护"教育部重点实验室,北京100083 [2]北京克劳沃草业技术开发中心,北京100029

出　　处：《草地学报》2009年第4期527-531,共5页Acta Agrestia Sinica

基　　金：国家科技支撑计划课题草坪高效低成本养护技术研究与集成示范(2006BAD16B09)

摘　　要：以日本结缕草（Zoysia japonica）为试验材料,探讨3个修剪高度条件下密度对单株叶面积和叶面积指数的影响,为进一步研究草坪草蒸散量与叶面积指数的关系提供参考。结果表明：各修剪高度条件下,结缕草单株叶面积随密度增加逐渐减小,低密度的减小速率明显大于高密度;随着密度的增加,结缕草叶面积指数增加,处理间差异显著（P〈0.05）,密度为140株/100 cm^2时最大,密度高于140株/100 cm^2开始下降。结缕草单株叶面积和叶面积指数受修剪高度影响显著（P〈0.01）,高修剪处理的单株叶面积和叶面积指数均明显高于低修剪处理,尤其在高密度区（115-145株/100 cm^2）。Leaf area index of turfgrass is an essential parameter for the study of photosynthesis, evapotranspiration, water utilization efficiency, and greenness index of turfgrass, etc. In order to provide the information on the relationship between leaf area index and evapotranspiration, the effect of plant density on the individual plant leaf area and leaf area index of Zoysia japonica Steud. was studied under three different trimming height levels. The results show that the leaf area of individual plant reduced gradually along with the increasing of plant density under the different trimming heights, and the reducing rate of low-den- sity was notably higher than that of high-density. Along with the increase of plant density, the leaf area index of Z. japonica increased and showed very significant difference among the treatments （P〈0.05） with a peak at 140 no. · 100 cm^-2 and decline at 145 no. · 100 cm^-2. The trimming height had significantly effect on the leaf area of individual plant and leaf area index of Z. japonica （P〈0.01）. The leaf area of individual plant and leaf area index of Z. japonica under high-trimming height was higher than that under low-trimming height, especially in the high plant density range of 115 to 145 no.· 100 cm^-2.

关 键 词：结缕草 密度 单株叶面积 叶面积指数 

分 类 号：S311[农业科学—作物栽培与耕作技术]