不同坪床配比百慕大T-419的生物量和根系分布特征研究  

Study on biomass and root system distribution characteristics of sport turf in different substrate compositions

作　　者：黄晓露[1] 刘君[1] 杨志民[1] 

机构地区：[1]南京农业大学草坪研究与开发工程技术中心,江苏南京210095

出　　处：《草业学报》2009年第5期98-106,共9页Acta Prataculturae Sinica

基　　金：国家科技支撑计划(2006BAD01A19-4-5)资助

摘　　要：本试验采用9种不同的坪床配比，对热带亚热带运动场常用品种百慕大T-419的生物量和根系分布特征进行了研究。结果表明，各处理的地上与地下生物量变化基本一致，中等含沙量的处理Ⅲ和Ⅶ的地上与地下生物量最高。不同处理的根系分布随土壤深度的增加而减少，集中分布于0～10cm土层，方差分析表明，0～10cm土层各处理间根系生物量差异显著，其中处理Ⅲ、Ⅵ和Ⅶ显著高于处理I和对照CK，10～20和20cm以下的生物量均无显著差异。地下总生物量与总根长相关系数为0．541（P〈0．05），与根系表面积、根系体积相关系数分别为0．651和0．615（P〈C0．01）；根尖数与总根长、平均直径相关系数分别为0．500和0．695（P〈0．01）。This research used nine turf-bed compositions to analyze the biomass and root distribution characteristics of Bermuda T-419, a commonly used sports turf in the tropics and subtropics. Above and belowground biomasses of treatments showed similar changes, middle sediment treatments Ⅲand Ⅶ were highest in above and belowground biomass. Root biomasses of the different treatments were significantly reduced with soil depth, and distribution of roots was concentrated in the 0-10 cm layer. Variance analysis indicated significant differences in the 0-10 cm belowground biomass between treatments and that treatments Ⅲ, VI and Ⅶ were significantly higher than I and the CK. There were no significant differences in biomass in thel0-20 cm and below 20 cm soil layers. The correlation coefficient between belowground biomass and total root length was 0. 541 （P〈0.05）, between belowground biomass and root surface-area with root volume it was 0. 651 and 0. 615 respectively （P〈0.01） 0. 500 and 0. 695 respectively , and between root number and total root length, with average diameters it was （P〈0.01）.

关 键 词：运动场草坪 坪床配比 生物量 根系分布特征 相关性 

分 类 号：S688.4[农业科学—观赏园艺] Q945.79[农业科学—园艺学]