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草业学报  2009 

不同坪床配比百慕大T-419的生物量和根系分布特征研究

, PP. 98-106

Keywords: 运动场草坪,坪床配比,生物量,根系分布特征,相关性

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Abstract:

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<0.01);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)。

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