At harvest,root length density and treflan concentration at different soil layer were evaluated using soil auger method.

冬小麦收获后,采用土钻法在滴头附近沿垂直方向分层取样,测定各土层的根长密度和氟乐灵含量,并统计各小区的产量。

(2) all of biological characters, such as cormel's fresh weight, size, height, root length, roughness and root quantities, presented 1% significant difference.

(2)不同生长发育期无性繁殖的子球鲜质量、最大直径、子球高度、根系长度、根基粗度及根系数量等生物学性状均呈现1%水平极显著差异。

The result indicates that great differences,which have significant influence on the aqua-plants,exist in the evapotranspire,the bio-mass,the root density and the root length.

研究的结果表明，不同水生植物的蒸散量、生物量、根密度和根长存在较大的差异，这些差异对水生植物的泌氧性能、碎石床人工湿地的水力负荷率、氮磷去除效果和有机污染物的降解有重要的影响。