刘家峡水库柳树固岸林防护效应试验

在刘家峡水库涨落带滩地A,B不同立地条件的地块上,用J172柳,J369柳和青刚柳栽植的护岸林在水库蓄水期间被水完全淹没下仍能存活,其中青刚柳的生长表现最好,在A地的成活率和保存率分别达到97.30%和96.20%;青刚柳的树高、胸径和新稍长分别比J172柳平均提高12.98%,12.50%和10.28%。柳树根系及主干基部长出的大量不定根,可减缓水库水流对滩地土层的冲蚀,以青刚柳1 m×1.5m密度配置的防护效果最好,冲蚀量仅8.64 kg/m2,比对照减少74.38%。坡度小的涨落带滩地更有利于柳树的成活和生长。

Experiment on Bank Fixation and Shelter Effects of Willow in Liujiaxia Reservoir

Salix viminalis was the strongest among all strains of the S.Jiangsuensis planted in the plot A and B in the fluctuation zone of the Liujiaxia Reservoir.In plot A,survival rate and preservation rate were 97.30% and 96.20%,respectively.Compared to the S.Jiangsuensis '172',tree height,breast diameter and the new branch and tree top increased on average by 12.98%,12.50% and 10.28%,respectively.The underground root systems and the plenty of adventive roots growing on basis trucks can greatly reduce soil erosion by reservoir water.The 1 m×1.5 m allocation density of the Salix viminalis showed the best protection,and sediment yield was 8.64 kg/m²,which decreased 74.38% compared to CK.The fluctuation land with a small slope is suitable for survival and growth of willow.