河岸缓冲区对化肥的拦截作用

测定了4个河岸缓冲区立地类型(30°草坡、18°草坡、乔灌草植被带、灌草植被带)对研究区常用化肥尿素、硫酸钾、复合肥中NO2-、NO3-、NH4+、PO43-4种离子的拦截率。结果表明:18°草坡对不同化肥溶液中各离子的拦截作用均强于30°草坡;乔灌草搭配对各化肥溶液中NO3-、NO2-、PO43-、NH4+离子的拦截率在1,2,3m处均大于灌草搭配。建议河岸缓冲区设计时,结合其它实际条件,坡度设计越缓越能起到进化水质的作用;在河岸植被构建时,优先考虑乔灌草植被带搭配。

Riparian Buffer Zone on the Interception Effect of Fertilizer

In this paper, through the determination of the four site types of riparian buffer zones, 30 degrees, 18 degrees and grass slope, trees, shrubs, herbs vegetation belt, shrub-grass vegetation in the study area with common urea, potassium sulfate compound fertilizer, NO2-、NO3-、NH4 +、PO4 3four ion interception rate. The results showed that 18 degree grass slope on different fertilizer solutions of various ions in the interceptor role were strong in the 30 degreegrass slope; trees, shrubs, herbs match on the fertilizer solution NO2、NO3、NH4 + 、PO4 3ion interception rate in 1, 2, 3 m were greater than shrubs, herbs match, trees, shrubs, herbs match on 4 kinds ofion blocking effect was stronger in shrub and grass mix.Recommendations for riparian buffer design, in combination with other conditions, the slope design of slower and more can play a role in the evolution of water quality; riparian vegetation construction, give priority to with trees,shrubs,herbs vegetation zones.