狗尾草根系固土拉力的原位测定

In-Situ Measurement of Fixing Capability of Soil by Faber Bristlegrass Roots

应用锚杆拉力计和自行设计的剪切箱对狗尾草根系的固土能力在深度为10cm和20cm进行了原位测定,结果表明:在10cm深度,当施加的载荷增大到4.9kN时,狗尾草样方位移为53.3mm,而裸地样方承受的最大载荷为4.4kN,在此载荷下位移达到了55.0mm。在20cm深度,当施加的载荷增大到5.3kN时,狗尾草样方位移为53.7mm,而裸地样方承受的最大载荷为4.0kN。该测定方法可以在水土保持上作为评价不同作物(植物)固土能力的有效手段。

In this experiment, applying the anchor-shank tensiometer and Shearing box designed by oneself had been carried on In-situ measurement to test the fixing capability of the root system of bristlegrass in the soil depths of lOcm and 20cm. The results showed that in 10cm depth, when increasing 4.9kN in load exerted, the displacement of the Faber bristlegrass sampled soil square was 53.3mm, whereas the biggest loads of sampled soil square bore 4.4kN and the displacement reached 55.0mm under this loacL In 20cm depth, when increasing 5.3kN in load exerted, the displacement of Faber bristlegrass sampled soil square was 53.7mm, however the biggest loads of sampled soil square bore 4.0kN. The in-situ measurement would appraise different crops（plants） fixing capability of soil in water and soil conservation as an effective method.