香根草在水库及采石场边坡的水土保持效应研究

通过试验,测试了香根草在深圳市宝安区水库边坡和废弃采石场边坡的水土保持效应,并与未种植的裸地进行对照．结果表明,香根草种植后,第1年水土保持效果十分明显,土壤流失量分别减少了72．05％和68．09％;第2年水土保持能力基本趋于稳定,土壤流失量分别减少了90．45％和90．6％,据此认为香根草在边坡治理中有明显的水土保持效应,在深圳市有广阔的应用前景．

Effects for water and soil conservation of Veliveria zizanioides on the slopes of reservoir and stone pit

Based on a field test in the Bao'an District of Shenzhen city, the effects for water and soil conservation of Veliveria zizanioides ,a perennial herb in the family Gramineae,on the slopes of reservoir and stone pit were determined and analysed,compared with bare land without any plantation as control. The results showed that the species produced obvious effects for water and soil conservation, in comparison with the control,it reduced the soil loss amount on the slopes of the reservoir and stone pit by 72.05 % and 68.9 % respectively in the first year. Furthermore in the second year, its water and soil conservation effects tended to be steady in general,and reduced the soil loss amount on two types of slopes by 90.45 % and 90.6 % respectively. This experiment indicate that the plants have sigrnificant effects for water and soil conservation on slope control and protection