IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Alternative TitleImpacts of the Typical Herbaceous Plant Roots on Soil Scour Resistance in the Reservoir Riparian Zone
徐文秀1,2; 鲍玉海1; 韦杰2,3; 杨玲1,4; 贺秀斌1; 李进林1,4
Source Publication水土保持学报
Contribution Rank1
Other AbstractTo investigate the impacts of typical herbaceous plants roots on soil resistance to runoff erosion in the reservoir riparian zone,simulation flume experiments of undisturbed-soil were carried out to study the soil erosion resistance of 020cm soil layers of three grasslands(Cynodon dactylon,Hemarthria compressaand Xanthium sibiricum),and the bare land was taken as CK,and the root characteristics of different herbaceous plants and their effects on soil erosion resistance were also discussed.The results indicated that: (1)The roots of the three herbaceous plants mainly distributed in 010cm soil layer,root weight density, root length density,root surface area density and root volume density of H.compressa were significantly higher than those of C.dactylonand X.sibiricum (P<0.05).(2)With the prolonging of scouring time,the runoff sediment concentration of all soil samples decreased sharply at first and then gradually stabilized.The sediment concentration was higher and decreased rapidly within 0~3 min after discharge,decreased slowly within 3~6 min and stabilized within 6~10 min.Compared with the CK,the runoff sediment content could be effectively reduced in the different grasslands in the 10-minute scouring process.The runoff sediment concentration of 010cm soil layer followed the order of CK>C.dactylon>X.sibiricum>H.compressa, while that of 1020cm soil layer followed the order of CK>C.dactylon>H.compressa>X.sibiricum. (3)During the scouring process,the index of soil anti-scourability increased slowly at first and then increased rapidly,it was small and increased slowly within 0~3 min,gradually increased within 3~6 min and rapidly increased within 6~10 min.Compared with the CK,the root systems of different herbaceous plants could effectively increase the soil anti-scourindex,while there was a significantly difference between the three grasslands and the CK in 010cm soil layer.The index of soil anti-scourability of H.compressa grassland was the largest,which was 2.15 times of the CK,followed by X.sibiricum and C.dactylon grasslands,which were 1.60 times and 1.43 times of the CK,respectively.Furthermore,there also was a significantly difference in the index of soil anti-scourability between the grasslands and the CK in 1020cm soil layer besides the C.dactylon grassland.(4)The enhancement effects of herbaceous roots on soil anti-scourability mainly occurred in 010cm soil layer,and the enhancement effects of H.compressa roots on soil anti-scourability was the largest,followed by X.sibiricumand C.dactylon.The soil anti-scourability was closely related to root distribution and morphological indexes,especially root surface area density and root volume density of roots with diameter(D)≤1.5 mm.
Keyword抗冲性能 草本植物根系 抗冲指数 水库消落带
Indexed ByCSCD
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Cited Times:2[CSCD]   [CSCD Record]
Document Type期刊论文
Corresponding Author鲍玉海
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Corresponding Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
徐文秀,鲍玉海,韦杰,等. 水库消落带典型草本植物根系对土壤抗冲性能的影响[J]. 水土保持学报,2019,33(4):65-71+109.
APA 徐文秀,鲍玉海,韦杰,杨玲,贺秀斌,&李进林.(2019).水库消落带典型草本植物根系对土壤抗冲性能的影响.水土保持学报,33(4),65-71+109.
MLA 徐文秀,et al."水库消落带典型草本植物根系对土壤抗冲性能的影响".水土保持学报 33.4(2019):65-71+109.
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