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Physical and chemical soil properties in debris-flow bottomland plots
Zhang, QY1,2; Li, FD3; Chang, CP4; Pan, HL1; Ou, GQ1
Author of SourceChen, CL ; Major, JJ
meeting4th International Conference on Debris-Flow Hazards Mitigation - Mechanics, Prediction and Assessment
Conference DateSEP 10-13, 2007
Conference PlaceChengdu
Publication PlaceROTTERDAM
Contribution Rank1
AbstractIn the Xiaojiang River Basin of Yunnan Province, conflicts between humans and land become more and more serious, and debris-flow bottomland is one of the main land resources under development. In order to study the effect of different land uses on physical soil properties and soil nutrients, Daqing Gully is an example study. Soil samples were taken at depths of 0-10 cm, 10-20 cm, 20-40 cm, 40-60 cm, and 60-80 cm from three representative land use patterns (crop bottomland, forest bottomland, and natural bottomland). Their physical properties and soil nutrients, including total nitrogen (TN), total phosphorus (TP), available nitrogen (AN), available phosphorus (AP), available potassium (AK), and soil organic matter (SOM) were analyzed. Results showed that development of bottomland promotes soil TP and AP accumulation, pH value changes from alkalescency to neutral and significant organic matter decreases due to cultivation. Furthermore, the contents of TN and AN in crop bottomland are lower than forest bottomland and natural bottomland due to the growth of crops in soil consuming more nutrients. At the same time, the distribution and formation of water-stable aggregates in debris-flow bottomland soils under different land use has been studied. Results show that the content of water-stable aggregates is highly correlated with the content of organic matter; moreover, organic matter cements the soil-aggregate structure. The increased decomposition and decreased input Of organic matter after reclamation to crop bottomland is responsible for decreases in both the water-stability of aggregates and in the amount of water-stable aggregates in debris-flow bottomland soil. The results also showed that the contents of TP, AP and AK in soil were positively correlated with soil-particle composition.
Keywordland use soil properties debris flow bottomland soil nutrient crop bottomland forest bottomland
Indexed ByEI ; CPCI
Accession numberAccession number:20085211816300
WOS IDWOS:000267333300071
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Document Type会议论文
Corresponding AuthorZhang, QY
Affiliation1.Institute of Mountain Hazards and Environment, Chinese Academy of Sciences & Ministry of Water Conservancy, Chengdu, China;
2.Chiba University, Chiba, Japan;
3.Graduate School of Science and Technology, Chiba University, Chiba, Japan;
4.College of Resource and Environment Science, Hebei Normal University, Shijiazhuang, China
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
Zhang, QY,Li, FD,Chang, CP,et al. Physical and chemical soil properties in debris-flow bottomland plots[C]//Chen, CL, Major, JJ. ROTTERDAM:MILLPRESS SCIENCE PUBLISHERS,2007:735-742.
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