Study of Spatial-Temporal Variation Characteristics of Soil Physicochemical Properties Affected by the Irrigation with Reclaimed Water
Since the reclaimed water contains rich nutritive elements, such as nitrogen, phosphorus and kalium, etc., the rational application of which may enhance the soil fertility, reduce the fertilizer utilization and promote the plant growth. Simultaneously, it can alleviate water shortage. Along with the gradual urging water problem, that urban lawn and the human beings both are in great demand of water, the reclaimed water, as the substitution, has being widely used to water the lawn. The developing of the research, irrigating the lawn with reclaimed water, is helpful to broaden its utilized scale, and provide its application in lawn irrigation with basic theories and instructions. Through the site investigation in Beijing Teaching Botanical Garden, the research of lawn ecosystem irrigated with reclaimed water has been carried out, and the spatial-temporal variation of soil physicochemical properties due to the reclaimed water irrigation has been studied. The result indicated as following: temporally, theres no obvious variation of the content of organic matter and total nitrogen in every soil layer; in the 0–30cm soil layer, theres relatively small change in the content of soil available phosphorus, while that change is relatively big in 30–60cm soil layer; in 0–15cm soil layer, the change of total salt content is comparatively small and that change is relatively big in 15–60cm soil layer. Spatially, in each soil layer the content of organic matter, total nitrogen, total phosphorus, and total salt in the soil irrigated with reclaimed water are all higher than that in the soil irrigated with clear water. The irrigation with reclaimed water does have remarkable or extremely remarkable influences on the content of total phosphorus, rapid available phosphorus, rapid available potassium, total salt, K+ , Na+ , Ca2+ and Cl-. However, theres no remarkable influences on the bulk density, organic matter, total nitrogen, rapid available nitrogen, pH, Mg2+, NO3--N and NH4+ -N.
reclaimed water soil physicochemical properties spatial-temporal variation
YANG Zhuquan
Institute of Land Reclamation and Ecology Restoration, China University of Mining and Technology, Beijing 100083, China;College of Tourism, Guilin University of Technology, Guilin 541004, Guangxi, China
国际会议
2007环境科学与技术国际会议(The 2007 International Symposium on Environmental Science and Technology)
北京
英文
2007-11-13（万方平台首次上网日期，不代表论文的发表时间）