滨海盐碱地城市绿地土壤肥力的时空变化特征  

Characteristics of Temporal-Spatial Variability of Soil Fertility in City Greenbelt Soil of Coastal Saline Soil

作　　者：邹桂梅[1,2] 黄明勇[1] 苏德荣[2] 王振宇[1] 

机构地区：[1]天津泰达园林建设有限公司,天津300457 [2]北京林业大学省部共建"森林培育与保护"教育部重点实验室,北京100083

出　　处：《中国农学通报》2010年第5期110-115,共6页Chinese Agricultural Science Bulletin

基　　金：国家科技支撑计划(2007BAD67B03)

摘　　要：城市化不仅使土地及地域空间发生了变化,也使土壤肥力发生了根本性的变化。笔者运用模糊数学、主成分分析和层次分析方法,选取指标并计算了天津经济技术开发区土壤肥力各指标的隶属度、权重,并最终求得土壤肥力综合指数。对照分析了1998年和2008年秋季天津经济技术开发区城市绿地土壤盐分、pH值及养分的时空变化和土壤肥力综合指数变化。结果发现,10年来,研究区土壤盐分显著下降;碱解氮、速效磷和有机质有较大幅度的显著提高;土壤pH值略有下降,速效钾也略有增加;土壤肥力综合指数显著增加。分析了土壤肥力时间变化的主要原因可能是"浅密式"的暗管排盐工程和人为科学地施肥;土壤肥力空间变化的主要原因与开发区建区时客土的来源不同及填垫时间的不一致有关。Urbanization not only makes land and geographical space a change, but also soil fertility has been a fundamental change. We calculated the membership and weight by using the fuzzy math method, principal component analysis and AHP method. This author analyzed the temporal-spatial variability of soil total salt, pH, nutrient and the soil fertility index in the year of 1998 and 2008 in autumn in TEDA. We found that after 10 years of the soil survey in TEDA the soil total salt decreased markedly; soil available nitrogen, available phosphorus and organic matter increased remarkably; pH decreased slightly, available potassium rised slightly; the soil fertility complex index increased significantly. The main reason for time-varying of soil fertility may be ＂shallow dense＂ type of underground pipe salt drainage engineering and artificial fertilization of scientific manner; the main reason for spatial variation of soil fertility was related to different sources of new soil and filling the zone in different time when the zone was construction built.

关 键 词：城市绿地土壤 土壤肥力 时空变化 主成分分析 

分 类 号：S158[农业科学—土壤学]