华东师范大学学报（自然科学版）Issue(5)：85-93,9.
崇明三岛土壤主要养分的时空变异特征
Spatio-temporal variation of main soil nutrients in three islands in Chongming
摘要
Abstract
According to the data of organic matter (OM), total nitrogen (TN), available phos-phrus (AP) and available potassium (AK) of topsoil samples (0～20 cm) collected from 135 sites in 2007, the spatial distribution characteristics of the main soil nutrients in three islands in Chongming,Chongming island, Changxing island and Hengsha island, were analyzed using the methods of geostatistics and overlay analysis in the software of ArcGIS 9. 1. The results showed that the areas with higher OM and TN were mainly distributed in Chengqiao town and Bao town, and the values of both indices declined gradually towards northwest and northeast. The distribution trends of AP and AK were basically complementary. When comparing the values of 1980 and 2007 in terms of all these indexes, OM and TN did not change significantly, whereas AP increased rapidly and AK decreased. The results further revealed the unbalance in soil fertilization.关键词
崇明/土壤养分/时空变异/GISKey words
Chongming/ soil nutrients/ spatio-temporal variation/ GIS分类
农业科技引用本文复制引用
宋云,李德志,周燕,李红,柯世朕,孙玉冰,王春叶,赵鲁青,李立科..崇明三岛土壤主要养分的时空变异特征[J].华东师范大学学报（自然科学版）,2009,(5):85-93,9.基金项目
上海市科委"登山行动计划"崇明生态建设重大项目(06DZ2303) （06DZ2303）
国家自然科学基金(30370245,30470288) （30370245,30470288）
上海市生态学重点学科项目 （）
华东师范大学211工程项目 （）
