田块尺度下的苏北滩涂新垦农田土壤盐分空间变异性分析  

Spatial Variability of Soil Salinity in Reclaimed Mudflat Farmland of North Jiangsu Province

作　　者：张建兵[1] 杨劲松[1,2] 姚荣江[1,2] 余世鹏[1,2] 李芙荣[1] 

机构地区：[1]中国科学院南京土壤研究所/土壤与农业可持续发展国家重点实验室,南京210008 [2]中国科学院南京分院东台滩涂研究院,江苏东台224200

出　　处：《灌溉排水学报》2013年第1期39-42,共4页Journal of Irrigation and Drainage

基　　金：公益性行业(农业)科研专项经费项目(200903001);国家自然科学基金项目(41101199;41171181);江苏省自然科学基金项目(BK2009337;BK2011423;BK2011425;BK2011883)

摘　　要：为了消减盐碱障碍和提升地力,研究了苏北典型滩涂新垦农田土壤盐分的空间变异性。结果表明,农田土壤盐分东低西高,整体上属轻度盐渍化(含盐量1.27～1.98g/kg),但存在着盐斑(含盐量大于2g/kg)。表层及次表层土壤含盐量空间自相关程度强烈,其结构方差比分别为88.88%、80.75%;而其余土层含盐量间自相关程度为中等。垂直方向上,土壤盐分主要集中在犁底层(20～40cm)。The spatial variability of saline-alkaline was studied to reduce soil salt content and inprove land fertility in the reclaimed mudflat farmland. The results showed that field was mild salinization with some por- phyritic severe salinization in the southwest. The spatial heterogeneity degrees of 0~20 crn and 20~40 cm in soil depth were strong dependent with the structural variation ratio [C/（C＋Co）] of 88.88%, 80.75% respec- tively however, only moderate degree of spatial heterogeneity was found in the other three soil layers. The top of soil salt content appeared in the 20~40 cm soil layer, which was the plow pan of the study field.

关 键 词：田块尺度 滩涂新垦农田 电导率 空间变异 苏北 

分 类 号：S156.4[农业科学—土壤学]