上游充通大警 Shanghai Jiao Tong University 崇明东滩北部农场区土地利用适应性评价 THE APPRAISAL OF APPLICABILITY FOR LAND UTILIZATION FROM THE NORTHERN FARM OF DONGTAN CHONGMING ABSTRACT Saline Soil is an important land resources,salinization of soil which affects agricultural production and gardens is the key factor.This study included a 33-point in those 10 plots in the northern part of the farm in Dongtan Chongming,Collecting a total of 89 soil samples,had the major physical and chemical properties of soil and salinization testing and statistical analysis.The results showed that:Soil pH was relatively high,alkaline soil accounted for 60.7%,strong alkaline soil 24.7%:Soil EC >0.7 mS-cm could be to 28.09%.some even as high as 3.885 mS.cm:Soil organic content was of 50.56%that was in 10 g-kg,>20 gkg of the soil only 1.12%;There was 33.33%of the soil lacking of phosphorus,only 12.12%of the soil was rich in available phosphorus;The soil was rich in potassium;Soil texture was light to heavy loam,39.4%of which was neutral loam soil the most suitable for plant growth;The soil ratio of normal salinity soil (<I gkg)was not high,only 13.48%,57.3%of the soil was light salinization soil,followed by 21.35%was neutral salinization soil.The absolute number of heavy salinization soil and saline soil was limited but some had been salt as high as 7.5~10.87 g-kg;From the integrated quality of the soil,class one and class two soil which were suitable for growing plants accounted for 6.06% and 75.76%,class three was for 9.09%,class four and five soil were for nearly 10%of all,because of the fine texture and rich potassium,they had strong availability and transformation,as the same time,as the high salinity and other restricted factors,they were undesirable soil types for plant growth.According to the results of soil quality analysis and evaluation,and for the development and use of saline soil as the starting point,the study raised the comprehensive measures for improving and using land resources. Key Words:Dongtan Chongming,Saline Soil,Soil Physical and Chemical Properties,Soil Improvement,Evaluation of Soil崇明东滩北部农场区土地利用适应性评价 B THE APPRAISAL OF APPLICABILITY FOR LAND UTILIZATION FROM THE NORTHERN FARM OF DONGTAN CHONGMING ABSTRACT Saline Soil is an important land resources, salinization of soil which affects agricultural production and gardens is the key factor. This study included a 33-point in those 10 plots in the northern part of the farm in Dongtan Chongming, Collecting a total of 89 soil samples, had the major physical and chemical properties of soil and salinization testing and statistical analysis. The results showed that: Soil pH was relatively high, alkaline soil accounted for 60.7%, strong alkaline soil 24.7%; Soil EC >0.7 mS·cm-1 could be to 28.09%, some even as high as 3.885 mS·cm-1 ; Soil organic content was of 50.56% that was in 10 g·kg -1 , >20 g·kg -1 of the soil only 1.12%; There was 33.33% of the soil lacking of phosphorus, only 12.12% of the soil was rich in available phosphorus; The soil was rich in potassium; Soil texture was light to heavy loam, 39.4% of which was neutral loam soil the most suitable for plant growth; The soil ratio of normal salinity soil (≤1 g·kg -1) was not high, only 13.48%, 57.3% of the soil was light salinization soil, followed by 21.35% was neutral salinization soil, The absolute number of heavy salinization soil and saline soil was limited but some had been salt as high as 7.5~10.87 g·kg -1 ; From the integrated quality of the soil, class one and class two soil which were suitable for growing plants accounted for 6.06% and 75.76%, class three was for 9.09%, class four and five soil were for nearly 10% of all, because of the fine texture and rich potassium, they had strong availability and transformation, as the same time, as the high salinity and other restricted factors, they were undesirable soil types for plant growth. According to the results of soil quality analysis and evaluation, and for the development and use of saline soil as the starting point, the study raised the comprehensive measures for improving and using land resources. Key Words: Dongtan Chongming, Saline Soil, Soil Physical and Chemical Properties, Soil Improvement, Evaluation of Soil