松嫩典型黑土带土壤碳氮磷储量空间分布特征  

Spatial Distribution Characteristics of Soil Carbon,Nitrogen and Phosphorus Reserves in Songnen Typical Black Soil Belt

作　　者：宋春威 杜会石[1] SONG Chun-wei;DU Hui-shi(College of Tourism and Geography Science,Jilin Normal University,Siping 136000,China)

机构地区：[1]吉林师范大学旅游与地理科学学院,四平136000

出　　处：《科学技术与工程》2024年第10期4028-4038,共11页Science Technology and Engineering

基　　金：吉林省自然科学基金(20210101398JC)。

摘　　要：松嫩典型黑土带分布着高有机质和高肥力的黑土资源,长期超负荷耕作致使土壤有机质含量大幅下降,故开展土壤营养元素储量研究对黑土资源保护和国家粮食安全具有重要意义。以松嫩典型黑土带为研究区,基于野外土壤样本实测数据1057件,利用地统计分析等方法,对0~20 cm耕层内土壤全碳(total corban,TC)、全氮(total nitrogen,TN)和全磷(total phosphorus,TP)空间分布特征及影响因素进行研究。结果表明:松嫩典型黑土带土壤TC、TN、TP储量均高于全国水平,含量分别达19.25、1.88、1.28 g/kg;TC、TN、TP高密度热值区和高聚集区主要分布在松嫩典型黑土带北部,TC、TN、TP自北向南呈现降低趋势;C∶N、C∶P和N∶P在该区北部空间聚集性较高;土壤粉粒含量在30%以上,TC、TN和TP含量较高,分别介于6.86~74.74 g/kg、0.94~5.93 g/kg、0.66~3.76 g/kg;TC、TN和TP储量受土壤pH、年均温度、年均降水量和地形等因素影响较大。研究为黑土资源保护和农业可持续发展提供科学依据。The Songnen typical black soil belt is distributed with black soil resources with high organic matter and high fertility.Long-term overloaded farming has led to a significant reduction in soil organic matter content.Therefore,it is of great significance to study the reserve of soil nutrient elements for the protection of black soil resources and national food security.The Songnen typical black soil belt was took as the research area,based on 1057 field soil sample measured data,using geostatistical analysis and other methods,the spatial distribution characteristics and influencing factors of TC(total carbon),TN(total nitrogen)and TP(total phosphorus)soil in the 0~20 cm tillage layer were studied.The results show these as follows.The contents of soil TC,TN and TP in the Songnen typical black soil belt were 19.25,1.88 and 1.28 g/kg,respectively,which were higher than the national level.The high-density calorific value area and high aggregation areas of soil TC,TN and TP are mainly distributed in the northern part of the Songnen typical black soil belt,and TC,TN and TP showed a trend from north to south decrease.The spatial aggregation of C∶N,C∶P and N∶P is higher in the northern part of this region.The soil silt content was more than 30%,and the contents of TC,TN and TP were high,ranging from 6.86 to 74.74 g/kg,0.94 to 5.93 g/kg and 0.66 to 3.76 g/kg,respectively.The content of soil TC,TN and TP are greatly affected by soil pH,average annual temperature,average annual precipitation and topography and other factors.The research results can provide a scientific basis for the protection of black soil resources and sustainable agricultural development.

关 键 词：土壤全碳 土壤全氮 土壤全磷 空间分异 松嫩典型黑土带 

分 类 号：S153[农业科学—土壤学]