洞庭湖南岸南县水稻田土壤肥力因子空间变异特征  

Spatial Variability of Soil Nutrients in Paddy Fields of Nanxian County in Dongting Lake South Bank

作　　者：肖淑媛 徐晓昂 陈宗顺 余明光[1] 涂赛军 冯晖[1] XIAO Shuyuan;CHEN Xiaoang;CHEN Zongshun;YU Mingguang;TU Saijun;FENG Hui(Yiyang Vocational and Technical College,Yiyang 413000;Nanxian County Department of Agricultural and Ru-ral Affairs,Yiyang 413200,China)

机构地区：[1]益阳职业技术学院,河南益阳413000 [2]南县农业农村局,河南益阳413200

出　　处：《东北农业科学》2021年第5期35-39,共5页Journal of Northeast Agricultural Sciences

基　　金：国家重点研发计划(2017YFD0301506)。

摘　　要：采用GIS技术和地统计相结合方法,研究位于洞庭湖南岸的益阳市南县水稻田土壤肥力因子空间变异性及其影响因素。结果表明:研究区水稻田土壤大部分为碱性。土壤有机质和有效氮含量大部分地区为极高,有效磷和速效钾含量大部分地区为低值。土壤有效氮含量大于198 mg/kg的高值区主要分布于南县中北部,土壤有机质含量≥34 g/kg的高值区主要分布在南县中部和南部。土壤pH>7.9的碱性水稻田主要分布在南县中部和西部。大部分水稻田土壤速效钾含量≤88 mg/kg,主要分布在南县西部和中南部。大部分水稻田土壤有效磷含量≤20 mg/kg,主要分布于南县东部和西部。影响南县水稻田土壤肥力因子的主要因素有地形、土种和土壤环境所存在的各种障碍因子。The spatial variability of soil available nutrients and its influencing factors in paddy fields in Nanxian County,Yiyang City were studied based on the GIS technology.The results showed that most of the rice fields in the study area were alkaline.The contents of organic matter and available nitrogen were extremely high in most areas,while the contents of available phosphorus and available potassium were low in most areas.The high values of soil available nitrogen content greater than 198 mg/kg were mainly distributed in the central and northern part of Nanxian County,and the high values of soil organic matter content over 34 g/kg were mainly distributed in the central and southern part of Nanxian County.Alkaline paddy fields with soil pH>7.9 are mainly distributed in the central and western parts of Nanxian County.The soil available potassium content in most paddy fields is less than 88 mg/kg,and is mainly distributed in the west and south central of Nanxian County.The soil available phosphorus content of most paddy fields is less than 20 mg/kg,and is mainly distributed in the eastern and western parts of Nanxian County.The main factors affecting soil fertility in Nanxian County paddy field were terrain,soil species and various obstacles in soil environment.

关 键 词：水稻田 土壤养分 空间变异性 

分 类 号：S158[农业科学—土壤学]