不同土壤类型及测定距离下人工与自动站土壤湿度差异分析  

Variation Analysis Between Manual and Automatic Soil Moisture Observation Under Different Soil Types and Measure Distance

作　　者：马志红[1,2] 方文松[1,2] 刘学义 Ma Zhihong Fang Wensong Liu Xueyi(CMA · Henan Key Laboratory of Agrometeorological Support and Applied Technique,Zhengzhou 450003, China Henan Institute of Meteorological Sciences ,Zhengzhou 450003, China Fanqu farm Meteorological Station,Zhoukou 466200, China)

机构地区：[1]中国气象局.河南省农业气象保障与应用技术重点开放实验室,郑州450003 [2]河南省气象科学研究所,郑州450003 [3]泛区农场气象局,河南周口466200

出　　处：《气象与环境科学》2016年第4期43-48,共6页Meteorological and Environmental Sciences

基　　金：公益性行业(气象)科研专项(GYHY201306046)资助

摘　　要：为研究不同土壤类型、不同测定距离下人工及DZN2型自动站土壤湿度的差异,在河南省泛区、鹤壁、许昌三个试验点选择代表性较强的砂土、粘土和壤土三种土壤类型为研究对象,于2013年、2014年在冬小麦全生育期分别距离自动站探头140—150 cm、100—110 cm位置人工取土,进行土壤湿度差异分析。结果表明:在冬小麦生育期内,人工与自动站所测土壤湿度的差值粘土最小,壤土的次之,砂土的最大,粘土、壤土播种时差值最大,砂土中最大差值出现在抽穗前。差值随土壤深度的垂直变化,总体表现为砂土波动范围最大,壤土、粘土的相对较小。在10—30 mm降水后,三种土壤类型差值均有不同程度的增加,其中砂土中差值增加最大;降水量在30—50 mm后,粘土和壤土的差值较小,砂土的差值较大。三种土壤类型下,人工取土点距离自动站探头150 cm以内,总体差异不显著。In order to study the variation between soil moisture value achieved by manual measured and DNZ2 automatic soil moisture monitor under different soil types and observed distance,sandy loam,clay and loam these three kinds of soil were chose in Fanqu,Hebi and Xuchang stations of Henan province. And the observed distance by manual in 2013 and 2014 was 140—150 cm and 100—110 cm respectively by the center of the monitor during the whole growing season of winter wheat. The variation of soil moisture were analyzed. The results showed that during the growing season of winter wheat,the difference between manual and the monitor was smallest for clay,and the bigger for loam,and the biggest for that of sandy loam. The difference were biggest when sowing for clay and loam,while for sandy loam,the largest difference appeared before earing. Generally speaking,the vertical variation of the difference with soil depth showed that the fluctuation of sandy loam was much more obvious than loam and clay. If the precipitation was 10—30 mm,the difference between manual and the monitor after the rain increased in different degrees for three soil types,and increased most for sandy loam; if the precipitation was 30—50mm,the difference decreased for clay and loam,but continue to increase for sandy loam. For three soil types,within 150 cm in the center of the monitor,there was no significant difference for the distance of manual sampling.

关 键 词：土壤类型 重量含水率 自动土壤水分仪 测定距离 

分 类 号：S152.7[农业科学—土壤学]