测定土壤田间持水量的环刀滴水法探讨  

Discussion on Determination of Soil Field Water-holding Capacity by Cutting-ring Water-dripping Method

作　　者：成兆金 徐淑米 李长军[3] CHENG Zhao-jin;XU Shu-mi;LI Chang-jun(Meteorological Bureau of Rizhao City in Shandong Province,Rizhao 276826,China;Meteorological Bureau of Huaiyuan County in Anhui Province,Huaiyuan 233040,China;Shandong Provincial Meteorological Information Centre,Jinan 250031,China)

机构地区：[1]山东省日照市气象局,山东日照276826 [2]安徽省怀远县气象局,安徽怀远233040 [3]山东省气象信息中心,山东济南250031

出　　处：《江西农业学报》2018年第10期50-54,共5页Acta Agriculturae Jiangxi

基　　金：山东省气象局业务行业专项"自动土壤水分观测站整改(2016)";山东省气象局气象科学技术研究项目(2013sdqx10)

摘　　要：针对常用的小区灌水法、环刀法(威尔科克斯法)等田间持水量测定方法的不足之处,对环刀法中土壤样本吸水与脱水等步骤进行了改进,提出了环刀滴水法,并将其与小区灌水法进行了对比。结果表明:环刀滴水法适用于壤土、沙壤土、粘土田间持水量的测定,其测量值一般比小区灌水法略高,测量结果更合理,而且其测定时间比小区灌水法大幅度缩短;而小区灌水法只适用于壤土、沙土田间持水量的测定。Aiming at the shortcomings of the plot irrigation method and the cutting-ring method （Wilcox method） frequentlyused for the determination of soil water-holding capacity, the author improved the procedures of water absorption and dehydrationof soil samples in the cutting-ring method, put forward the cutting-ring water-dripping method, and compared this new methodwith the plot irrigation method. The results showed that the cutting-ring water-dripping method was suitable for the determinationof field water-holding capacity of loam, sandy loam and clay, and its measured values were slightly higher than those of the plotirrigation method in general; the measuring results of this new method were more reasonable, and its measuring time was muchshorter than that of the plot irrigation method. While the plot irrigation method was only appropriate for the determination of fieldwater-holding capacity of loam and sandy loam.

关 键 词：田间持水量 测定方法 威尔科克斯法 土壤重量含水率 环刀滴水法 

分 类 号：S152.7[农业科学—土壤学]