摘要
中子仪测定土壤水分方法的核心内容是中子计数与土壤含水量的曲线标定,为了绘制精确的能够应用于不同土壤层次、土壤质地、土壤有机质含量和土壤剖面含水量变化等条件的标定曲线,通过对已取得的不同土壤条件下标定曲线文献的整理分析,从中子仪测水的工作原理出发,分析了影响中子仪测定土壤水分的主要因素,概括了测水所遇到的主要问题及其解决的方法,并对准确测定含水量层状变化土壤,提出标定曲线绘制的可行方法。根据中子计数值不仅与土壤容积含水量有关,而且还与水分和中子计数器的距离有关,提出了进一步准确标定曲线的研究方法。
The curves demarcation of neutron counting and the soil moisture content were central contents in determining soil moisture by neutron probe.In order to draw up the curve which could been applied in the different soil profile,soil texture,organic matter content and soil profile water content.Through packing up the literature about curves demarcation of neutron counting and the soil moisture content,the emphasis factors were analyzed from working principle of neutron probe.It was sum up that the problems were fell across in measuring soil water content.According to neutron counting value not only related with soil moisture content,moreover also related with distance of neutron probe and the position where moisture content was surveyed,the accurate demarcation water content methods were proposed during soil profile water content changing in layer.
出处
《中国农学通报》
CSCD
北大核心
2011年第18期7-11,共5页
Chinese Agricultural Science Bulletin
基金
中央级公益性科研院所基本科研业务费专项资金"中国农业科学院农业资源与农业区划研究所项目"(2010-5)
国家小麦产业体系"十二五"德州实验站项目
关键词
标定曲线
土壤水分
中子计数
原位测定
calibration curve
soil moisture
neutron counting
antetype determination
