摘要
本文就中子仪的计数误差、合理测量次数、探测半径、率定曲线等进行了探讨。探测半径约为 30 cm,当探测深度大于探测半径时 ,率定方程为直线 ,探测深度小于探测半径时 。
This paper discusses the counting error, the reasonable gauging times, probing radius and regression equation in soil water monitoring with neutron probe. The results show: The probing radius is about 30 cm for Model CNC503DR neutron probe meter. When the time of counting is 16 s, 32 s and 64 s, the reasonable gauging times are 3 times, 1 time and 1 time respectively. Regression equation is a linear as the depth is more than probing radius. The paper introduces the calculation approach to determining soil moisture in surface (<30 cm) and the formula of 10 cm surface.
出处
《干旱地区农业研究》
CSCD
北大核心
2000年第2期70-75,共6页
Agricultural Research in the Arid Areas
基金
中国科学院院长特别支持"棉花"项目和"西部之光"项目
