当前位置: 首页 > 文章 > 中子仪测定苜蓿田土壤含水量的标定研究 干旱地区农业研究 2007,25 (2) 115-119
Position: Home > Articles > Calibration study of the determination of alfalfa soil moisture with neutron probe Agricultural Research in the Arid Areas 2007,25 (2) 115-119

中子仪测定苜蓿田土壤含水量的标定研究

作  者:
刘玉华;史纪安;韩清芳;贾志宽;任鸿远;吴新卫
单  位:
西北农林科技大学农学院
关键词:
中子仪;田间标定;土壤含水量
摘  要:
通过一次安装,免灌水,点聚图资料筛选和对容积含水率三点平滑的一套标定方法,应用中子仪对苜蓿田土壤含水量的标定进行了研究,得到了土壤不同深度的三条标定直线:20~60 cm土层标定直线为y=82.772x-3.007(R2=0.9353,R=0.9671);60~120 cm土层标定直线为y=77.822x+0.1032(R2=0.8283,R=0.9101);120~200 cm土层标定直线为y=83.327x-2.2304(R2=0.8871,R=0.9419)。中子仪法相对于土钻法所得含水量的平均相对误差为0.81%,说明所得标定方程精度较高,完全可以用中子仪法代替土钻法测定土壤含水量。
译  名:
Calibration study of the determination of alfalfa soil moisture with neutron probe
作  者:
LIU Yu-hua1,2,SHI Ji-an1,2,HAN Qing-fang1*,JIA Zhi-kuan1,REN Hong-yuan1,WU Xin-wei1(1.College of Agriculture,Northwestern A & F University,Yangling, Shaanxi 712100,China;2.College of Agriculture,He'nan University of Science and Technology,Luoyang,He'nan 471003,China)
关键词:
neutron probe;field calibration;soil moisture
摘  要:
From the calibration study of the determination of alfalfa soil moisture with neutron probe,we got three calibration equations,which were y=82.772x-3.007(R2=0.9353,R=0.9671) for 20~60 cm soil layer,y=77.822x+0.1032(R2=0.8283,R=0.9101) for 60~120 cm soil layer,and y=83.327x-2.2304(R2=0.8871,R=0.9419) for 120~200 cm soil layer.Average relative error of neutron probe method was 0.81% in comparison with oven drying method.This proved that it was feasible to determination soil moisture with neutron probe instead of oven drying method.

相似文章

计量
文章访问数: 8
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊