刘玉华,史纪安,韩清芳,贾志宽,任鸿远,吴新卫.中子仪测定苜蓿田土壤含水量的标定研究[J].干旱地区农业研究,2007,(2):115~119 |
中子仪测定苜蓿田土壤含水量的标定研究 |
Calibration study of the determination of alfalfa soil moisture with neutron probe |
|
DOI:10.7606/j.issn.1000-7601.2007.02.24 |
中文关键词: 中子仪 田间标定 土壤含水量 |
英文关键词:neutron probe field calibration soil moisture |
基金项目:农业部948项目(2001-372); 教育部重点项目(重点01167); 农业部农业结构调整重大技术研究专项(2002-09-02A); 陕西省科技厅攻关项目(2001K01-J12-04) |
|
摘要点击次数: 360 |
全文下载次数: 333 |
中文摘要: |
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。 |
英文摘要: |
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. |
查看全文 查看/发表评论 下载PDF阅读器 |
| | |