摘要
运用分段标定及分层标定的方法,并结合点聚图筛选及容积含水量的三点平滑处理,线性标定及非线性标定相结合,在流动沙丘上进行了中子水分仪的田间标定研究。结果表明,多种方法结合进行标定大大提高了标定方程的精度,且降低了标定误差,相对误差降低到5.0%以下,结果令人满意;同时证实了中子水分仪在流动沙丘风沙土测定土壤水分的可行性及可靠性。
The field calibration of neutron probe in the soil of mobile sand dunes was researched by using the subsection and delaminating method together with dot clustering plot selecting and three - dots smoothing of volumetric moisture content, and by using linear and binomial models. The results showed that the calibration was satisfied, that is, the accuracy was greatly advanced and the error was reduced. It was proved that the neutron probe is a feasible and reliable way in measuring soil moisture of mobile sand dunes.
出处
《干旱地区农业研究》
CSCD
北大核心
2006年第4期72-75,共4页
Agricultural Research in the Arid Areas
基金
农业部"发展生态农业治理沙漠化土地技术研究与示范"(2003070405)项目
关键词
中子水分仪
田间标定
流动沙丘
土壤水分
neutron probe
field calibration
mobile sand dune
soil moisture
