摘要
用中子仪对气候观测场与农田的土壤水分动态变化进行观测,对比发现两者存在明显差异;在河北霸州、黄骅和深州的三个气候观测场建立了IAG型中子仪的标定方程,通过与土钻法比较,30cm以下土层霸州站采用一个标定方程、黄骅站则采用两个标定方程效果较好,深州站的标定结果不理想;在中国气象局固城土壤水分试验小区建立了5 0 3DR型中子仪标定方程,通过与土钻法比较发现它适用于30cm以下土层。
In this paper, dynamic variations of soil moisture for climate observation field and cropland using neutron probes were compared. The results showed that the differences of both were obvious. The regression equations of neutron probes(IAG-Ⅱ)in three climate observation fields of Shenzhou, Huanghua and Bazhou of Hebei province were built. By comparison with the data measured using soil drill, for the soil below 30cm, one regression equation of neutron probe was adopted in Shenzhou and two regression equations in Huanghua. The regression equation of neutron probe (503DR) in examination plots of soil moisture in Gucheng was built. By comparison with the data measured using soil drill, the regression equation could be adopted for the soil below 30cm. For the soil between 0-30cm, measuring soil moisture using soil drill was proposed.
出处
《中国农业气象》
CSCD
2005年第2期77-80,共4页
Chinese Journal of Agrometeorology
基金
自然科学基金 (30 370 814 )
"十五"国家攻关项目"农业气象灾害预警技术研究"(2 0 0 1BA5 0 9B13)
