摘要
通过中子水分仪测定棉田土壤含水量的标定研究 ,得到了土壤不同深度的三条标定直线 :0 -2 5cm土层标定直线的截距和斜率是 1 .81 (v% ) ,2 3 .4 1 (v% cnt std) ;3 0 -80cm土层标定直线的截距和斜率是 -2 .77(v% ) ,2 6.2 5 (v% cnt std) ;90 -1 1 0cm土层标定直线的截距和斜率是 -6.62 (v% ) ,2 8.60 (v% cnt std)。还阐明了在利用中子水分仪作灌溉计划时精确的田间标定直线的必要性。
From the calibration study of the determonation of cotton soil moisture with neutron probe,we get the slops and intercepts of three calibration equations, which are 23.41v%/cnt/std and 1.81v% of 0-25cm soil layer,26.25v%/cnt/std and -2.77v% of 30-80cm soil layer, and 28.60v%/cnt/std and -6.62v% of 90-110cm soil layer .This paper also proves that it is necessary to use precise field calibration equation for irrigation shedule with neutron probe.Also,we bring forward a way to select the calibration sites in this paper,that is,the Hierachical clustering method.
出处
《塔里木农垦大学学报》
2001年第3期1-5,48,共6页
Journal of Tarim University of Agricultural Reclamation
