土壤含水量重复测定次数的实验研究  

THE EXPERIMENTAL STUDY OF THE REPEATED MEASURING NUMBER OF THE SOIL WATER CONTENT

作　　者：王尧奇[1] 吴敬之[1] 韦志刚[1] 刘巍[1] 高洪春[1] 邱传涛[1] 

机构地区：[1]中国科学院兰州高原大气物理研究所,甘肃省兰州市730000

出　　处：《高原气象》1992年第4期479-484,共6页Plateau Meteorology

摘　　要：本文根据土壤含水量空间变异性的程度,在测量精度为10％和置信概率为0.90的要求下,利用数理统计学方法确定了土壤含水量所需重复测定次数。张掖试验点80cm以上为5次,90和100cm各为8和10次。临泽试验点5,70,80cm分别需测定12,13和14次,其余各层小于7次。如测量精度为15％和置信概率为0.90,则所需测定次数,张掖不大于6次,临泽不大于8次。According to the space alteration level of the soil water content, using the mathematic statistics method the needful repeated measuring number of the soil water content has been decided under the accuracy of 10% and 0.90 degree of confidence.The needful repeated measuring number at Zhangye experimental site is 5 times above 80 cm; 8 times for 90 cm and 10 times for 100cm in soil and at Linze experimental site that is 12, 13, 14times for 5, 70 and 80 cm layers in soil, respectively. At the rest layers that is less than 7 times. If the accuracy is 15% and the degree of confidence is 0.90, the needful measuring number will be less than 6 times at Zhangye and less than 8 times at Linze.

关 键 词：土壤 含水量 测量 

分 类 号：S152.7[农业科学—土壤学]