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.
出处
《高原气象》
CSCD
北大核心
1992年第4期479-484,共6页
Plateau Meteorology
关键词
土壤
含水量
测量
Soil water content
Water content measurement
Space alteration of water content.
