新疆农业科学2017，Vol.54Issue(1)：165-170,6.DOI:10.6048/j.issn.1001-4330.2017.01.021
伊犁河谷草地土壤容重的变异性与测定标准化
Soil Bulk Density Variation of Grassland in Ili Valley and the Measurement Standardization
摘要
Abstract
[Objective] The purpose of this project is to study the variation of soil bulk density in the horizontal and vertical directions and the influence of the gravel content on the determination results of bulk density in the hope of promoting the standardization of soil analysis and soil resource management.[Method] Based on field soil survey,56 soil profiles were dug in grassland of the Ili Valley.Soils were sampled by using core method at uniformly set soil layers,and each layer was repeatedly sampled five times.Gravel content was measured in lab when it existed at a certain soil layer.The coefficient of variation (CV) was used to quantitatively express lateral variation of soil bulk density.[Result] The mean CV values of soil bulk densities measured from five samples for all soil layers were lower than 8％.Gravel could improve soil bulk density by about 16％.Soil bulk densities of varied soil layers at vertical direction were significantly different,and bulk density increased along with increasing soil depth.[Conclusion] Soil layer should be rationally classified when studying bulk density of soil profile in grassland.In view of the fact that highly stony soils existed in grassland of Xinjiang,we suggest that the relevant standard for measuring bulk density should be modified.关键词
砾石/垂直变异/变异系数/土壤质量标准化Key words
stone/vertical variation/coefficient of variation/soil quality standardization分类
农业科技引用本文复制引用
张文太,陈诗,刘耘华,盛建东,苏悦..伊犁河谷草地土壤容重的变异性与测定标准化[J].新疆农业科学,2017,54(1):165-170,6.基金项目
Special Fund for Strategic Pilot Technology of Chinese Academy of Sciences (XDA05050405),National Natural Science Foundation of China Youth Fund Project (41301231),and National Undergraduate Innovation and Entrepreneurship Training Programs (201410758014)中国科学院战略性先导科技专项(XDA05050405) （XDA05050405）
国家自然科学基金青年基金项目(41301231) （41301231）
国家大学生创新创业训练计划项目(201410758014) （201410758014）
