摘要
对自然条件下８种土壤类型、３９个取样地块的２５个土壤理化参数的取样误差进行了综合研究．结果表明，不同地块间，按累计取样误差大小排序为：池塘＞地块边缘＞自留地＞林地＞商品菜地＞旱地＞水田＞滩地．在所有地块测定项目中，取样误差最大的是Ｃｌ－，平均高达７０％以上，其次是土壤有效磷，除滩地外取样误差基本上都超过３０％；有效钾和全硫的取样误差也多在２０％以上；取样误差最小的理化参数与成土母质有关，其中包括各种重金属和全量Ｐ、Ｋ、Ｍｇ以及ｐＨ和砂粒等，除极个别外，误差都在１０％以下；２种粒度的土壤水分、碳酸钙、粉砂、粘粒、有机碳、全量Ｎ、Ｎａ、Ｃａ、Ｂ和Ａｓ等１１项理化参数的取样误差居中，误差变动于１０％～２０％之间．聚类分析可以将不同测定项目大致分为３类，客观反映了人类活动对土壤理化参数分布均匀性的影响．
A
comprehensive study on soil sampling error was conducted based on 39 sampling plots of 8
different land use types with 25 soil physical and chemical parameters. The accumulative
sampling error of different land use types was in order of pond sludge>plot margin>home
garden>wood land>commercial vegetable plot>upland field>paddy field>beach plot.Among all
test parameters, Cl - was of the biggest smpling error, with a mean error of more than 70%. The
next one was available P, with a sampling error over 30%. The sampling errors for available K
and total S were also above 20%. The parameters with the smallest sampling error were related
with soil parent materials, which included various heavy metal elements, total P, total K, total
Mg, pH and sand, and their sampling errors were less than 10%. There were 11 parameters with
10～20% of sampling errors, such as water content of two granule soils, CaCO 3, silt, clay,
organic C, total N, total Na, total Ca, total B, and total As. The test parameters could be
classified into 3 types by cluster analysis, which objectively reflected the impact of human's
activities on the distributtion consistency of soil physical and chemical characteristics.
出处
《应用生态学报》
CAS
CSCD
1999年第3期353-356,共4页
Chinese Journal of Applied Ecology
基金
欧共体国际合作研究资助项目
关键词
农业环境
土壤分析
取样误差
Agricultural environment, Soil analysis, Sampling error
