| 刘华.区域土壤质量特征的方差分析和系统聚类分析[J].广东农业科学,2014,41(7):62-66 |
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区域土壤质量特征的方差分析和系统聚类分析 |
| Variance analysis and hierarchical cluster analysis oncharacteristics of soil quality at regional scale |
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| DOI： |
| 中文关键词: 土壤质量 性状特征 方差分析 聚类分析 |
| 英文关键词: soil quality property characteristics variance analysis hierarchical cluster analysis |
| 基金项目:广东省科技计划项目（2009B030802049，2011B0
30800017）；湛江师范学；引进人才项目62 |
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| 中文摘要: |
| 对广东茂名小良水土保持试验站的天然混交林、阔叶林、松桉混交林、光板地和不同品种的纯桉林共9
块试验地的45 个观测点土壤的物理性状、化学性状、微生物性状和酶活性等32 个影响土壤质量的指标进行取土化
验测试、方差分析和系统聚类分析，结果表明；当姿=20 时，样地分为2 类；1、2 号样地为一类，其他样地为一类；当姿=
10 时，样地分为3 类；4 号样地为一类，1、2 号样地为一类，其他样地为一类；当姿=5.1 时，样地分为5 类；4 号样地为
一类，1、2 号样地各为一类，5、6、7 号样地为一类，3、8、9 号样地为一类。可见此种分类中各类土壤质量的特征非常
明显，地力好、差顺序与实际样地完全相符。方差分析发现；9 块样地之间的物理性状差异极显著，酶活性方面的差异
较显著，各项化学和微生物性状的差异远远小于物理的差异。通过分析可以看出，小良各样地的土壤性状相差不大，
相对均一，并且土壤质量各方面的性状特征都很差。可见，土壤生态修复是一个非常缓慢的过程，要迅速控制水土流
失，改善土壤质量，必须辅以人工措施，以加速生态修复的进程。 |
| 英文摘要: |
| This paper studied soil samples from the region of Xiaoliang water conservation station, in Maoming,
Guangdong, including naturally restored forest, broad leaf forest, eucalyptus pine mixed forest and bare land etc. 32 indices
based on the physical, chemical, microbiological and enzyme properties of the soil were studied, from 9 different vegetation
patterns at 45 observation points through soil tests, variance analysis and hierarchical cluster analysis. The results showed
that, when =20, there were two categories, sample field 1 and 2 classified as one category, and the others classified as
one; when =10, there are three categories, sample field 4 was one category, sample field 1 and 2 classify as the other
category, and all the others classified as the third category; when =5.1, there were five categories, sample field 4 was one
category, sample field 1 and 2 separately classifies as one each, sample field 5, 6 and 7 classified as one, and 3, 8 and 9
classified as one. It was seen that the classifications of sample soil quality were perfectly clear, and the results of sample
soil productivity were in good agreement with the real field situations. Through the variance analysis, it was shown that the
physical characteristics of the 9 sample fields had significant differences. The enzyme properties showed relatively
significant differences too; and the differences in chemical and microbiological characteristics are much less than those of
physical characteristics. Through the analysis, it was shown that the soil quality in each sample field showed relatively
uniform characteristics, which were quite poor. In conclusion, the ecological restoration of soil is a very slow process. In
order to control the water and soil erosion, improving the soil quality, manual actions must be carried on in the ecological
restoration process. |
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