摘要
以西双版纳热带季节雨林与橡胶林的土壤机械组成、土壤有机质、全N、全P、全K为研究对象，对2种土壤在质地、结构与肥力上的差异进行了研究．结果表明；季节雨林与橡胶林的土壤在机械组成上差异较大，达1％的极显著水平；季节雨林砂粒含量较高，粉粒与粘粒含量相对较低，3个剖面0～100cm不同深度层次3种土壤颗粒所占比例平均为砂粒47．76％～57．43％，粉粒22．75％～23．69％，粘粒19．53％～29．50％，因此属于砂质粘壤土类型；相对于季节雨林，橡胶林砂粒含量较低，约占25．09％～31．88％，而粉粒、粘粒含量相对较高，其中粉粒约占33．33％～36．84％，粘粒约占31．29％～41．58％，因此属于粘壤土；2种土壤的有机质、全N、全P、全K与砂粒含量呈负相关，与粉粒、粘粒呈正相关，并且橡胶林土壤的有机质、全N、全P、全K含量明显要高于季节雨林，因此可以初步判定橡胶林的土壤肥力大于季节雨林．
The contents of organic matter, total N, total P and total K are usually different in different kinds of soils. This paper compares the mechanical composition and the organic contents in tropical seasonal rain forest soil with those in rubber forest soil. It aims at probing into the differences of texture, configuration and soil fertility between tropical seasonal rain forest and rubber forest. The comparison shows that the difference of mechanical composition is significant, reaching 1%. In the tropical seasonal rain forest soil, there is a big content of small gravels： the 0.02～2.00 meters fraction occupying 47.76%～57.43%, the 0. 002～0. 020 meter fraction 22. 75%～23. 69% and the 〈0. 002 meters [faction 19. 53%～29. 50%; so the soil of tropical seasonal rain forest belongs to gravel soil. In the rubber forest, however, the 0. 02～2. 00 meters fraction occupies 25. 09%～31.88%, the 0. 002～0. 020 meter fraction 33.33%～36. 84% and the 〈0. 002 meter fraction 31.29%～41.58% therefore, the soil of the rubber forest belongs to viscous soil. The contents of organic matter, total N, total P and total K in the two kinds of soils manifest a negative correlation with the 0. 02～2.00 meter fraction, yet showing a positive correlation with the 0. 002～0. 020 meter fraction and 〈0. 002 meter fraction. Furthermore, the organic contents of the rubber forest soil are higher than those of the tropical seasonal rain forest soil; so we can conclude that the soil fertility of rubber forest is bigger than that of tropical seasonal rain forest. This is why the rubber forest soil suits the quick growth of rubber trees for a good harvest.
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2007年第1期70-75,共6页
Journal of Central South University of Forestry & Technology
基金
中国生态系统研究网络课题(编号:1185010000)
关键词
森林生态
西双版纳
机械组成
有机质
热带季节雨林
橡胶林
土壤
forest ecology
Xishuangbanna
mechanical composition
organic matter
tropical seasonal rain forest
rubber forest
soil fertility
