摘要
以海南澄迈林场的4种降香黄檀混交模式为研究对象,即降香黄檀×檀香、降香黄檀×母生、降香黄檀×沉香和降香黄檀×奥氏黄檀,分析比较不同混交模式下的土壤物理、化学和生物学性质,并运用主成分分析法对其土壤肥力进行比较评价。结果表明:不同混交模式土壤的理化性质和生物学性质均体现出垂直分布规律;土壤含水量、容重、pH值、养分含量、微生物数量和酶活性在不同混交模式间以及同一模式的不同土层间均存在差异性;4种混交模式中,降香黄檀×檀香模式的含水量、有机质、碱解N、有效P含量、细菌数量均最多,pH值最高,容重最小。通过主成分分析法计算4种混交模式土壤肥力大小顺序为降香黄檀×檀香>降香黄檀×母生>降香黄檀×奥式黄檀>降香黄檀×沉香,综合可知,檀香是降香黄檀最适宜的造林树种,能有效提高土壤肥力。
Four mixed models on Dalbergia odorifera T.Chen × Santalum album, Dalbergia odorifera T.Chen ×Homalium hainanense, Dalbergia odorifera T.Chen × Aquilaria sinensis, and Dalbergia odorifera T.Chen ×Dalbergia oliveri in Chengmai forest farm, Hainan province were selected for the analysis and comparision of soil physical, chemical and microbial properties. Soil fertility of these mixed models was assessed by principal component analysis. The results showed that soil physical, chemical and biological properties in different mixed models reflected the vertical distribution law. Soil water contents, bulk densities, pH, nutrient contents, microorganism quantities and enzyme activities between different mixed models and different layers of the same model were different. Water content,bulk density, organic matter, available nitrogen contents, available phosphorus contents and bacterial quantities of Dalbergia odorifera T.Chen × Santalum album were the largest, in which their pH values were the highest, while their bulk densities were the least. By principal component analysis, the comprehensive assessment of soil fertility was in the sequence of Dalbergia odorifera T.Chen × Santalum album > Dalbergia odorifera T.Chen × Homalium hainanense > Dalbergia odorifera T.Chen × Dalbergia oliveri > Dalbergia odorifera T.Chen × Aquilaria sinensis.Above all, Santalum album was the optimum afforestation species of Dalbergia odorifera T.Chen, which could effectively improve the soil fertility.
出处
《土壤通报》
CAS
CSCD
北大核心
2014年第5期1130-1136,共7页
Chinese Journal of Soil Science
基金
国家林业公益性行业科研专项项目(201304402)资助
关键词
降香黄檀
混交林
土壤肥力
主成分分析
Dalbergia odorifera T.Chen.
Mixed forest
Soil fertility
Principal component analysis
