摘要
对地处澜沧江上游滇西北山区大理洱源炼铁乡的云南松林,旱冬瓜林,梨树果园,桉树林,桤木+圣诞树混交林5种主要林分类型林地土壤的氮含量与微生物学性质进行了研究。结果表明:不同林分类型林地土壤的含氮量与微生物学性质存在明显差异;林地土壤中的硝化细菌数量对其土壤氮含量的贡献大于氨化细菌的数量,但氨化作用对其土壤氮含量的贡献大于硝化作用的强弱;林地土壤氮含量的高低与其土壤的微生物学性质强弱一致,而受不同林分类型影响,两者间的关系是显著或极显著的,且相互影响相互联系。随林地土层的加深,其土壤微生物学性质、土壤氮含量均逐渐减少。5种林分类型林地土壤的微生物活性与土壤氮含量的排序为:旱冬瓜林>桤木+圣诞树混交林>梨树果园>桉树林>云南松林。
The nitrogen content and microbial characteristics of soil of 5 major stands in Eryuan county namely Pinus yunnanensis, Alnus nepalensis, pear, eucalyptus, Alnus nepalensis ＋ Acacia dealbata were studied. The results indicated that there were significant differences between nitrogen content and microbial characteristics of different stands, the number of nitrifying bacteria was bigger than that of ammonifying bacteria, and the contribution of nitrifying bacteria on the content of nitrogen was bigger than that of ammonifying bacteria. The content of nitrogen in soil was consistent with the activity of soil microorganisms, and was varied with the types of forests. The relationship between nitrogen content and soil microbial characteristics was significant or very significant. The activity of microorganisms in deeper soil layers was lower than that of upper soil layers, and the content of nitrogen also decrease as the depth of soil increase.
出处
《西部林业科学》
CAS
2008年第1期41-45,共5页
Journal of West China Forestry Science
基金
云南省自然科学基金(2001C0044M)资助的"滇西北洱源山区典型退化土壤生态恢复技术研究"项目
