橡胶树与其他乡土树种混交对土壤微生物生物量碳的影响  

Effects of the Mixed Cultivation of Rubber Trees with Other Indigenous Tree Species on Soil Microbial Biomass Carbon of Rubber Plantations

作　　者：陈莉 兰国玉[1,3] 谭正洪 吴志祥 祁栋灵[1,3] 杨川 CHEN Li;LAN Guo-yu;TAN Zheng-hong;WU Zhi-xiang;QI Dong-ling;YANG Chuan(Rubber Research Institute,Chinese Academy of Tropical Agricultural Sciences,Danzhou,Hainan 571737,China;Institute of Tropical Agricultural and Forestry,Hainan University,Haikou,Hainan 570228,China;Danzhou Investigation ＆ Experiment Station of Tropical Crops,Ministry of Agriculture,Danzhou,Hainan 571737,China)

机构地区：[1]中国热带农业科学院橡胶研究所,海南儋州571737 [2]海南大学热带农林学院,海南海口570228 [3]农业部儋州热带作物科学观测实验站,海南儋州571737

出　　处：《西北林学院学报》2018年第6期26-30,共5页Journal of Northwest Forestry University

基　　金：国家自然科学基金(31770661);外交部澜沧江-湄公河国际合作项目(081720203994192003)

摘　　要：为了探讨橡胶树与其他乡土树种混交对橡胶林土壤微生物生物量碳(MBC)的影响,以橡胶纯种林、橡胶×火力楠(Michelia macclurei)混交林和橡胶×米老排(Mytilaria laosensis)混交林为研究对象,分析3种林地土壤表层(0～10cm、10～20cm、20～30cm)中的土壤微生物生物量碳的影响。结果表明,橡胶×火力楠混交林和橡胶×米老排混交林土壤微生物量碳分别下降了9.61%和9.87%,且分别在不同土层微生物量碳含量也减少了15.2%、8.78%、4.38%和11.95%、11.4%、5.97%;对混交林来说,微生物量碳受含水率、有机质、全氮、全磷和全钾影响不显著。纯种林土壤微生物熵分别比橡胶×火力楠混交林和橡胶×米老排混交林高了7.48%和3.79%。由于橡胶树与其他乡土树种混交,改变了土壤养分,而影响了土壤微生物量碳的含量。The purpose of this study was to understand the effects of the mixed cultivation of rubber trees with other indigenous tree species on soil microbial biomass carbon （MBC） in rubber plantations.Stands with different cultivation modes were used as research objectives,including planting pure rubber tree,mixed with Michelia macclurei ,as well as with Mytilaria laosensis .Contents of MBC in different layers （ 0- 10,10-20,20-30 cm） were measured.The effects of different cultivation modes on MBC were analyzed.The results showed that compared with pure rubber tree stand,the contents of MBC in mixed stands of M.macclurei and M.laosensis decreased by 9.61% and 9.87%,respectively.The MBC contents in three soil layers in two mixed stands mentioned above decreased by 7.55%,8.87%,12.29% and 4.02%, 11.4% ,13.74%,respectively.In the case of mixed stands,soil MBC was not significantly affected by water content,organic matter,total nitrogen,total phosphorus and total potassium.The ratios of soil C mic /C org of pure rubber stand were 7.48% and 3.79% higher than those mixed stands of M.macclurei and M.laosensis .It was concluded that soil MBC was affected by the changes of soil nutrients under mixed cultivation mode.

关 键 词：橡胶林 乡土树种 混交林 微生物量碳 

分 类 号：S718.521.3[农业科学—林学]