摘要
天然橡胶原产于低纬度地区,是重要的工业原料和战略物资.我国采用精细化的种植管理措施,成功的在18-24°N之间的云南、海南、福建、广东和广西5个省份进行了橡胶树的种植.但经过多年种胶,胶园土壤的肥力明显下降,而大量施肥对提高土壤肥力及产量增长效果并不明显,其原因可能与微生物数量、活性以及群落结构有关.本文采集了我国主要橡胶种植区海南、广东和云南3个省份5个橡胶种植区共75个土壤样品,分析了土壤微生物生物量碳.我国主要橡胶种植区土壤微生物生物量碳的值介于24.2~869mg/kg之间.微生物生物量碳分为以下4个水平：〈100,100~350,350~600和〉600 mg/kg.我国主要橡胶产区微生物生物量碳质量分数集中在100~350mg/kg,样点数为34个,占总样点数的45.3%.海南省橡胶园土壤微生物生物量碳质量分数普遍偏低,广东省建设农场微生物生物量碳质量分数主要分布在350~600 mg/kg,属于中等水平.云南省东风农场微生物生物量碳主要分布在〉600mg/kg,属于较高水平.胶园土壤微生物生物量碳与土壤有机质、全氮以及速效钾质量分数呈显著相关.对我国主要橡胶种植区土壤微生物生物量碳状况进行研究分析,对于评价胶园土壤肥力状况及指导施肥有指导意义.
Natural rubber production is important for industry and national defense,is usually planted in tropical areas.By intensive plantation and management strategies,rubber is successfully planted in Yunnan,Hainan,Fujian,Guangdong and Guangxi provinces in the area between north latitude 18°and 24°.However,soil fertility decreased significantly after long-term plantation of rubber tree,and fertilization did not work in improving soil fertility and yields.Possible mechanisms may be related to microbial biomass,activities and community structures.In this paper,75 samples were collected in the rubber plantation in Hainan,Guangdong and Yunnan provinces,and soil microbial biomass carbon was investigated.We classified the microbial biomass carbon of the rubber plantation into four levels according to present data：less than 100mg/kg;between 100 and 350mg/kg;between 350 and 600mg/kg and more than 600mg/kg soil.The microbial biomass carbon in main rubber production areas concentrated in the low level,which including 35 samples.In Hainan province,the microbial biomass carbon is generally low.In Guangdong province,microbial biomass carbon content are mainly distributed in between350 and 600 mg/kg,which belong to medium level.In Yunnan province,microbial biomass carbon are mainly distributed in more than600mg/kg,which belong to a higher level.Microbial biomass carbon and soil organic matter,total nitrogen and available potassium content were significantly correlated.
出处
《西南大学学报（自然科学版）》
CAS
CSCD
北大核心
2016年第7期64-69,共6页
Journal of Southwest University(Natural Science Edition)
基金
国家现代农业产业技术体系建设专项资金项目(CARS-34)
关键词
土壤肥力
微生物生物量碳
橡胶园
soil fertility
microbial biomass carbon
rubber plantations
