不同管理方式橡胶林土壤有机碳动态及其与氮、磷关系  

Variations of Soil Organic Carbon in Rubber Plantations under Different Managements and Its Relationships with Nitrogen and Phosphorus

作　　者：陈永川[1] 杨春霞[1] 黎小清[1] 李春丽[1] 邓乐晔[1] 

机构地区：[1]云南省热带作物科学研究所,云南景洪666100

出　　处：《西南农业学报》2015年第4期1725-1730,共6页Southwest China Journal of Agricultural Sciences

基　　金：国家科技支撑计划项目(2011BAD30B01);云南省科技创新强省计划项目(2009AB001);云南省热带作物科技创新体系建设基金资助

摘　　要：对云南西双版纳割胶、未割胶条件下橡胶林土壤有机碳动态变化特征及其不同保护带种植方式（距瓣豆绿肥覆盖与野生杂草覆盖）的响应研究表明,不同管理方式下橡胶林土壤有机碳含量呈现明显的动态变化,种植距瓣豆绿肥覆盖与野生杂草生长覆盖的橡胶林土壤有机碳变化趋势一致。随时间变化橡胶林土壤有机碳含量呈现先升高、后下降的变化趋势,土壤有机碳含量具有表层（0~20 cm）〉中层（20~40 cm）和底层（40~60 cm）垂直差异。不同管理方式下橡胶林土壤有机碳含量表现为未割胶处理〉割胶处理,割胶条件下距瓣豆绿肥覆盖土壤〉野生杂草覆盖。橡胶林土壤有机碳与全氮具有相同的动态变化趋势,而与全磷动态变化趋势随时间而不同。橡胶林土壤有机碳/全氮、有机碳/全磷与酸性磷酸酶活性呈著正相关。表明割胶和植被覆盖对橡胶林土壤有机碳动态具有较大的影响;土壤有机碳影响胶园土壤氮、磷、酸性磷酸酶变化。A study was conducted on the dynamic variations of soil organic carbon（ SOC） in the rubber plantations under different managements（ rubber tapping and no rubber tapping） and in the protection areas of the rubber plantations,which covered with Centrosema pubescens Benth green manure or weeds in Xishuangbanna. The SOC in the rubber plantations had obvious dynamic variations under different managements,and the SOC had the same trends when covered with green manure or weeds. The SOC presented a decreasing trend after an initial rising with time,and had a vertical difference of decreasing with soil depth,i. e.,surface layer（ 0- 20 cm） 〉medium layer（ 20- 40 cm）and bottom layer（ 40- 60 cm）. SOC was higher under no rubber tapping than under rubber tapping and was higher in rubber plantation covered with Centrosema pubescens Benth green manure than covered with weeds under rubber tapping. SOC had the same variation trends with total nitrogen,but had different same variation trends with phosphorus in different times. SOC / total nitrogen and SOC / total phosphorus had significantly positive correlation with soil acid phosphatase activity in rubber plantation,which indicated rubber tapping and vegetation cover had great influence on soil organic carbon dynamics in rubber plantations,and SOC had impact on nitrogen,phosphorus and acid phosphatase activity in rubber plantation.

关 键 词：橡胶林 管理方式 土壤有机碳 动态特征 氮 磷 

分 类 号：S714[农业科学—林学]