滇中高原云南松人工林营养元素积累及其分配格局  

Nutrient Accumulation and Distribution Characteristics of Pinus yunnanensis Plantation in Central Yunnan Plateau

作　　者：佟志龙 贺莉莎 欧应花[1] 王跃兵 Tong Zhilong;He Lisha;Ou Yinghua;Wang Yuebing(Kunming Engineering & Research Institute of Nonferrous Metallurgy Co.,Ltd.,Kunming,Yunnan 650051,China;Yunnan Soil and Water Conservation Ecological Environmental Monitoring Terminal,Kunming 650106,China)

机构地区：[1]昆明有色冶金设计研究院股份公司,云南昆明650051 [2]云南省水土保持环境监测总站,昆明650106

出　　处：《广西林业科学》2019年第1期46-50,共5页Guangxi Forestry Science

基　　金：国家林业局林业公益性行业科研专项(201204101-10)

摘　　要：为了更好提供林地营养科学基础数据,对滇中高原20年生云南松(Pinus yunnanensis)人工林的营养元素含量、积累及其分配特征进行测定。结果表明:云南松人工林器官中营养元素含量由高到低的排序为:树叶、树枝、树根、树干,氮元素的含量最高,钾和钙次之,镁较低,磷最低。营养元素的积累量为376.38 kg/hm^2,其中乔木层营养元素积累量为284.05 kg/hm^2,占整个林分的75.47%,灌木层、草本层和凋落物层的营养元素积累量在整个林分的比例分别为4.21%、15.18%和5.14%。营养元素年净积累量为14.20 kg/hm^2,树叶、树枝、树干和树根的年净积累量分别占林分年净积累量的38.03%、28.99%、18.46%和14.69%。云南松人工林每生产1t干物质所需氮、磷、钾、钙和镁等5种元素的量为7.55 kg,表明云南松人工林对这5种营养元素的利用效率较高。In order to better provide basic bata for forestry nutrition science,the content,accumulation and its distribution pattern in 20-year-old Pinus yunnanensis plantation in central Yunnan plateau were studied.Results showed that the trend of the nutrient element contents in different organs from high to low was leaves,branches,roots,trunk. The content of N was the highest,followed by K or Ca. Mg was lower and P was the lowest. The total accumulation of nutrient elements was 376.38 kg/hm^2. The accumulation of nutrient elements in tree layer was 284.05 kg/hm^2 accounting for 75.47%,with 4.21% at shrub layer,15.18% at herb layer and 5.14% at standing litter layer. Annual net accumulation of nutrient elements was 14.20 kg/hm^2,with 38.03%in leaves,28.99% in branches,18.46% in trunk and 14.69% in roots. Accumulating per 1 t dry matter needed all five nutrient elements(N,P,K,Ca,Mg) 7.55 kg,which showed that the nutrient use efficiency of P. yunnanensis plantation was relatively high.

关 键 词：云南松人工林 营养元素 积累 分配 

分 类 号：S718.5[农业科学—林学]