不同林龄木麻黄人工林细根养分现存量动态  

Dynamics of standing crop of nutrient and energy for fine roots of Casuarina equisetifolia plantations

作　　者：吴锡麟[1] 叶功富[2] 张立华[3] 

机构地区：[1]闽江学院地理科学系,福建福州350108 [2]福建省林业科学研究院,福建福州350012 [3]中国科学院烟台海岸带研究所,山东烟台264003

出　　处：《福建林学院学报》2011年第2期97-101,共5页Journal of Fujian College of Forestry

基　　金：国家"十一五"科技支撑计划资助项目(2009BADB2B0302);国家林业局南方山地用材林培育重点实验室资助项目

摘　　要：对福建省惠安县赤湖林场不同林龄木麻黄人工林细根养分现存量的季节动态进行了系统研究。结果表明,各林龄木麻黄人工林活细根中的养分现存量高于相应林龄的死细根,受环境条件和木麻黄生长特性的影响,各养分现存量一般在1、7和11月较高;随着林龄的增大,活细根中的养分现存量先升高,达到一定阶段后开始下降,N、P、K和C在30林龄林分中最高,而Ca和Mg则在18林龄中最高,死细根中的养分现存量随林龄的增大始终呈升高的趋势;因此,养分的吸收随着季节和林分林龄的变化而发生相应的变化。Seasonal dynamics of standing crop of nutrient for fine roots of Casuarina equisetifolia plantations of different ages was studied at Chihu forestry center of Hui′an County,Fujian Province.The results showed as follows： The standing crop of nutrients was higher in living fine roots than in dead fine roots for different aged C.equisetifolia plantations.The higher standing crop of nutrients in January,July and November than in other months responded to environmental conditions and the growth status of roots.The standing crop of nutrient increased and then decreased with forest ages.For living fine roots,standing crop of N,P,K and C reached the highest in 30-year-old plantation,while Ca and Mg in 18-year-old plantation.However,the standing crop of nutrients in dead fine roots increased gradually from 6 to 42-year-old plantations.So season and forest age would be responsible for the nutrient uptake.

关 键 词：木麻黄 细根 养分 季节动态 

分 类 号：S718.5[农业科学—林学] S792.93