福建林学院学报Issue(2)：120-125,6.
短枝木麻黄凋落小枝分解与单宁和养分含量的关系模型
Decomposition of Casuarina equisetifolia branchlets and relationship models with tanni nand nutrient concentrations
摘要
Abstract
The lost weight rates of litters and various substrate contents ( especially tannins ) of Casuarina equisetifolia were studied , fitted those utilizing mathematic models and got the optimum regression model for the first time .The relationship between tannins and nutrient concentration during decomposition was also analyzed .Decomposition studies using litter bags suggested that the time required for the loss of half of the initial dry weight (t50)in normal and decline forests were 0.78 and 0.71 a;and t 95were 3.36 and 3.05 a, respectively.The corrected models of exponential decay by Olson were used to imitate the time and retention rate of litters . In normal and decline forests R2 were 0.969 and 0.984, respectively, both were at significant levels , indicated the models could forecast the decomposition dynamic well .The lost weight rates of litters and various substrate contents of C.equisetifolia were discussed relatively to set up a mathematical model of the best regression equation (normal forest: y=-45.949 3-1.457 4x1 +0.194 0x3 +1.244 8x4 +0.660 9x5 , P<0.001;decline forest:y=15.144 1-1.555 1x 1-27.237 2x 2+0.185 8x 3+0.576 1x 5+0.516 9x 7, P<0 .001).Correlation analysis between tannins and nutrient contents during decomposing showed that there were significant correlations between P and total phenolic (TP) contents as well as N and protein-bound condensed tannins (PBCT) contents in normal forests , while in decline forests , C∶N ratio had a significant positive relationship with TP contents .关键词
短枝木麻黄/分解/单宁/养分/数学模型Key words
Casuarina equisetifolia/decomposition/tannin/nutrient/mathematical model分类
林学引用本文复制引用
张尚炬..短枝木麻黄凋落小枝分解与单宁和养分含量的关系模型[J].福建林学院学报,2014,(2):120-125,6.基金项目
国家自然科学基金项目（41201293）；国家“十一五”科技支撑计划项目（2009BADB2B0302）。 （）
