Litter and Caloric Value of Casuarina equisetifolia Plantation in Coastal Sandy Area

采用定位研究的方法,在福建惠安赤湖防护林场定期收集木麻黄林分的凋落物,开展凋落物的归还量和热值的研究.结果表明,木麻黄林凋落物年归还量为14.17thm-2a-1,小枝占总归还量的72.19%,其他各组分占27.81%.凋落物灰分含量小枝4.39%~5.65%,枝条3.52%~5.65%,球果2.63%~4.23%;凋落物干重热值为小枝20.51~21.68kJ/g,枝条19.63~20.21kJ/g,球果18.27~20.63kJ/g;凋落物去灰分热值为小枝21.48~22.69kJ/g,枝条21.48~22.69kJ/g,球果18.91~21.49kJ/g.图1表8参26The litter of Casuarina equisitiforia plantation in Hui′an County, Fujian was regularly collected, and its return amount and caloric value were studied. Result showed that the return amount of litter was 14.17 t hm-2 a-1, with leaf accounting for 72.19% and the others for 27.81%. The litter ash contents of leaf, branch and cone ranged between 4.39%~5.65%, 3.52%~5.65% and 2.63%~4.23%, respectively. The litter gross caloric values of leaf, branch and cone were 20.51~21.68 kJ/g, 19.63~20.21 kJ/g and 18.27~20.63 kJ/g, and the ash free caloric values of them were 21.48~22.69 kJ/g, 21.48~22.69 kJ/g and 18.91~21.49 kJ/g, respectively. Fig 1, Tab 8, Ref 26国家"十一五"科技支撑计划“沿海防护林体系构建技术”项目;; 福建省森林培育与林产品加工利用重点实验室和国家林业局南方山地用材林培育重点实验室资助(2004BA516A13-15)~