老龄杉木生物量及营养元素分布  

Biomass and Nutrient Elements Distribution under Aged Chinese fir Plantation

作　　者：刘芳[1] 涂传进[2] 吴良栋[2] 林同龙[1] 

机构地区：[1]福建省南平市林委 [2]福建省南平市延平区林委

出　　处：《中南林学院学报》2001年第3期41-45,共5页Journal of Central South Forestry University

摘　　要：为了探讨老龄杉木林生物量和营养元素分布特点 ,在福建省南平安曹下山洼和山坡老龄杉木林设立标准地 ,以平均木法调查乔木层生物量 ,以样方法调查林下植被及枯枝落叶层生物量 ,并分别测定营养元素含量 .结果表明 :山洼和山坡的老龄杉木林林分总生物量分别为 785 .72 2和 695 .95 4t·hm- 2 ,其中 ,乔木层生物量占林分总生物量的百分比分别为 98.72 %和 97.95 % ;山洼老龄杉木各器官营养元素含量分布为干 >枝 >皮 >叶 >根桩 >粗根 >中根 >细根 ,而山坡的为干 >皮 >枝 >根桩 >叶 >粗根 >中根>细根 ;山洼和山坡林型林分营养元素总量分别达 65 93.8999和 5 2 16.985 5 kg· hm- 2 ,山洼比山坡多 2 6.39% ;与林下植被层和凋落物层相比 ,乔木层的营养元素含量最高 ,山洼和山坡林型分别占 94.76%和 92 .16% ;在林分的各营养元素组成中 ,大量元素以 Ca O最多 ,微量元素以 Mn最多 .与该地 2 9年生第 1代杉木丰产林相比 ,老龄杉木的生物量及营养元素组成更有利于养分保持 。For the interest of biomass and nutrient elements distribution under aged Chinese fir plantation,plots were set up under this type of plantation located at valley and hillside in Ancaoxia,Nanping,Fujian Province.Stratum biomass was measured by the average tree method;biomass of undergrowth and litter layer was measured by the quadrat meathod;and samples of each organ were taken and determined for nutrition content.The results indicate that the stand gross biomass of aged Chinese fir plantation at valley and at hillside was up to 785.722 and 695.654 t·hm 2 ;the proportion of each stratum layer therein was 98.72 and 97.75%,respectively. The distribution of nutrient elements in each organ was in the sequence of trunk>branch>bark>leaf>rootstock>coarse root>middle root>rootlet for Chinese fir at valley,while trunk>bark>branch>rootstock>coarse root>middle root>rootlet for Chinese fir at hillside.The nutrition stock in Chinese fir plantation at valley(6 593.899 9 kg·hm 2 ) was 26.39% higher than that at hillside(5 216.985 5 kg·hm 2 ),and that in stratum was the highest and accounted for 94.76% at valley and 92.16% at hillside.Of stand nutrition stock.the amount of CaO was the most among macro elements and that of Mn was the most among microelements.With comparison to the first rotation stand of 29 year old high yield Chinese fir,the distribution of biomass and nutrition under aged Chinese fir was more advantageous to nutrition reservation.It is concluded that aged Chinese fir plays an important role in site fertility maintenance

关 键 词：杉木林 生物量 营养元素 分布 老龄树 

分 类 号：S791.27[农业科学—林木遗传育种] S718.554[农业科学—林学]