中龄和老龄杉木人工林凋落物量及养分归还  

Litter production and nutrient return in 2 plantations of young and old Cunninghamia lanceolata

作　　者：郑金兴[1] 熊德成[2,3] 黄锦学[2,3] 杨智杰[2,3] 陈光水[2,3] 

机构地区：[1]福建林业职业技术学院,福建南平353000 [2]湿润亚热带山地生态国家重点实验室培育基地,福建福州350007 [3]福建师范大学地理研究所,福建福州350007

出　　处：《福建林学院学报》2013年第1期18-24,共7页Journal of Fujian College of Forestry

基　　金：福建省自然科学基金资助项目(D0510018;2008J0124)

摘　　要：为揭示中龄和老龄杉木人工林在凋落物量及养分归还方面的差异,对福建省南平市王台镇溪后村安曹下16年生和88年生杉木人工林进行了2 a的研究。结果表明,16年生和88年生杉木人工林年均凋落物量分别2 879.2、3 070.3kg.hm-2,凋落物各组分中落叶和落枝所占比重较大,16年生杉木人工林在杉木部分凋落量大于88年生,其它组分凋落量均小于88年生。2个林分凋落物养分含量各组分大小顺序基本表现为:N>K>P,16年生和88年生杉木人工林N、P、K年归还量分别为27.693、1.160、3.703 kg.hm-2和33.280、1.907、6.369 kg.hm-2。16年生和88年生杉木人工林凋落物量分别在2007年2月、11月,2006年11月以及2007年5月表现出2个明显峰值,2个林分N、P、K归还量动态变化趋势大致与各自凋落物量变化规律一致。The primary purpose of this study was to determine litter production, seasonal dynamics and nutrient return in 2 forests of young （16 year-old） and old （88 year-old） plantation of Cunninghamia lanceolata located at Wangtai in Nanping, Fujian, during a period of 2006 - 2008. The results showed as follows： Mean annual total litterfall in 2 years of observations varied from 2 879.2 kg＇hm^-2 in the 16 year-old C./anceo/ata to 3 070.3 kg-hm-2 in the 88 year-old C./anceo/ata, The fraction of litterfall in 16 year-old C./anceo/ata was larger than that in 88 year-old C./anceo/ata, while the other components were opposite. The ranking of nutrient concentration in each fraction were all showed as N 〉 K 〉 P in the 2 plantations. Nutrient return of N, P, K content in the 2 plantations were 27. 693, 1. 160, 3. 703 kg. hm-2 and 33.280, 1. 907, 6.369 kg. hm-2 respectively. Litterfall of the two C. htnceo/ata plantations showed two-peak distribution pattern with two peaks in February （ or May） and November of each year, meanwhile the dynamics of N, P, K in nutriem return was consistent with litterfall.

关 键 词：杉木 凋落物 养分归还 林龄 

分 类 号：S718.5[农业科学—林学]