文献类型：期刊文献

中文题名：马尾松人工林凋落物产量、养分含量及养分归还量特性

英文题名：STUDY ON LITTERFALL,NUTRIENT CONTENT AND NUTRIENT RETURN OF PINUS MASSONIANAPLANTATION

作者：葛晓改[1,2] 周本智[1] 肖文发[2]

第一作者：葛晓改

机构：[1]中国林业科学研究院亚热带林业研究所;[2]中国林业科学研究院森林生态环境与保护研究所

年份：2014

卷号：23

期号：7

起止页码：954-961

中文期刊名：长江流域资源与环境

外文期刊名：Resources and Environment in the Yangtze Basin

收录：CSTPCD;;国家哲学社会科学学术期刊数据库;Scopus;北大核心:【北大核心2011】；CSSCI:【CSSCI2014_2016】；CSCD:【CSCD2013_2014】；

基金：林业公益性行业科研专项(201104008);中国林科院亚热带林业研究所基本科研业务费(RISF6152)联合资助

语种：中文

中文关键词：马尾松人工林;凋落物产量;养分含量;养分归还量

外文关键词：Pinus massoniana plantation; litterfall; nutrient content ; nutrient return

分类号：S718.5

摘要：通过文献收集法对亚热带马尾松人工林主要分布区凋落物产量、养分含量和养分归还量进行分析,以研究我国马尾松林主要分布区凋落物养分动态和区域特征,以期在区域尺度上为马尾松林生产经营和生态管理提供更全面和更具普遍性的参考.结果表明：不同地区马尾松人工林凋落物产量差异显著,并随林分龄级而异,10～20、20～30 a龄级马尾松林凋落物产量差异较0～10、30～50 a龄级马尾松林凋落物大,产量最高地区的10～20、20～30龄级林分分别是产量最低地区同一龄级的2.93、2.74倍,30～50 a生林分产量最高地区仅是最低地区的1.37、1.63倍;凋落物不同养分含量差异显著,三峡库区N元素含量较高,福建三明P、Ca、Mg元素较高,K元素则是贵州龙里较高;广西武宣23 a生林分N归还量是8 a生N归还量的3.45倍,K归还量则是10.13倍.不同凋落物组织器官受环境影响的因素不同,不同林分对环境和立地因子的响应不同,因为气候对凋落物产量的影响具有滞后性,而在局部区域凋落物产量受环境因素影响较大;凋落物养分含量受林分土壤主要养分调节,凋落物养分归还量反映土壤养分的潜力,土壤养分通过马尾松的生长影响凋落物产量,说明马尾松林凋落物养分循环与土壤养分状况有很大关系,二者相辅相成、相互调节.
Litterfall, nutrient content and nutrient return in subtropical Pinus massoniana plantations were analyzed based on literature collection to quantify litter nutrient dynamics and regional characteristic of the major conifer species, which would help to provide more comprehensive and universal reference for production practice and ecological management at a regional scale for P.massoniana plantations. The results showed that. the difference of annual litterfall of P.massoniana plantations between different regions was significant and the litterfall was 3.31-- 11.43 t/hmz ~ a with an average of 5.3 t/hm2 ~ a. The litterfall difference was significant by stand age, the difference of litterfall between the class age within 10--20-year-old and 20--30-year-old was greater than in 0--10- year-old and 30--50-year-old, and the most litterfall with 10--20 and 20--30 class age were 2.93 times, 2.74 times as much as the least, respectively, while the most litterfall in 30--50 class age was only 1.37 times and 1.63 times, respectively. Litterfall in Wuxuan, Guangxi Province was increased first and then decreased with stand age, and 7-year-old stand was highest in Liuzhou, Guangxi Province and following decreased first and then increased with stand age, while in the Three Gorges Reservoir Area increased with increasing stand age. Litter monthly model was bimodal in Liuzhou, Guangxi province, the deciduous peak was in February and least in March, April, while the model of the total and leaf litterfall was similar and single peak mode in the Three Gorges Reservoir Area with the highest in November and the lowest in February. The litter model in Guanzhou was different per year, the first year peak in August, there was two peak periods in the second year with in July and October, the third year in June. The difference of the same organ with the same element in different regions was lager and the litter nutrient content difference with K, Ca and Mg was higher than the N and P content. Litter nutrient content with nitrogen element was highest in the Three Gorges Reservoir Area, while P, Ca, Mg elements were highest in Sanming, Fujian Province, and K element was the highest in Longli, Guizhou Province. Nitrogen return in 23- year-old stand was 3.45 times of that in 8-year-old stand, while potassium return in 23-year-old stand was 10. 13 times as much as in 8-year-old stand in Wuxuan, Guangxi province. Nitrogen return was 1.36 times more in 7 year old than in 31 year old stand, potassium return in that was 2.56 times in Liuzhou, Guangxi Province. Litter decomposition rate was not significant in short-term （one year） decomposition. Litter of different tissues and organs were affected by different environment factors and different stand with various site factors, which can be attributed to the time lagging effect and more responsive to local than to regional environment.