摘要
2016年1—11月,在福建省东山赤山国家森林公园内利用凋落物搜集器法对尾巨桉、厚荚相思、湿地松和木麻黄4种人工林凋落物的凋落物量及其动态变化、养分归还量及其动态变化进行研究。结果表明:南亚热带4种人工林的年凋落物量为7.3～10.1 t·hm^(-2),木麻黄的年凋落物量显著高于湿地松、尾巨桉和厚荚相思。4种林分年凋落物量的动态变化模式均为单峰型,峰值均出现在夏季,厚荚相思峰值出现在7月,其他3种林分均出现在9月,峰值月凋落物量占年凋落物量27.2%～38.3%。凋落物各组分中凋落叶所占比重最大(68. 3%～76. 0%),其次是枝(6. 3%～17. 8%)和其他组分(7. 0%～12.1%)。4种林分每年归还养分为3 932.6～4 900.3 kg·hm^(-2),凋落物各组分养分归还量从大到小顺序为叶>枝>其他组分>花果,各养分的归还量大小顺序为C>N>K>P。4种林分C、N、P、K动态变化模式均为单峰型,归还峰值也均出现在夏季,养分归还量动态变化与凋落物量动态变化趋势相同。
The seasonal dynamics of litter nutrient return of different plantations (including Eucalyptus grandis × E. urophylla , Acacia crassicarpa , Pinus elliottiii and Casuarina equisetifolia ) in a coastal sand dune of southern subtropical China was investigated using litterfall collectors from January to November 2016. The results showed that the annual litterfall of different forests ranged from 7.3 to 10.1 t · hm ^-2 . The annual litterfall of C.equisetifolia plantation was dramatically higher than that of other plantations. The dynamic change of four plantations was all unimodal curves and peaked in summer. The peak value of A.crassicarpa plantation appeared in July, and the other plantations all appeared in September, which accounted for 27.2% to 38.3% of the annual litterfall. In different components , the leaf litter occupied the largest proportions (68.3%~76.0%), followed by branches (6.3%~17.8%) and other components (7.0%~12.1%). The annual nutrient return ranged from 3 932.6 to 4 900.3 kg · hm ^-2 , which showed as leaves>branches>other components>fruits and each element appeared as C>N>K>P. The dynamic change modes of different elements all presented in unimodal curves, with the peak value appeared in summer, and the dynamic changes of nutrient return was as the same as the litterfall.
作者
林文泉
高伟
叶功富
黄石德
黄雍容
岳新建
LIN Wenquan;GAO Wei;YE Gongfu;HUANG Shide;HUANG Yongrong;YUE Xinjian(College of Forestry, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China;Fujian Academy of Forestry, Fuzhou, Fujian 350012, China)
出处
《森林与环境学报》
CSCD
北大核心
2019年第3期225-231,共7页
Journal of Forest and Environment
基金
福建省科技重大专项(2018NZ0001-1)
福建省自然科学基金项目(2016J01116)
福建省林业科学研究项目(闽林科[2016]3号)
福建省森林培育与林产品加工利用重点实验室
福建省木麻黄工程技术研究中心资助
关键词
凋落物
养分归还
南亚热带
人工林
litterfall
nutrient return
southern subtropical region
plantation
