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神农架巴山冷杉林凋落物量养分归还及分解特征(PDF/HTML)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2017年01期
Page:
194-198
Column:
研究简报
publishdate:
2017-01-31

Article Info:/Info

Title:
Characteristics of litter production dynamic and decomposition process of Abies fargesii forest in Shennongjia, Hubei Province
Article ID:
1000-2006(2017)01-0194-05
Author(s):
CUI Hongxia1 PAN Lei1 HUANG Zhilin2 ZENG Lixiong2 WANG Xiaorong1 PANG Hongdong1
1.Hubei Academy of Forestry, Wuhan 430075, China;
2.Institute of Forest Ecology, Environment and Protection, CAF, Beijing 100091, China
Keywords:
Abies fargesii forest litter production nutrient return litter decomposition Shennongjia
Classification number :
S718
DOI:
10.3969/j.issn.1000-2006.2017.01.030
Document Code:
A
Abstract:
【Objective】 In order to reveal functions of litter in nutrient cycling of forest ecosystem, the dynamics of litter production and components, nutrient return and characteristics of decomposition process were studied in this paper. 【Method】We choose the natural and plantation forest of Abies fargesii in Shennongjia,and arranged litter collection boxes and decomposition bags in the sample area, to compare the litter production and decomposition rate differences between the natural forest and plantations through one year of continuous observation.【Result】①The total litter production of natural forest and plantation were 6 217.44 kg/hm2 and 4 833.46 kg/hm2, respectively, which of the natural forest was 28.63% higher than that of the plantation. ②The main litter fractions were leaves which accounted for 55.24%(natural forest)and 54.76%(plantation)to total litters, then the twigs(22.18%, 19.66%), and the barks, fruits and others were less relatively(22.58%, 25.58%). ③The annual dynamics mode of litter production was double peak curve, and the peak occurred in October and next June, and the nadir occurred in next February. ④The annual nutrient returns of natural forest and plantation forest were 77.84 kg/hm2 and 54.47 kg/hm2 respectively, which of the natural forest was 42.91% higher than that of the plantation, and the order of macro-element return was N>K>Ca>P>Mg. ⑤The litters were decomposed more fast in the initial phase, as the litter weight loss rate of natural forest and plantation express 18.70% and 11.35%,respectively. The litter decomposition constants of natural forest and plantation forest were 0.303 and 0.241, the half declining were 1.70 and 2.57 years, and the total declining were 9.30 and 12.12 years. 【Conclusion】 The litter production of A. fargesii forest is abundant, the litter decomposition rate of it is slow, and the effect of litters on soil improvement in natural forest is better than that in the plantation forest.

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Last Update: 2017-01-30