土壤动物对川西高山/亚高山森林凋落物分解的贡献

应用生态学报

土壤动物对川西高山/亚高山森林凋落物分解的贡献

刘瑞龙¹,李维民²,杨万勤¹,谭波¹,王文君¹,徐振锋¹,吴福忠^1**

(¹四川农业大学生态林业研究所林业生态工程省级重点实验室, 成都 611130; ²四川省川西林业局, 四川理县 623102)

出版日期:2013-12-18 发布日期:2013-12-18

Contributions of soil fauna to litter decomposition in alpine/subalpine forests.

LIU Rui-long¹, LI Wei-min², YANG Wan-qin¹, TAN Bo¹, WANG Wen-jun¹, XU Zhen-feng¹, WU Fu-zhong^1

(¹Key Laboratory of Ecological Forestry Engineering, Institute of Ecology & Forestry, Sichuan Agricultural University, Chengdu 611130, China; ²Forestry Bureau of Western Sichuan, Lixian 623102, Sichuan, China)

Online:2013-12-18 Published:2013-12-18

摘要/Abstract

摘要： 采用凋落物分解袋法,研究了土壤动物对川西高山/亚高山森林代表性植物康定柳、方枝柏、红桦和岷江冷杉凋落物在分解第一年(2011年11月—2012年10月)不同关键时期质量损失的贡献.结果表明: 在凋落物第一年的分解过程中, 不同物种凋落物的分解速率大小依次为康定柳＞红桦＞岷江冷杉＞方枝柏,且均为生长季节大于冻融季节.土壤动物对凋落物分解的贡献率(P_fau)为方枝柏(26.7%)＞岷江冷杉(18.8%)＞红桦(15.7%)＞康定柳(13.2%),其中康定柳和方枝柏的P_fau在生长季节大于冻融季节,而红桦和岷江冷杉的P_fau为冻融季节大于生长季节.冻融季节土壤动物的作用与凋落物初始C、P和N/P显著相关,而生长季节则与N、C/N、木质素、木质素/纤维素显著相关.

Abstract: A field experiment was conducted using the litterbag method to quantify the contribution of soil fauna to litter mass loss of Salix paraplesia, Sabina saltuaria, Betula albosinensis and Abies faxoniana during different key periods of the decomposition process of the first year (from November 2011 to October 2012). The results showed that the mass loss rate showed S. paraplesia > B. albosinensis > A. faxoniana > S. saltuaria, and the rate in the growing season was greater than in the freezethaw season. The contribution rate of soil fauna to the mass decomposition displayed as S. saltuaria (26.7%)>A. faxoniana (18.8%) > B. albosinensis (15.7%) > S. paraplesia (13.2%), which was higher in the freezethaw season than in the growing season for litter of B. albosinensis and A. faxoniana while vice versa for litter of B. albosinensis and A. faxoniana. The contribution of soil fauna was mainly related to organic C, P and N/P in the freeze-thaw season, while N, C/N, lignin and lignin/cellulose in the growing season.

刘瑞龙1,李维民2,杨万勤1,谭波1,王文君1,徐振锋1,吴福忠1**. 土壤动物对川西高山/亚高山森林凋落物分解的贡献[J]. 应用生态学报.

LIU Rui-long1, LI Wei-min2, YANG Wan-qin1, TAN Bo1, WANG Wen-jun1, XU Zhen-feng1, WU Fu-zhong1. Contributions of soil fauna to litter decomposition in alpine/subalpine forests.[J]. Chinese Journal of Applied Ecology.