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[1]YUE Xinjian,YE Gongfu,GAO Wei,et al.Characteristics of Litter Decomposition and Ecological Stoichiometry of Different Forests on Coastal Sandy Land in Fujian Province[J].Research of Soil and Water Conservation,2021,28(04):77-83.

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Characteristics of Litter Decomposition and Ecological Stoichiometry of Different Forests on Coastal Sandy Land in Fujian Province

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 28 Number of periods: 2021 04 Page number: 77-83 Column: Public date: 2021-08-10

Title:: Characteristics of Litter Decomposition and Ecological Stoichiometry of Different Forests on Coastal Sandy Land in Fujian Province

Author(s):: YUE Xinjian^1,2, YE Gongfu³, GAO Wei³, CHEN Zhiyong⁴, CHEN Mengyao¹, LI Die¹; (1.College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China; 2.Forest Inventory and Planning Institute of Fujian Province, Fuzhou 350003, China; 3.Fujian Academy of Forestry Science, Fuzhou 350012, China; 4.Changtai County Forestry Bureau, Zhangzhou, Fujian 363900, China)

Keywords:: coast protection forest; natural secondary forest; biometric characteristics; Chishan state forest farm of Dongshan County

CLC:: S718.5

DOI:: -

Abstract:: To explore the effect of difference and mechanism of different forests on coastal sandy soil, a decomposition experiment was carried out by using the litterbag method. Litter biomass and decomposition dynamics of five main forest types of shelterbelt on coastal sandy land of Fujian Province were studied. Initial characteristics, weight loss rate, CN ratio, CP ratio and NP ratio during decomposition were analyzed. The results show that litter biomass of different forests ranged from 10.08 t/(hm²·a)to 12.99 t/(hm²·a), and monthly dynamics showed slight difference. There were significant differences in the initial quality properties, such as TC, TN, CN ratio, CP ratio, CP ratio, cellulose and lignin contents. Weight loss rate during decomposition period conformed to Olson exponential attenuation model, and the estimated time of decomposition to 95% was 3.31 years for secondary forest, 4.92 years for Eucalyptus grandis×E. urophylla plantation, 5.38 years for Acacia crassicarpa plantation, 8.18 years for Casuarina equisetifolia plantation, and 13.80 years for Pinus elliottii plantation. Decomposition index(k)was positively correlated with the contents of TP and TN of litter, negatively correlated with TC, CN ratio and cellulose content, and also positively correlated with soil pH and AP. With the extension of decomposition time, CN ratio decreased exponentially, while CP ratio showed different tendency, NP ratios were relatively stable. The decomposition of litter was subject to the comprehensive influence of initial quality characteristics of litter, strong acidity of sandy soil, poor nutrition, high dryness, high wind speed and other factors, which could be adjusted by certain forest management, such as planting multiple tree species, fertilizing, as so as to regulate the decomposition rate of litter, improve the ability of self-fertilizing.

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Last Update: 2021-08-20