川西山地人工柳杉-杉木混交林碳聚积效应研究

Carbon Storage Effects in Artificial Mixed Forest of Cryptomeria fortunei-Cunninghamia lanceolata in Montane Areas of Western Sichuan Province of China

本文以四川彭州为典型案例,采用材积源生物量法和土壤剖面分析方法,对栽植17年的人工柳杉纯林、杉木纯林以及柳杉-杉木混交林的碳聚积效应进行了比较研究。结果表明:柳杉-杉木混交林的生物量和林分碳贮量显著高于相对应的纯林,每公顷混交林的生物量为204 t,比柳杉纯林和杉木纯林增加16.0%和39.3%;每公顷混交林林分碳贮量为102 t,比柳杉纯林和杉木纯林增加16.1%和39.2%,碳聚积效应显著;柳杉-杉木混交林的土壤总孔隙度、毛管孔隙和非毛管孔隙均高于柳杉纯林和杉木纯林,这将有利于扩大土壤大水库,增加土壤保水抗旱的能力。

Carbon storage effects in 17- yr-old of Cryptomeria fortunei forest, Cunninghamia lanceolata forest and their mixed forest were compared in Pengzhou County, Sichuan, China, adopting volume-biomass method and soil profile investigation. The results showed that both biomass and forest carbon storage were significantly higher in mixed forest tban in the pore forests. The biomass was 204 t/hectare in the mixed forest, higher than that in tile pure forests of C.fortunei and C. lanceolata forests bv 16. 0% and 39.3%, respectively. Carbon storage was 102 t/hectare in the mixed forest, higher than that in pure forests of C.fortunei and C. lanceolata forest by 16. 1% and 39. 2% respectively. The soil total porosity, soil capillary, porosity and soil non-capillary porosity were higher in the mixed forest than that in the pure forests, which is favor of water conservation and drought-resistance of soil.