皆伐炼山对华西雨屏区杉木人工林碳库的影响.doc

皆伐炼山对华西雨屏区杉木人工林碳库的影响 马松莉1，邹成坤2，兰立达3，李德文3 （1松潘县林业局 松潘 623300） （2旺苍县林业和园林局 旺苍 628200） （3四川省林业调查规划院 成都 610081） 摘 要：人工林生态系统的C储量是陆地生态系统碳库之一,皆伐炼山所造成的环境负效应值得深思。本文以华西雨屏区28年生杉木人工林为研究对象，旨在阐明皆伐和炼山对杉木人工林生态系统C库的影响。结果如下：（1）皆伐所造成的干材C转移量为85.9（(7.6）t/hm2、（2）炼山所造成的采伐剩余物、林下层植物和凋落物C量损失分别为8.8（(0.3）t/hm2、0.19（(0.02）t/hm2和2.80（(0.08）t/hm2、（3）炼山能显著降低0-60cm层的土壤有机碳含量，其C损失量为39.5（(1.0）t/hm2。炼山造成的采伐剩余物、林下层植物、凋落物和土壤有机质燃烧所释放CO2量为188.1 t/hm2。在全球气候变化情景下，人工林皆伐炼山所造成的环境负效应不容忽视。 关键词：碳库；采伐剩余物；炼山；杉木人工林；华西雨屏区 Effects of clear-cutting and slash burning on carbon stock of Chinese fir plantation in Rainy Area of Southwest China Ma Songli1, Zou Chengkun2, Lan Lida3 and Li Dewen3 （1 Song pan Forestry Administration Buera, Song pan 623300, China） (2 Wangchang Forestry and garden Administration Buera, Wangchang 628200, China) (3 Institute of Sichuan Forestry Inventory and Planning, Chengdu 610081, China) Abstract Carbon reserve of artificial forest ecosystem is one of the major carbon stocks of terrestrial ecological system. Negative environmental effects caused by clear-cutting and slash burning were regarded by scientist and public. In this paper, 28-years-old Chinese fir Plantation in rainy area of Southwest China was regarded as the research objective, the main aims was to clarify the effects of clear-cutting and slash burning on carbon stock of Chinese fir plantation. The results are as follows: (1) C transfer amount of wood caused by logging was 85.9 (7.6() t/hm2, (2) C loss of logging residues, understory and litter caused by slash burning were 8.8 (( 0.3) t/hm2, 0.19 (( 0.02) t/hm2 and 2.80 ( 0.08() t/hm2, respectively, (3) Slash burning can significantly decrease the content of soil organic carbon in 0-60cm layer, the C loss is 39.5 (( 1) t/hm2. The total release of CO2, caused by burning of the understory plants, litter and soil organic matter, is 188.1t/hm2. In the global climate change scenarios, negative environmental effects caused by clear-cutting and slash burning of plantation cannot be i