摘要
间伐迫使林分环境改变，影响林分生长、生物量及碳储量，准确评估杉木人工林短期间伐后碳储量变化对碳汇林业的发展具有重要意义。在贵州榕江县开展了4种间伐处理{T00[未间伐（0．0％），1800株·hm-2]、T11[轻度（16．7％），1500株·hm-2]、T22[中度（33．3％），1200株·hm-2]和T33[强度（50．0％），900株。hm-2]对18年生杉木人工林碳储量及其组分分配影响的研究。结果表明：经间伐3a后杉木人工林乔木层碳储量随间伐强度增加而减小，T00、T11、T22和T33样地依次为194．32、174．39、153．74和125．12t．hm-2，T33、T22和T11较T00降低了35．61％、20．88％和10．25％，T33间伐强度显著低于对照T00；杉木林下植被层碳储量随着间伐强度的增加而显著增加，占生态系统总碳储量的0．24％～1．98％；对其凋落物层碳储量无显著差异：杉木林地土壤有机碳储量随着间伐强度的增大也是逐渐增大，且有机碳储量在不同间伐处理间差异显著，除对照与轻度不显著外。间伐第三年杉木人工林生态系统总碳储量与凋落物现存量、土壤层和林下植被层碳储量呈负相关关系，且与林下植被层碳储量呈显著负相关；短期间伐后杉木人工林生态系统碳储量随着间伐强度的增加而逐渐降低，T00、T11、T22和T33样地分别为294．16、282．65、279．24和273．31t．hm-2，T33与T00样地差异显著，表明间伐3a样地仍处于恢复期，杉木人工林短期间伐试验会降低生态系统总碳储量。
Thinning changed the forest environment, affected forest growth, biomass and carbon, accurate assessment of Cunninghamia lanceolata plantationcarbon changed after short-term thinning was of great significance to the development of forestry carbon sequestration. This study in Rongjiang county in Guizhou province has carried out four kinds of thinning processing {T00 [not thinning （0.0%）, 1800 strains, hm-2], Tn [mild （16.7%）, 1 500 strains, hm-2], T22, moderate （33.3%）, and 1200 strains, hm-2） and T33 [intensity （50.0%）, 900 strains, hm-2）} to 18 years in Cunninghamia lanceolata plantation research on the effects of distribution of carbon and its components. The results showed that three years after the thinning of Cunninghamia lanceolata plantation tree layer carbon decreases with the increase of thinning intensity, and T00, T11, T22 and T33 order sample area was194.32, 174.39,153.74 and125.12 t.hm-2, 33, T22 and T11 to T00 was reduced by 35.61%, 20.88% and 10.25%, 33 thinning intensity was significantly lower than control T00; Cunninghamia lanceolata undergrowth layer carbon increased with the increase of thinning intensity increased significantly, 0.24 - 1.98% of the total ecosystem carbon; there was no significant difference on the litter layer carbon; Cunninghamia lanceolata forest soil organic carbon also increased with the increase of thinning intensity, and significant difference between organic carbon in different thinning processing, except with T33 was not significant.The thinning of the third year in a Cunninghamia lanceolata plantation ecosystem total carbon reserves and litter layer and soil layer and undergrowth layer are negatively related with carbon, and carbon has significant negative correlation with undergrowth layer; Short-term after thinning of Cunninghamia lanceolata plantation ecosystem carbon increased with the increase of thinning intensity decreases gradually, and T00, T11,T22 and T33 samples were294.16, 282.65, 279.24, and 273.31t·hm-2, T33 and T00 sample to significant difference, suggested that the thinning three years sample area was still in the recovery period, Cunninghamialanceolata plantation short-term thinning experiment would reduce total carbon ecological system.
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2016年第8期66-71,共6页
Journal of Central South University of Forestry & Technology
基金
贵州省重大专项(黔科合重大专项字[2012]6011号)
贵州省林业重大专项(黔林科合[2010]重大03号
黔林科合[2011]重大0l号)
贵州省农业科技攻关(黔科合NY字[2012]3027号)
关键词
人工林
生态系统
碳储量
杉木
短期间伐
plantation
ecosystems
carbon deposits
Cunninghamia lanceolata
short-term thinning
