干旱地区农业研究
榦旱地區農業研究
간한지구농업연구
AGRICULTURAL RESEARCH IN THE ARID AREAS
2015年
2期
203-207,213
,共6页
活性有机碳%土壤碳库%复垦年限%弃耕地
活性有機碳%土壤碳庫%複墾年限%棄耕地
활성유궤탄%토양탄고%복은년한%기경지
labile organic carbon%soil carbon-pool%reclamation history%deserted salinized field
对干旱区盐渍化弃耕地不同恢复年限土壤有机碳及其碳库管理指数的变化进行分析，结果表明，弃耕地恢复初期土壤有机碳及活性有机碳（LOC）含量均低于弃耕地（CK），恢复3年（R3）、恢复5（R5）年和恢复10（R10）年的 LOC 都显著高于弃耕地，分别高出20．28％、16．00％和16．45％，土壤有机碳及活性有机碳含量均随着土层加深而降低，土壤碳库管理指数 CMI 在恢复初期低于 CK ，随着恢复年限的增加，R3，R5，R10土壤 CMI 显著高于CK 54．72％、19．79％和17．73％，R3、R5和 R10分别是 R1的3．20、2．48 和 2．43倍，表明干旱区盐渍化弃耕地经垦殖恢复后显著改善了土壤碳库质量，增加了土壤碳汇功能。相关分析表明，土壤 LOC 和 CMI 与土壤 Olsen－P 呈显著正相关关系，与 TOC 相比更能反映不同恢复年限土壤碳库的变化。
對榦旱區鹽漬化棄耕地不同恢複年限土壤有機碳及其碳庫管理指數的變化進行分析，結果錶明，棄耕地恢複初期土壤有機碳及活性有機碳（LOC）含量均低于棄耕地（CK），恢複3年（R3）、恢複5（R5）年和恢複10（R10）年的 LOC 都顯著高于棄耕地，分彆高齣20．28％、16．00％和16．45％，土壤有機碳及活性有機碳含量均隨著土層加深而降低，土壤碳庫管理指數 CMI 在恢複初期低于 CK ，隨著恢複年限的增加，R3，R5，R10土壤 CMI 顯著高于CK 54．72％、19．79％和17．73％，R3、R5和 R10分彆是 R1的3．20、2．48 和 2．43倍，錶明榦旱區鹽漬化棄耕地經墾殖恢複後顯著改善瞭土壤碳庫質量，增加瞭土壤碳彙功能。相關分析錶明，土壤 LOC 和 CMI 與土壤 Olsen－P 呈顯著正相關關繫，與 TOC 相比更能反映不同恢複年限土壤碳庫的變化。
대간한구염지화기경지불동회복년한토양유궤탄급기탄고관리지수적변화진행분석，결과표명，기경지회복초기토양유궤탄급활성유궤탄（LOC）함량균저우기경지（CK），회복3년（R3）、회복5（R5）년화회복10（R10）년적 LOC 도현저고우기경지，분별고출20．28％、16．00％화16．45％，토양유궤탄급활성유궤탄함량균수착토층가심이강저，토양탄고관리지수 CMI 재회복초기저우 CK ，수착회복년한적증가，R3，R5，R10토양 CMI 현저고우CK 54．72％、19．79％화17．73％，R3、R5화 R10분별시 R1적3．20、2．48 화 2．43배，표명간한구염지화기경지경은식회복후현저개선료토양탄고질량，증가료토양탄회공능。상관분석표명，토양 LOC 화 CMI 여토양 Olsen－P 정현저정상관관계，여 TOC 상비경능반영불동회복년한토양탄고적변화。
Soil organic carbon plays an important role in the soil ecosystems .This paper studied changes of soil or-ganic carbon and carbon-pool management index (CMI) deserted salinized fields with different reclamation history .Re-sults showed that soil organic carbon and active organic carbon were decreased with depth of soil layer .Soil organic car-bon was decreased in the first year after the reclamation ,the soil labile organic carbon (LOC) of R3 ,R5 and R10 was 20 .28% ,16 .00% and 16 .45% respectively higher than that in the control ,reaching significant levels .Soil carbon-pool management index (CMI) was lower than CK during early reclamation stage .With reclamation forwarding ,CMIs of R3 ,R5 and R10 were 54 .72% ,19 .79% and 17 .73% higher than CK ,respectively .R3 ,R5 ,and R10 were 3 .20 , 2 .48 ,and 2 .43 times as much as R1 .All above indicated that soil quality was improved to a certain degree after a long-term restoration of the salinized field ,and soil carbon sink was also enhanced .Correlation analysis showed that LOC and CMI were significant positive correlated to soil Olsen-P .LOC and CMI could reflect the changes of soil carbon pool in different years of reclamation ,better than TOC .
