内蒙古林业科技
內矇古林業科技
내몽고임업과기
INNER MONGOLIA FORESTRY SCIENCE AND TECHNOLOGY
2012年
3期
8-12
,共5页
希吉勒%赵萌莉%王静%何晓蕾%额尔敦花
希吉勒%趙萌莉%王靜%何曉蕾%額爾敦花
희길륵%조맹리%왕정%하효뢰%액이돈화
植被群落%根系生物量%根系固碳量%土壤碳储量
植被群落%根繫生物量%根繫固碳量%土壤碳儲量
식피군락%근계생물량%근계고탄량%토양탄저량
vegetation community%root biomass%carbon sequestration in root system%soil carbon storage
在陈巴尔虎旗具有代表性的草原类型,选择自由放牧和围封样地,采用壕沟法进行野外取样,研究放牧和围封下的根系以及土壤的碳密度及碳贮量。结果表明：围封后羊草草原和草甸草原地下碳储量增加,差异显著;针茅草原地下碳储量增加,差异不显著。其中围封草甸草原根系固碳量和土壤碳储量最大,分别为79.74 g/m2和21 150.49 g/m2;其次为围封羊草草原,分别为53.12 g/m2和14 643.65 g/m2;针茅草原最小,分别为47.90 g/m2和11 273.52 g/m2。与放牧样地地下碳储量相比分别增长了35.89%、50.17%、3.74%。虽然根系固碳量只占土壤碳储量的极少部分,但根系通过改良土壤结构,对增强碳源汇集和贮存、积累碳素具有重要的影响。自由放牧样地的根系碳密度和土壤碳之间没有显著相关性（R=-0.61）。围封样地根系生物量也随土壤深度增加呈递减趋势,但根系碳密度和土壤碳储量显著相关（R=0.98）。根系生物量、根系固碳量、土壤碳储量均随土壤深度增加呈递减趋势。
在陳巴爾虎旂具有代錶性的草原類型,選擇自由放牧和圍封樣地,採用壕溝法進行野外取樣,研究放牧和圍封下的根繫以及土壤的碳密度及碳貯量。結果錶明：圍封後羊草草原和草甸草原地下碳儲量增加,差異顯著;針茅草原地下碳儲量增加,差異不顯著。其中圍封草甸草原根繫固碳量和土壤碳儲量最大,分彆為79.74 g/m2和21 150.49 g/m2;其次為圍封羊草草原,分彆為53.12 g/m2和14 643.65 g/m2;針茅草原最小,分彆為47.90 g/m2和11 273.52 g/m2。與放牧樣地地下碳儲量相比分彆增長瞭35.89%、50.17%、3.74%。雖然根繫固碳量隻佔土壤碳儲量的極少部分,但根繫通過改良土壤結構,對增彊碳源彙集和貯存、積纍碳素具有重要的影響。自由放牧樣地的根繫碳密度和土壤碳之間沒有顯著相關性（R=-0.61）。圍封樣地根繫生物量也隨土壤深度增加呈遞減趨勢,但根繫碳密度和土壤碳儲量顯著相關（R=0.98）。根繫生物量、根繫固碳量、土壤碳儲量均隨土壤深度增加呈遞減趨勢。
재진파이호기구유대표성적초원류형,선택자유방목화위봉양지,채용호구법진행야외취양,연구방목화위봉하적근계이급토양적탄밀도급탄저량。결과표명：위봉후양초초원화초전초원지하탄저량증가,차이현저;침모초원지하탄저량증가,차이불현저。기중위봉초전초원근계고탄량화토양탄저량최대,분별위79.74 g/m2화21 150.49 g/m2;기차위위봉양초초원,분별위53.12 g/m2화14 643.65 g/m2;침모초원최소,분별위47.90 g/m2화11 273.52 g/m2。여방목양지지하탄저량상비분별증장료35.89%、50.17%、3.74%。수연근계고탄량지점토양탄저량적겁소부분,단근계통과개량토양결구,대증강탄원회집화저존、적루탄소구유중요적영향。자유방목양지적근계탄밀도화토양탄지간몰유현저상관성（R=-0.61）。위봉양지근계생물량야수토양심도증가정체감추세,단근계탄밀도화토양탄저량현저상관（R=0.98）。근계생물량、근계고탄량、토양탄저량균수토양심도증가정체감추세。
In this experiment,free grazing plots and enclosure plots are selected on representative grassland in Chenbaerhu Banner.Samples have been taken by trench method.It aims at studying root system and carbon density and storage in soil under free grazing and enclosure condition.In condition of enclosure,underground carbon storage of Leymus chinensis steppe and meadow steppe was increased with significant difference.Underground carbon storage of Stipa capillata steppe increase without significant difference.The highest values of carbon sequestration in root system and carbon storage in soil are in enclosed meadow steppe with 79.74 g/m2 and 21 150.49 g/m2 respectively,and then the carbon sequestration in root system and carbon storage in soil are in enclosed Leymus chinensis steppe with 53.12 g/m2 and 14 643.65 g/m2 separately,and the ones in Stipa capillata steppe are the lowest with 47.90 g/m2 and 11273.52 g/m2 separately.Compared with the grazing plot,they have risen by 35.89%,50.17% and 3.74% respectively.Although carbon sequestration in root system only account for a slight part of carbon storage in soil,root system can play an important role on enhancing carbon source sequestration and storage as well as carbon accumulation through improving soil texture.There is no significant correlation between carbon sequestration in root system and soil carbon under free grazing(R=-0.61).The root biomass in enclosure is also declining with the increase of soil depth,but the correlation between carbon sequestration in root system and soil carbon is significant(R=0.98).The research indicates that the biomass of root system,carbon sequestration in root system and soil carbon storage decrease with the increase of soil depth.
