子午岭辽东栎群落碳储量研究

Carbon Density of Quercus liaotungensis Community in Ziwuling

通过对黄土高原子午岭辽东栎林群落的碳储量进行研究,目的是为黄土高原森林碳储量提供基础数据,并借助本次研究探究能较准确估算黄土高原碳储量的方法。土壤碳密度采用积分法和分层法2种估算方法,验证了积分法在估算土壤碳储量上的准确性和方便性。乔木层采用相对生长模型,以实测75株解析木生物量的值作为基础数据,建立辽东栎单株林木各组分生物量与树高、胸径的回归方程,推算出整个辽东栎林各器官的生物量,从而算出其碳储量。结果表明,土壤积分法能够较好的估测碳储量。土壤碳储量分别是109.794 9 t.hm-2(90 cm分层法)和111.938 t.hm-2(100 cm积分法);乔木层、林下灌木层、草本层、枯落物的碳储量分别是53.452 9、2.700 5、4.482 7、5.243 9 t.hm-2,得出空间分布序列均为土壤层>乔木层>枯落物层>草本层>灌木层。最后引出辽东栎能够与真菌形成菌根共生体,菌根在辽东栎林的固碳作用可能为碳研究开辟一条新途径。

Organic carbon storage（SOC） of Quercus liaotungensis in Ziwuling were studied to supply basic carbon storage data for the forests in Loess Plateau,and to explore an accuracy method to calculate carbon storage.Two estimate methods were used： integral arithmetic method and method that SOC content were given by layer.Integral arithmetic method verified the accuracy and convenience in estimating the soil storage of forest.By means of allometric scaling models,values of biomass of 75 analytic trees were used as basic data to establish the regression equations of biomass to tree height and diameter at height of breast,to estimate the biomass of each organ of Q.liaotungensis,and to calculate carbon storage.The integral arithmetic method could access the SOC perfectly.The SOC storage were 111.938 t·hm^-2 and 109.794 9 t·hm^-2 with two methods.Tree layer carbon,shrub layer,herbal layer,litter layer storage were 53.452 9 t·hm^-2,2.700 5 t·hm^-2,4.482 7 t·hm^-2,5.243 9 t·hm^-2 respectively.The order of special distribution was soil〉the tree layer〉the litter layer〉the herbal layerthe shrub layer.Fungi could form mycorrhizal association with Q.liaotungensis.The function of mycorrhiza in carbon fixation needs further to be studied.