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为了阐明择伐面积对群状择伐后所栽植幼树碳储量的影响及择伐与人工更新共同作用对华北落叶松低效林林下灌草、枯落物碳储量的影响,对0.02,0.03,0.05hm2孔隙内人工栽植的幼树,以及林下灌草和枯落物碳储量的变化规律进行研究。结果表明:对于生物量来讲,人工更新栽植的华北落叶松生物量随着择伐孔面积的增大而增加,人工更新栽植的白桦生物量在面积为0.03hm2时达最大值;同一树种不同择伐面积下,当择伐面积为0.03hm2时,灌木生物量达到最大;不同择伐面积下,栽植华北落叶松择伐孔内草本生物量均高于白桦;随着择伐孔面积的增大,枯落物的生物量逐渐减少,且白桦样地内的枯落物生物量较高。对于碳储量来讲,栽植同一树种的样地内,随着群状择伐孔径的增加,白桦样地碳储量呈递减趋势,而华北落叶松则为先增加后减少趋势。同一择伐面积下,栽植华北落叶松的样地总碳储量均较白桦高,且当择伐孔面积为0.03hm2时,栽植华北落叶松的样地总碳储量最大。
In order to clarify the effect of selective cutting area on the carbon storage of seedlings planted after group selective cutting and the effect of selective cutting and artificial regeneration on the carbon storage of shrub and litter under the inefficient forest of Larix principis- 0.03, 0.05hm2 pores in the artificial planting of young trees, as well as understory shrubs and litter changes in carbon storage were studied. The results showed that the biomass of Larix principis-rupprechtii planted by artificial regeneration increased with the increase of selective hole area, and the biomass of artificial regenerated Betula platyphylla reached the maximum value at the area of 0.03hm2. For the same species Under the selective cutting area, when the selective cutting area is 0.03hm2, the shrub biomass reaches the maximum. Under different selective cutting area, the biomass of the herbaceous plantation Larix principis-rupprechtii is higher than that of Betula platyphylla; The biomass of large and litter decreased gradually, and the biomass of litter in Betula platyphylla was higher. For carbon storage, the carbon storage of Betula platyphylla showed a decreasing trend with the increase of group-selective cutting apertures in the plots planted with the same tree species, while Larix principis-rupprechtii increased first and then decreased. Under the same selective cutting area, the total carbon storage of planted Larix principis-rupprechtii was higher than that of white birch, and when the selective-cutting hole area was 0.03hm 2, the total carbon storage of planted Larix principis-rupprechtii was the largest.