Influence of Tending Thinning on Productivity and Biomass in the Pinus Massoniana Plantation

doi:10.13466/j.cnki.lyzygl.2016.01.013

Abstract

Abstract: Biological productivity is an important symbol of the CO₂ source and sink in the atmosphere of the ecological system.The thinning plays an important role in changes of Productivity and biomass of Pinus massoniana plantation.On the basis of using different thinning intensities in Taijiang county of Guizhou province for twelve years,biomass of Pinus massoniana plantation and productivity effects were studied.Camp contour design randomized block experiment was made,four kinds of thinning intensity set up,namely T₀₀ [not thinning(0%),2016 strains/hm²],T₁₁ [mild(11%),1800 strains/hm²],T₂₂ [(moderate(22%),1566strains/hm²]and T₃₃ [strength(33%),1350strains/ hm²),through the continuous monitoring data of thinning in four years tree height of forest stand(diameter at breast height,stocking,volume and biomass and productivity per plant)is measured and calculated.The results show that the different thinning intensity,the sample average of T₃₃,T₂₂ and T₁₁ chest diameter at breast height,tree height and individual stocking net increment were greater than contrast T₀₀ sample,thinning four year average net productivity T₁₁(7 144.26 kg/(hm²·a))>T₂₂(6 803.35 kg/(hm²·a))>T₀₀(6 743.16 kg/(hm²·a))>T₃₃(5 816.09kg/(hm²·a)),but its growth rate was greater than T₀₀ sample area.T₂₂ thinning intensity stand average DBH and individual volume and contrast T₀₀ reached a significant level,and the annual average net productivity is greater than the contrast T₀₀,Pinus massoniana artificial forest plantation age stage to T₂₂ thinning intensity(1 566 strains/ hm^-2)management is the most suitable,most favorable to improving forest productivity.

Key words: thinning, plantation, productivity, biomass, Pinus massoniana

CLC Number:

S757

DING Bo, DING Guijie, LI Xianzhou. Influence of Tending Thinning on Productivity and Biomass in the Pinus Massoniana Plantation[J]. FOREST RESOURCES WANAGEMENT, 2016, 0(1): 72-77.

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