000			02133nam a2200253Ia 4500
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100			_aSone K
245		0	_aCarbon sequestration, tree biomass growth and rubber yield of PB 260 clone of rubber tree (Hevea brasiliensis) in North Sumatra
260			_bJournal of Rubber Research _c2014
300			_a115-127
500			_aSource Year: 2014
520			_aIt is desirable to supply the rising demand for industrial crop materials without increasing the amount of land cultivated for crops, if possible. Quantitative information about biomass growth and carbon sequestration by crops is fundamental knowledge that can be used to improve crop yield per unit of cultivation area. In the present study, measured trunk diameter, tree height and biomass of a PB 260 clone of the Para rubber tree, Hevea brasiliensis (Willd.) Muell. Arg. The natural rubber from this tree is used mainly to make tyres and is one of the most important industrial crop materials. Also measured the soil carbon in stands that had been planted from two to 20 years earlier in northern Sumatra, Indonesia. The biomass of each tree was estimated from the measurement of the trunk diameter and these data were combined with the rubber yield data in order to estimate the amount of carbon sequestered annually by the estate as a whole.The tree biomass growth and rubber yield rates peaked at eight and ten years after planting, respectively. After that point, the tree growth rate declined more rapidly than the rubber yield rate. As a result, the percentage of the trees overall biomass composed by rubber consistently increased from 5;in a three year old tree to 40;in a 20 year old tree. The estimated annual carbon sequestered as tree biomass and as rubber were 4.2 tC ha-1 year-1 and 1.9 tC ha-1 year-1, respectively.
650			_aAllometry
650			_aBiomass
650			_aCarbon sequestration
650			_aPB 260 clone
650			_aRubber yield
650			_aTrunk diameter
700			_aGyokusen K
700			_aHosaka T
700			_aTakase M
700			_aWatanabe N
942			_cJS
999			_c55181 _d55181