Growths and Biomass of Rubber
Five age classes’ rubber plantations 1, 5, 10, 15, and 20 years old were selected. For each age class stand, 3 40×40 m sampling plots were arranged in random, a total of 15 plots for all the plantations. The stem girth at 1.3 m above ground, height, and crown cover of all the rubber trees were measured in each plot. One rubber tree having the mean size in each plot was cut and separated for stem, branch, leaf, and root biomass. Fifteen trees of the different stand ages were used for making allometric equations. The biomass in a series of the plantations was calculated.
Growths and Biomass of Rubber Five age classes’ rubber plantations 1, 5, 10, 15, and 20 years old were selected. For each age class stand, 3 40×40 m sampling plots were arranged in random, a total of 15 plots for all the plantations. The stem girth at 1.3 m above ground, height, and crown cover of all the rubber trees were measured in each plot. One rubber tree having the mean size in each plot was cut and separated for stem, branch, leaf, and root biomass. Fifteen trees of the different stand ages were used for making allometric equations. The biomass in a series of the plantations was calculated.
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