Estimating individual above-ground biomass of Leymus chinensis plants

doi:10.11686/cyxb2015053

Abstract

Abstract: Biomass is an important component of grassland ecosystem productivity. Models able to describe the productivity of the main plant species in grassland offer the potential to estimate aboveground biomass without physical cutting. In this research the relationships among plant characteristics (leaf number, leaf length×leaf width, stem diameter, stem height and plant height) and individual above-ground biomass was analyzed, subsequently those characteristics able to best predict changes of individual above-ground biomass were selected for modelling. Ninety Leymus chinensis plants were sampled in June (early growing season), July (middle growing season) and August (late growing season), respectively, and total of 270 observations were used to build models able to estimate individual plant above-ground biomass. Equations were obtained using regression analysis using Minitab 16.0, and T-Test analysis was used to compare observed and predicted values. The results showed that leaf length×leaf width and plant height could describe individual above-ground biomass of L. chinensis plants; model Y=-0.193+0.009X₂+0.011X₅ (X₂ indicated leaf length×leaf width,X₅ indicated plant height, P<0.01, R²=0.854).

HU Jing, HOU Xiang-Yang, SA Ru-La, GUO Feng-Hui, DING Yong. Estimating individual above-ground biomass of Leymus chinensis plants[J]. Acta Prataculturae Sinica, 2015, 24(8): 211-217.

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