Allocation Models of Biomass of Legume and Grass Forages of Artificial Grassland in Desert Steppe

China Rural Water and Hydropower ›› 2014 ›› (5) : 1-6.

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Analyzed and established the allocation of above- and below-ground biomass allocation models using legume and grass forages aboveground, underground biomass and root length data of artificial grassland in desert steppe .The results showed that above- and below-ground biomass allocation of two forages were obviously different. Legume forages biomass were significantly higher than grass forages, fitting parameters R2 was better than that of grass forages which means the allocation patterns between above-and belowground biomass were similar at both levels and indicated an isometric allocation relationship between above- and below-ground biomass. However, relationships between the root and the shoot of grass forages characterized by the allometry model, their correlation coefficients were larger than 0.3680 with a bias against the predicted modes of WBE. Legume forages allocated more biomass into roots with root / shoot (R/S) ratio of 0.75 which was close to the average of R/S ratio of China(0.78), On the contrary, grass forages allocated more biomass into shoots with R/S ratio of 1.73 which was significantly higher than 0.78. Two different size of individual forages R/S ratio were obvious plasticity, showed the intraspecific and interspecific differences, and R/S ratio of these legume and grass forages accord with the results predicted with the optimal theory and model. The R/S ratio of legume forages became smaller with the increase of individual, and the trends were opposite in grass forages. The biomass as well as its component were more relevant to root length, and the cubic curve was the optimal predictive model with correlation coefficient between 0.5112 and 0.9060

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. Allocation Models of Biomass of Legume and Grass Forages of Artificial Grassland in Desert Steppe. China Rural Water and Hydropower. 2014, 0(5): 1-6

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Received	Revised	Published
2013-12-06	2013-12-13	2014-05-15
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2015-04-09

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