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Global climate change has become one of the most serious environmental problems facing mankind, as the main terrestrial ecosystems, forest ecosystems play a huge role in the global carbon balance, carbon storage and density of forest ecosystems research has become one of the hotspots of ecosystem carbon balance. Ningxia Helan Mountain is located at the junction of the temperate steppe and desert region, northwestern China sandstorm typical temperate mountain forest ecosystems, Chinese pine species as the Helan mountains area built their carbon storage and density studies The analysis of the carbon sink function of the evaluation of the area is of great significance. Ningxia Helan Mountain Natural Pinus Helan Mountain Natural Pinus biomass conversion factor, the amount of biomass accumulation relational model, the relationship of the various components of the biomass volume, carbon storage and density characteristics study, the results showed that: 1. using 12 standard plot, Ningxia Helan Mountain Natural Pinus biomass conversion factor calculated results show that the Helan Mountain Natural Pinus biomass conversion factor varied between 0.77 and 1.39, with an average value of 0.89. aboveground biomass with volume changes in the relationship between the fitting analysis, and establish a correlation equation the Helan Mountain P. tabulaeformis biomass with the stock volume increases, and showed a significant linear relationship The correlation coefficient of 0.9874, and thus estimate the oil of pine forest biomass in the future, it is reasonable to use the related equation. 3. Helan Mountain P. tabulaeformis component biomass volume correlation exists trunk biomass and volume of the best correlation, the correlation coefficient of 0.9722, followed by the branches, the correlation coefficient was 0.9402, bark and leaves there are some correlation with the stock volume. . Helan Mountain forest inventory data, combined with biomass stocks are related equation to estimate the Helan Mountain natural oil pine forests of carbon reserves and carbon density, the results show that: 1) Ningxia Helan Mountain natural oil pine forest carbon reserves to 11.7262 × 104t, which, in The aged forest carbon reserves the 0.1371 × 104t, nearly mature forest carbon stocks 11.5891 × 104t. 98.8% of the total carbon reserves of nearly mature forest carbon stocks, middle-aged forest accounted for only 0.12%. Near mature forest, middle-aged forest carbon density of 36.46 t / hm2, 33.44 t / hm2. Carbon density increased with increasing forest age. 2) spatial distribution, the Ningxia Helan Alexander ditch management station oil pine forest carbon reserves 3.9726 × 104t, the Su yukou management station to 7.7358 × 104t, Malian port management station to 0.0181 × 104t Su yukou, management station 66.0% of the total carbon reserves of carbon stocks, accounted for only 0.2% of the Malian mouth; the carbon density management station port Malian largest, 39.31 t / hm2, and secondly as a the Su yukou management station and a large ditch management station. 3) For each component of the carbon stocks, regardless of different forest age, or a different area, are trunk of carbon reserves the largest proportion Sort: trunk gt; branches gt; leaves gt; bark carbon density trunk. Different measurement factors in correlation and ecological factors, and carbon storage, analysis, results showed that the maximum tree height and diameter of carbon reserves, with a clear correlation between the two. Stand age, density, tree height, diameter at breast height, canopy density and slope, and several other factors on carbon stocks significant difference analysis found that, Ningxia Helan Mountain Natural the oil pine forest carbon stocks by three factors stand age, tree height , have reached a significant level, the density of carbon stocks is not significant. Different ecological factors, canopy density and the slope of the carbon stocks were not significant.
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