Planting density is the major factor that affected production of sweet sorghum stem and Seed and saccharinity.

种植密度是影响甜高粱茎，种子和糖精含量的主要因素。

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The ratios of stem, bark and branch biomass to total biomass of stand and individual tree are basically steady in different site index and planting density.

林分和单株的树干、树枝、树皮生物量组成比例均随立地指数、造林密度的变化无明显的差异。

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The results showed that most traits of stem bark were benefited from elevated CO2 and reduced with the increase of plant density, whether statistically significant or not.

结果表明，不论是否达到显著水平，树皮厚度、树皮基部横截面积和树皮体积均受到CO2升高的促进作用，但是受到种植密度升高的负作用。

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