Herb layer coverage density was lower and the species fewer.

草本层的盖度和物种数偏低。

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Then the coverage and density equations of shrub layer, herb layer and main twelve plants are found by method of stepwise regression.

最后，建立了灌木层、草本层和十二种主要植物生长量与环境因子的数学模型。

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Then the coverage and density equations of shrub layer, herb layer and main twelve plants are found by method of stepwise regression.

最后，建立了灌木层、草本层和十二种主要植物生长量与环境因子的数学模型。

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