密植对土壤养分环境的压力，造成多因子、多梯度的养分限制因子；
The high density planting affecting soil nutrinent environment causes nutrinent limitation from many factors and many stairs.
密植对土壤养分环境的压力，造成多因子、多梯度的养分限制因子；
The high density planting affecting soil nutrinent environment causes nutrinent limitation from many factors and many stairs.
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