nutrient fixation
相应地，当一定的植被建立后，可对土壤物理特性的改良和土壤养分的固定、转化、储存产生积极意义，提高土壤的整体质量。
Accordingly, some established vegetation made positive sense to improve soil physical property, and fix, convert and store soil nutrient, and then improve soil integrated quality.
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