Under different conditions of soil moisture, seedling root vigor was studied for major tree species planted in the Weibei Loess Plateau by means of a pot experiment.
采用盆栽试验的方法，研究了不同土壤干旱条件下渭北主要造林树种苗木根系活力的变化。
Root vigor of the seedlings was affected not only by the degree of soil moisture, but also adapt the drought in short time and the root vigor had a high level.
苗木的根系活力不仅与土壤含水量有关，而且能在短时间内适应干旱，从而维持较高的根活力水平。
Root vigor was affected not only by the degree of soil drought but also by the duration of soil moisture.
苗木根系活力除了受土壤干旱协迫程度的影响之外，还受到干旱持续时间的影响。
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