不施氮处理土壤氮素矿化量在各生育期均显著高于施氮处理；
The soil mineralized N at each tobacco growth stage was significantly higher in the control than in the N fertilization treatment.
结果表明：淋洗有利于土壤氮素的矿化过程，但淋洗频率过快并没有造成土壤氮素矿化量的显著增加。
The results showed that: leaching was beneficial to soil mineralization, but the accumulation of the nitrogen mineralized in the soils would not be higher with increasing of the leaching fre...
具有达标元素较单一、水化学类型复杂、矿化程度较低、单井允许开采量相差悬殊且地域分布不均等特点。
It has characteristics as single standard element, complicated hydrochemical types, low mineralization degree, wide disparity in single well permissive yield and inhomogeneous distribution in space.
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