“GN”是“Gradient of Nutrients”的缩写，意思是“营养成分梯度”。
重要词汇
gradient n. 梯度，梯度率
双语例句
1、The results in this study recommed that the length and gradient of the slope should be considered in the soil nutrients management on sloping land.
因此，在坡地土壤养分调控中必须综合考虑坡度和坡长因素。
2、The analysis of the gradient characters of chemical properties of profile soil shows that， most of the content of nutrients represents characteristics of regular distribution， declining as the profile depth increases.
土壤剖面（A层、B1层和B2层）养分性质统计分析表明：坡面土壤剖面上的大部分养分指标含量表现出梯度规律性分布特征，即随土壤剖面深度的增加而降低。
