The accumulation and distribution rule of productivity and nutrient element were studied by determining the biomass and chemical element in different organs above ground of sample trees.
通过对样地水曲柳天然林的各器官生物量的测定和化学元素分析，研究了生物生产力及营养元素的积累与分布规律。
Effects of aluminum on nutrient elements absorption and distribution of both wheat cultivars seedlings were compared by the nutrient element determination and X-ray microanalysis.
采用元素含量测定和X -射线微区分析的方法，比较了铝胁迫对两小麦品种幼苗营养元素吸收和分布的影响。
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