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。
All organs, above and under ground, of a fruit tree is an unified organic body, In cold and dry regions, the growing period duration is short.
果树的地上下部是一个统一的有机体。干寒地区果树生育期短。
The results were as follows: planting types significantly influenced the free amino acid content in the different organs above ground and grain protein content after anthesis.
结果表明，稻麦套种对不同类型小麦花后地上部各器官游离氨基酸含量和籽粒蛋白质含量及其他品质指标有显著影响。
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