The rice germ is a natural nutrient resource and has vary high nutritive value.

米胚是一种得天独厚的天然营养源，具有很高的营养价值。

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Soil microbial biomass P is a valuable resource to plant P nutrient, and also play an important role in the transformaion of soil phosphorus.

土壤微生物生物量磷是植物磷素营养极其重要的来源，对土壤磷素的供给和调节起着重要作用。

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This is A important resource of potential nutrient of soil.

缓效养分，是土壤潜在肥力的重要来源。

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The cost to countries of nutrient over-enrichment from the degradation of their marine and coastal natural resource base, and the services and livelihoods it provides, will increase without improved policy responses.

UNESCO: Intergovernmental Oceanographic Commission