关键词 : 有机高氮肥 ; 菠菜 ; 土壤供氮 [gap=1845]Key words : organic fertilizer ; spinach ; soil nitrogen supply
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amount of soil nitrogen supply 土壤供氮量的
soil nitrogen supply modes 土壤供氮特征
soil nitrogen supply capacity 供氮能力
Using traditional techniques such as crop rotation, compost and manure to supply the soil with nitrogen and other minerals would have required a tripling of the area under cultivation.
如果采用传统技术如轮作和堆肥为土壤补充氮和其他物质，就需要耕地也增长三倍了。
Soil microbial biomass N also involved in nitrogen supply to crop.
土壤中微生物氮也参与了对作物的供氮过程。
The nitrogen mineralization - immobilization turnover(MIT) process in soil is closely connected with the capacity of nitrogen supply to plant and the loss of nitrogen to environment .
土壤氮矿化-固持周转（MIT）过程与土壤供氮力及氮素损失间存在密切关系。
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