nitrogen cycle

Adsorption of sediments on NH~+_4-N is one of the key biogeochemical processes, which plays an important role in the cycle of nitrogen in an estuary and tidal flats.

沉积物对NH4+-N的吸附是氮素生物地球化学循环的关键过程之一，它在河口潮滩生态系统内氮素循环过程中起着非常重要的作用。

Accumulation and biological cycle of nitrogen and phosphorus in Pinus taiwanensis community in Wuyi Mountains

福建武夷山黄山松群落的氮、磷累积和循环

Natural gas liquification involves both mixed-refrigerant cycle and nitrogen expander cycle.

近几年国内天然气液化技术主要采用混合工质液化循环和氮膨胀液化循环.

If this nitrogen cycle repeated elsewhere, many of the world's forest won't be absorbing much CO 2.

如果这种氮循环不断重复进行, 那么世界上很多森林都不能再吸收二氧化碳.

Effect of Seaweed Extract on Nitrogen Cycle in Eutrophic Water

海藻提取物对富营养化水体氮素循环影响研究

Cyanobacteria extensively distributed in inland and ocean water are very important for carbon and nitrogen cycle.

蓝藻在水体中分布广泛,对水体中碳、氮循环起到重要作用.

Thermal cycle design of liquid nitrogen engine

液氮发动机的热力循环设计

It was found that the immobilized nitrogen cycle bacteria also have purificatory effect on eutrophic water of Taihu lake in winter ( 7 ℃), the removal efficiencies for Total N ( TN), NH+ 4 N were 55.6%, and 58.9%, respectively.

固定化氮循环细菌在冬季低温（7℃）条件下仍保持了较高的除氮能力，总氮和氨氮去除率分别为55.6%，58.9%。

Effects of Compound Microbes Preparation on Variety of Nitrogen-Cycle Bacteria in Pond Water

复合微生态制剂对池塘水体氮循环细菌动态变化的影响