- biological nitrogen
- 生物氮
English-Chinese Dictionary of Agriculture (英汉农业大词典). 2013.
biological nitrogen
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Nitrogen fixation — is the natural process, either biological or abiotic, by which nitrogen (N2) in the atmosphere is converted into ammonia (NH3).[1] This process is essential for life because fixed nitrogen is required to biosynthesize the basic building blocks of … Wikipedia
Nitrogen cycle — Schematic representation of the flow of nitrogen through the environment. The importance of bacteria in the cycle is immediately recognized as being a key element in the cycle, providing different forms of nitrogen compounds assimilable by higher … Wikipedia
Nitrogen — carbon ← nitrogen → oxygen ↑ N ↓ P … Wikipedia
Biological value — (BV) is a measure of the proportion of absorbed protein from a food which becomes incorporated into the proteins of the organism s body. It summarises how readily the broken down protein can be used in protein synthesis in the cells of the… … Wikipedia
Nitrogen dioxide — Nitrogen dioxide … Wikipedia
Nitrogen balance — is the measure of nitrogen output subtracted from nitrogen input.[1] Blood urea nitrogen can be used in estimating nitrogen balance, as can the urea concentration in urine. A positive value is often found during periods of growth, tissue repair… … Wikipedia
Nitrogen assimilation — is a fundamental biological process that occurs in plants and algae that are incapable of independent nitrogen fixation. The assimilation of nitrogen has marked effects on plant productivity, biomass, and crop yield, and nitrogen deficiency leads … Wikipedia
Biological interaction — Biological interactions are the effects organisms in a community have on one another. In the natural world no organism exists in absolute isolation, and thus every organism must interact with the environment and other organisms. An organism s… … Wikipedia
Nitrogen — Ni tro*gen (n[imac] tr[ o]*j[e^]n), n. [L. nitrum natron + gen: cf. F. nitrog[ e]ne. See {Niter}.] (Chem.) A colorless nonmetallic element of atomic number 7, tasteless and odorless, comprising four fifths of the atmosphere by volume in the form… … The Collaborative International Dictionary of English
Biological network — is any network that applies to biological systems. A network is any system with sub units that are linked into a whole, such as species units linked into a whole food web. Biological networks provide a mathematical analysis of connections found… … Wikipedia
nitrogen group element — ▪ chemical elements Introduction any of the chemical elements that constitute Group Va of the periodic table (see Figure >). The group consists of nitrogen (N), phosphorus (P), arsenic (As), antimony (Sb), and bismuth (Bi). The elements share… … Universalium
