The nitrogen cycle is arguably the second most important cycle, after the carbon cycle, to living organisms. Nitrogen is essential to plant growth, and therefore is a significant contributor to the human food chain, but its presence in the environment is strongly influenced by anthropogenic ...
The nitrogen cycle is the system by which nitrogen is converted into different chemical forms, some usable to humans and animals and some not, as it circulates among the atmosphere, the land and the oceans. Encyclopaedia Britannica/Getty Images/HowStuffWorks Living things require nitrogen for ...
Nitrogen fixation requires energy, enzymes and minerals, so if a plant available form of N is present, the crop will use it instead of fixing it from the air. When legumes are tilled into the soil, the N stored in their roots is released and made available to the next crop or lost ...
nitrogen cycle nitrogen cycle The continuous process by which nitrogen is exchanged between organisms and the environment. Some of the atmosphere's free nitrogen combines with other elements to form compounds that are deposited in the soil. These are then converted by bacteria, in a process called...
Describe the nitrogen cycle in your own words.Nitrogen:Nitrogen is present in 78% of the atmosphere. It is a colorless and odorless gas and is used as a refrigerant, in explosives, in making fertilizers. It is used in the preservation of food and is an important nutrient for plant growth...
atmospheric nitrogen (N2) 選擇正確的詞語 1 What drives assimilation 2 Step 2 3 Nitrogen fixation reactants 4 What drives ammonification 不知道嗎? 本學習集中的詞語(20) Step 1 Nitrogen fixation Nitrogen fixation reactants atmospheric nitrogen (N2) Nitrogen fixation products ammonia (NH3) or nitrat...
The global nitrogen cycle:Past,present and future Food and energy production converts N2 to reactive N species that cascade through environmental reservoirs and in the process impact human and ecosystem he... James,N Galloway,James,... - 《Science in China》 被引量: 77发表: 2005年 1Global ...
The ocean is home to a diverse and metabolically versatile microbial community that performs the complex biochemical transformations that drive the nitrogen cycle, including nitrogen fixation, assimilation, nitrification and nitrogen loss processes. In this Review, we discuss the wealth of new ocean nitro...
The chapter also addresses a series of nitrogen challenges, such as the question of how the marine nitrogen cycle appears to be able to maintain a relatively well-established homeostasis, that is, a balance between gains and losses of fixed nitrogen. Finally, it discusses the anthropogenic ...
Ward, The marine nitrogen cycle: Recent discoveries, uncertainties and the potential relevance of climate change. Philos. Trans. R. Soc. London Ser. B ... M Voss,HW Bange,JW Dippner,... - 《Philosophical Transactions of the Royal Society B Biological Sciences》 被引量: 110发表: 2013年 ...