nitrogen fixation

简明释义

氮固定

英英释义

例句

1.Understanding nitrogen fixation can help improve sustainable agricultural practices.

理解氮固定可以帮助改善可持续农业实践。

2.Certain bacteria in the soil perform nitrogen fixation, enriching the soil with nutrients.

土壤中的某些细菌进行氮固定，使土壤富含养分。

3.Farmers often plant legumes to promote nitrogen fixation in their fields.

农民常常种植豆类作物以促进他们田地中的氮固定。

4.The study of nitrogen fixation is vital for developing biofertilizers.

对氮固定的研究对于开发生物肥料至关重要。

5.The process of nitrogen fixation is essential for converting atmospheric nitrogen into a form usable by plants.

氮固定的过程对于将大气中的氮转化为植物可用的形式至关重要。

作文

Nitrogen is an essential element for all living organisms, as it is a fundamental building block of amino acids, proteins, and nucleic acids. However, the atmosphere is composed of approximately 78% nitrogen gas (N2), which is not directly usable by most organisms. This is where the process of nitrogen fixation (氮的固定) comes into play. Nitrogen fixation refers to the conversion of atmospheric nitrogen into a form that can be assimilated by living organisms, primarily ammonia (NH3). This process is crucial for the growth of plants, which are at the base of the food chain.There are two main types of nitrogen fixation (氮的固定): biological and abiotic. Biological nitrogen fixation (氮的固定) is carried out by certain bacteria and archaea, some of which have symbiotic relationships with plants, especially legumes. These microorganisms possess an enzyme called nitrogenase, which enables them to convert N2 into ammonia. The ammonia produced can then be used by plants to synthesize vital compounds necessary for their growth and development.On the other hand, abiotic nitrogen fixation (氮的固定) occurs through natural processes such as lightning or industrial processes like the Haber-Bosch method. Lightning provides enough energy to break the strong bonds of nitrogen molecules, allowing them to react with oxygen in the atmosphere to form nitrates, which eventually fall to the ground with rain. The Haber-Bosch process, developed in the early 20th century, synthesizes ammonia from atmospheric nitrogen and hydrogen gas, revolutionizing agriculture by providing a synthetic source of fertilizers.The significance of nitrogen fixation (氮的固定) cannot be overstated. Without it, the availability of nitrogen in a form that plants can use would be severely limited, leading to lower agricultural productivity and food scarcity. Farmers often rely on crop rotation and the planting of legumes, such as clover and soybeans, to enhance soil nitrogen levels naturally. This sustainable practice not only improves soil fertility but also reduces the need for chemical fertilizers, promoting environmental health.However, the excessive use of synthetic fertilizers, which are rich in nitrogen, has led to several environmental issues, including water pollution and greenhouse gas emissions. When fertilizers are washed away into water bodies, they can cause algal blooms, depleting oxygen levels and harming aquatic life. Therefore, understanding and promoting natural nitrogen fixation (氮的固定) processes is essential for sustainable agriculture and environmental conservation.In conclusion, nitrogen fixation (氮的固定) is a vital process that enables life on Earth by converting inert atmospheric nitrogen into usable forms for plants. Both biological and abiotic methods of nitrogen fixation (氮的固定) play crucial roles in maintaining the nitrogen cycle and supporting agricultural productivity. As we face challenges related to food security and environmental sustainability, it is imperative to continue researching and implementing practices that enhance natural nitrogen fixation (氮的固定) while minimizing the negative impacts of synthetic fertilizers.