According to agricultural experts, ecological agriculture refers to an agricultural development model that follows the laws of ecology and ecological economics, uses systems engineering methods and modern science and technology, and conducts intensive management on the premise of protecting and improving the agricultural ecological environment. Ecological agriculture is an agricultural ecological economic composite system that integrates the agricultural ecological system and the agricultural economic system to achieve the greatest overall ecological and economic benefits. It is also a large-scale agriculture that integrates agriculture, forestry, animal husbandry, sideline and fishery industries. It is also a modern agriculture that integrates agricultural production, processing and sales and adapts to the development of market economy.
Ecological agriculture requires the coordinated development of agricultural development with its resources, environment and related industries, emphasizing local and timely conditions in order to rationally distribute agricultural productivity, adapt to the best ecological environment, and achieve high quality, high yield and efficiency. Ecological agriculture can rationally utilize and multiply agricultural natural resources, pay attention to improving the utilization rate of solar energy and the conversion efficiency of bioenergy, optimize the allocation between organisms and the environment, and have a reasonable agricultural ecological economic structure, so that the ecology and economy can be benign. circulation and enhance the ability to resist natural disasters.
The main contents of ecological agriculture construction include: grasping the basic ecological and economic situation through surveys and statistics, diagnosing and analyzing agricultural ecological economic systems, carrying out ecological agricultural zoning and engineering optimization design of agricultural ecosystems; adjusting land Utilize the structure and agricultural economic structure; give priority to protecting the agricultural ecological environment, build ecological projects, rationally utilize and increase agricultural resources, and improve the agricultural ecological environment; design and Implement appropriate ecological agriculture models; develop solar energy, small water conservancy and hydropower, wind power, biogas and other clean energy sources; recycle agricultural waste into resources, carry out multi-level comprehensive and recycling of them, and achieve pollution-free clean production; improve agricultural ecology The economic system should be scientifically regulated and modern intensive management should be implemented.
What do people use wind power to do in their daily lives?
1. Benefits to agricultural production: Wind is one of the environmental factors in agricultural production. Moderate wind speed plays an important role in improving farmland environmental conditions. Near-surface heat exchange, farmland evapotranspiration, and transport processes of carbon dioxide and oxygen in the air accelerate or intensify as wind speed increases.
2. Help plant pollination and reproduction: Wind can spread plant pollen and seeds, helping plants to pollinate and reproduce. The prevailing monsoon in China is beneficial to crop growth.
3. Wind energy as a new energy source: Wind energy is a widely distributed and inexhaustible energy source. In the Inner Mongolia Plateau, Northeast Plateau, Southeast Coast and inland mountains, there are abundant wind energy resources that can be developed and utilized as energy.
Extended information:
Generation of wind
p>In the equatorial and low latitude areas, the sun's altitude angle is large, the sunshine time is long, the solar radiation intensity is strong, and the ground and atmosphere receiveThere is a lot of heat and a higher temperature; in high latitudes, the sun's altitude angle is small and the sunshine time is short. The ground and atmosphere receive less heat and the temperature is low.
This temperature difference between high latitudes and low latitudes forms a pressure gradient between the north and the south, causing the air to move horizontally. The wind should blow in the direction of the horizontal pressure gradient, that is, perpendicular to the isobars. Blow from high pressure to low pressure.
The earth is rotating, and the force that deflects the horizontal movement of the air is called the geostrophic deflection force. This force deflects airflow to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. Therefore, in addition to the pressure gradient force, the movement of the earth's atmosphere is also affected by the geostrophic deflection force. The real movement of the atmosphere is the result of the combined influence of these two forces.
1. Wind lifting:
Wind lifting has been widely used since ancient times.
2. Wind power generation:
Wind power generation usually has three operating modes:
(1) It is an independent operation mode, usually a small generator is used to generate electricity. One or several households provide electricity, which uses batteries to store energy to ensure power usage when there is no wind.
(2) Wind power generation is combined with other power generation methods (such as diesel engine power generation) to provide power to a unit, a village or an island.
(3) Wind power generation is integrated into the conventional power grid to provide power to the large power grid. Often dozens or even hundreds of wind turbines are installed in a wind farm, which is the main development direction of wind power generation.
3. Sail to assist navigation:
In the development of today's motor boats, in order to save fuel and increase speed, ancient sails have been developed.
4. Wind heating:
With the improvement of people's living standards, the demand for heat energy in household energy is increasing, especially in high latitudes in Europe and North America. Drinking water is a major energy consumer. In order to solve the heat energy needs of households and low-level industries, wind heating has been greatly developed.
Extended information:
Wind energy advantages and disadvantages
1. Advantages
Wind is a clean energy source. Wind energy installations have become more advanced, mass production has reduced costs, and in the right locations, wind power is now less expensive than other generators. Wind energy facilities are mostly non-three-dimensional facilities that can protect the land and ecology. Wind power is a renewable energy source that is environmentally friendly and clean. Wind power is energy-saving and environmentally friendly.
2. Disadvantages
The ecological problem of wind power is that it may disturb birds. For example, the grouse in Kansas, USA, have gradually disappeared after the emergence of windmills. The current solution is offshore power generation, which is more expensive but also more efficient.
In some areas, the economics of wind power generation are insufficient, and the wind in many areas is intermittent. What is worse is that in places such as Taiwan, there is less wind in summer and during the day when power demand is high. time; must wait for the development of energy storage technologies such as compressed air.
Wind power generation requires a large amount of land to build wind farms to produce relatively large amounts of energy.
When wind power is generated, the wind turbine will make a lot of noise, so it is necessary to find some open space to build.
Current wind power generation is not yet mature and there is still considerable room for development.
Baidu Encyclopedia-Wind Energy