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In arid and semi-arid areas, because of less precipitation, mainly rely on groundwater, river water and other water sources to develop agriculture, in China is mainly distributed in the northwest of the Hetao Plain, Ningxia Plain and Hexi Corridor, the main crops are spring wheat.
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A model that ensures agricultural production by means of large-scale irrigation in times of drought. At this stage, water-saving irrigated agriculture should be developed. It generally refers to agriculture that irrigates the fields with water.
It is characterized by irrigation measures that meet the water needs of plants, regulate the temperature of the land and the nutrients of the soil to increase land productivity.
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Irrigated agriculture is a mode of ensuring agricultural production by irrigating large amounts of water in times of drought.
Irrigated agriculture generally refers to agriculture in which fields are irrigated with water. It is characterized by irrigation measures that meet the water needs of plants, regulate the temperature of the land and modify the nutrients of the soil to increase land productivity. Mainly through a variety of agricultural water conservancy irrigation facilities, to meet the needs of crops for water, adjust land temperature, humidity, soil air, nutrients, improve land production capacity.
It is a kind of agriculture with stable and high yields. Therefore, irrigation agriculture has developed all over the world, especially on both sides of major rivers, such as the Mississippi River in North America, the Amazon River in South America, the Changhechang Xun River in Asia, and the Nile River Basin in Africa.
China's irrigated agriculture has been developed since ancient times. As early as the early Warring States period, the Dujiangyan water conservancy project was improvised to irrigate a large area of farmland in the Chengdu Plain, which is still playing a role today.
Water-saving ways
1. Micro spraying is a form of irrigation that uses refraction, rotation or radiation micro sprinklers to spray water to crop branches and leaves, which belongs to the category of micro irrigation. The working pressure of micro-spraying is low and the flow rate is small, which can not only increase soil moisture, but also improve air humidity and adjust the local microclimate, which is widely used. In addition, with the help of the super atomization function of some micro sprinklers, Xunshi can be used for cuttings and seedlings, feeding farm cooling and other places.
2. Drip irrigation is a form of irrigation that drips water into the soil near the root zone of crops drop by drop, drip head, drip irrigation belt or other orifice irrigation device installed on the capillary tube. Due to the small drip flow, slow infiltration, and diffusion mainly by capillary tension, it is one of the most water-saving and effective irrigation methods.
3. Local precise irrigation greatly improves the utilization rate of water, reduces the breeding of weeds, improves the soil structure, and reduces the requirements for water pressure. At the same time, precise fertilization can be carried out through the first fertilization device, so as to truly achieve low input and high income.
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<> irrigated agriculture is characterized by increasing the productivity of the land by using irrigation measures to meet the water needs of crops, as well as regulating the temperature of the soil and the nutrients in the soil. Irrigated agriculture is a kind of stable and high-yield agriculture, and its agricultural methods are all over the world, especially on the banks of large rivers and rivers, such as the Mississippi River in North America, the Amazon River in South America, the Yangtze River in Asia, and the Nile River Basin in Africa.
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