The severe meteorological drought in Jiangxi has lasted for 69 days. Why did the dry weather last so long?
What is the difference between drought and drought?
Drought is usually due to the lack of rainfall for a long time, resulting in dry soil and less water, which is a long-term phenomenon. Drought is an accidental natural disaster. Generally speaking, due to the lack of soil water content, it can not meet the growth needs of food crops such as green feed, resulting in a relatively large disaster of limited production or no production. At this time, the amount of water can no longer meet the climate phenomenon of human survival and economic growth. Generally, it is a long-term phenomenon that long-term rainfall is less, resulting in dryness and less soil moisture.
However, drought is different. This is an accidental natural disaster. Generally speaking, due to the lack of soil water content, it can not meet the growth needs of food crops such as green feed, resulting in a relatively large disaster of limited production or no production. Even in areas with rich and diverse water resources, abnormal climate will lead to drought. Since ancient times, drought and drought have been the key natural disasters faced by people. It is particularly noteworthy that with the development of population economy and population expansion, water pollution is becoming more and more serious, which immediately leads to the increase of weather and arid climate and the intensification of drought. The development trend of drought has become a global concern.
How to prevent drought in advance?
The way to prevent and control drought is to plant trees, improve the ecological environment, build water conservancy projects and do a good job in farmland capital construction. On the one hand, we should be aware of the extreme importance of water to the life of green plants. We also need to realize that the temperate monsoon climate in China is characterized by uneven distribution of precipitation, and habitual floods and droughts will occur sooner or later. It is no exaggeration for China that water conservancy projects are the foundation of agricultural production. Advocating agricultural water-saving irrigation and improving water utilization rate, flooding irrigation will not only consume valuable water resources, but also continue to bring adverse harm.
The choice of sprinkler irrigation equipment, irrigation and underground irrigation can save a lot of water resources, and the actual effect will be better, neither more nor less. You can also choose to cover no-tillage technology, drought-tolerant varieties, and reform and innovate the planting system. Drought is usually caused by abnormal factors such as too little precipitation or high temperature, which is a natural phenomenon. Drought is the result of many factors. It is the superposition effect of nature and crustal movement. It is a special part of eco-environmental system software and socio-economic system in a specific space-time environment.