Causes and countermeasures of spring drought in North China

The natural causes of spring drought in North China Plain are:

1, the rain belt has not yet arrived before spring, and the precipitation is less;

2. In spring, the temperature rises rapidly and the evaporation is large; ?

3. Agricultural water consumption increased in spring.

Social reasons:

1, when crops enter the growth period, the water demand is large, and the agricultural water consumption increases;

2, industrial production and domestic water consumption increased, resulting in water shortage.

Governance measures:

1, reasonable groundwater extraction; Building reservoirs and other water conservancy projects; Inter-basin water transfer;

2. Artificial precipitation enhancement and seawater desalination; Developing water-saving agriculture; Industrial water recycling;

3. Raise public awareness of water conservation.

The simulation experiment on the influence of spring drought year type in North China on winter wheat was expanded, and the following conclusions were drawn:

1, spring drought delayed and destroyed the normal growth and development of winter wheat, and accelerated the aging process of plant organs.

2. With the increase of spring drought years, the number of winter wheat roots decreases, the dry weight of roots decreases, and the growth rate of roots decreases, which is not conducive to the absorption and utilization of soil moisture by roots.

3. With the increase of spring drought years, the leaf area of winter wheat decreased, the number of green leaves decreased, the number of yellow leaves increased, and the plants were obviously dwarfed; The experimental observation shows that annual treatment of severe spring drought can obviously precocious.

4. With the increase of spring drought years, the dry weight and total biomass of winter wheat stems and leaves gradually decreased.

Baidu Encyclopedia-Spring Drought in North China