The improvement of saline-alkali land must be adapted to local conditions. The main distribution areas of saline-alkali land in China and the improvement and utilization methods of saline-alkali land are briefly described as follows:
Northeast: Soda-alkali soil quick-improving agent, deep loose technology, replenishing water and salt technology.
Northwest: Salt-tolerant and salt-tolerant crops, water-saving salt washing, plastic film covering salt suppression, and dark pipe drainage.
Coastal: Aquaculture, salt-tolerant cash crops, rice cultivation, etc.
The upper and middle reaches of the Yellow River: salt-tolerant crops, soil conditioners, and salt control measures such as drip irrigation under the membrane.
Huang-Huai-Hai Plain: There are good traditions, water-saving irrigation, lower groundwater level, salt-tolerant crops, etc. According to experts, the saline-alkali land is high in salt content and is not suitable for crop growth. It belongs to low-yield farmland and should be planted in a saline-alkali land based on a combination of improved soil, increased farmyard manure and planting salt-tolerant crops.
The first is to change the soil. It is recommended that soil be mixed with sand and 300 to 400 cubic meters of land per acre of Gaza.
The second is the use of farmyard manure, more than 2000 kilograms of mu, year after year application, improvement of soil, fertility and fertility. As far as possible without chemical fertilizers, when using chemical fertilizers, acidic fertilizers such as ammonium sulfate, potassium sulfate, and calcium superphosphate should be used to neutralize alkalinity. Potassium chloride should not be used because it will increase the alkalinity.
The third is planting alkali-resistant crops such as hemp, sunflower, sorghum, and pasture.
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