Symptoms Soil salinity and pH have a great influence on the growth and development of corn, causing salt and alkali damage. In salt, chloride ion is the most harmful to corn. Seedlings at the jointing stage and booting stage have poor salt tolerance. The seedling stage shows thin growth, and when it is severe, it is nearly withered. Alkali damage mainly affects the young roots and shoots of corn. Light plants increase the amount of empty stalks of corn and it is easy to fall down. In severe cases, the seedlings are short of ridges and ridges. At the same time, calcium, manganese, zinc, iron, boron and other micronutrients are fixed to cause deficiency. disease. Prevention and control methods The prevention and control of corn salinization is mainly to improve the soil. (1) Improved salt-alkali soil of cultivated rice Under favorable conditions of irrigation and irrigation, low-lying soils are easy to deplete saline-alkali areas, and the development of rice is a successful experience in the improvement of saline-alkali soil. (2) Siltation and siltation for dredging and flooding improvement of saline-alkali and sand-debris is labor in northern China. 2L-size Carrot,2L-size Fresh Carrot,Fresh Carrot Size 2L,2L-size Red Color Carrot Yirun Agricultural Cooperative , https://www.yiruncn.com
Effluent salt-alkali soil has higher concentration of soluble salts, inhibits corn water absorption, reverse osmosis occurs, produces physiological dehydration and causes blight; some salts inhibit beneficial transformation of nutrients by beneficial microorganisms and make the seedlings thin and weak. Alkali damage is mainly due to the presence of substitute sodium ions in the soil, which deteriorates the soil properties and affects the respiration and nutrient absorption of the maize root system.
A successful experience created by the people. (3) Leveling land Land is uneven is one of the important reasons for the formation of salt and alkali. (4) Salt washing and salt irrigation improvement measures In areas with water conservancy conditions, the salt and alkali land can be improved by flushing. (5) Chemically modified saline-alkali land has a large area of ​​soda salinized soil and alkaline earth, which can be combined with the local conditions, and the lime sedimentation slag, phosphogypsum, urea, formaldehyde resin, and alkali industrial Waste, calcium chloride, black sorghum, and humic acid fertilizers were modified. In addition, the increase of soil organic matter and other fertilization measures and improve the summer index, a reasonable rotation and other biological measures can also effectively improve the saline-alkali soil. The improvement of saline-alkali soil is a persistent and urgent task to be solved, and all localities must unremittingly develop it.