A Detailed Explanation of the Latest Control Methods for Salt and Alkali Damage in Corn
Salt and alkali damage in corn is a disease caused by its relatively high soluble salt content. It inhibits the absorption of corn, causing a reverse osmosis phenomenon, resulting in physiological dehydration and causing the corn to wilt. So how should salt and alkali damage in corn be controlled? Follow the editor and take a look.
1. Symptoms
Soil salinity and pH have an enormous impact on the growth and development of corn. Salt and alkali damage can be removed. Among the salts, chloride ions cause the greatest harm to corn. Salt tolerance is relatively poor at the seedling stage, jointing stage and booting stage. At the seedling stage, the plants appear thin and weak, and in severe cases are close to wilting. Alkali damage mainly affects the young roots and young buds of corn. In mild cases, it increases the number of empty stalks in corn and makes it prone to lodging; in severe cases, it causes missing plants and broken rows. At the same time, it can also cause trace elements such as calcium, manganese, zinc, iron and boron to be fixed, triggering deficiency symptoms.
2. Causes of the disease
The salt concentration in salinized soil is relatively high, which seriously affects the absorption of water by corn, causing a reverse osmosis phenomenon, producing physiological dehydration, and causing corn plants to wilt. Certain salts inhibit the effective transformation of nutrients by beneficial microorganisms, making seedlings thin and weak. Alkali damage is mainly due to the presence of exchangeable sodium ions in the soil, which deteriorates soil properties and effectively affects the absorption by corn roots and nutrient uptake.
3. Control methods
First, the salinization and alkalization of the soil must be changed. Saline-alkali soil can be improved by planting rice. Where drainage and irrigation conditions are good, in low-lying, flood-prone saline-alkali areas, developing rice cultivation is a successful experience in improving saline-alkali land. In the north, diverting floodwater and silt to improve saline-alkali land and sandy wasteland is a successful experience created by working people. In areas with water conditions, washing methods can be used to improve saline-alkali land. In saline-alkali land, there are large areas of soda-salinized soil and alkaline soil. According to local conditions, gypsum or sugar factory lime precipitation residue, phosphogypsum, urea, humic acid fertilizers, etc. can be used to improve them. In addition, measures such as increasing the application of organic fertilizer to build soil fertility and rational crop rotation can also effectively improve saline-alkali land.
The above is an introduction to the control methods for salt and alkali damage in corn. We hope it can help you. If you want to learn more related knowledge, please stay tuned to us.