Although grapes are more drought-tolerant plants, it is still necessary to ensure three critical periods of irrigation. Irrigation: spring water germination; two irrigation: grapes fruit set after the expansion of water; three irrigation: frozen water before entering the winter.
"Winter irrigation without winter irrigation, production is reduced by half," said the importance of winter grape irrigation. What are the important roles of grape winter irrigation?
First, in northern China, the soil will freeze before and after the winter solstice. At this time, the anti-freezing effect after winter irrigation will make the topsoil into 1-2 cm clusters, which can reduce surface evaporation and facilitate the safe wintering of the roots and trees. The vines grow vigorously in two years.
Second, reduce the pests and diseases of grapes in the following year. After winter irrigation, the eggs and germs on the surface of the soil can be washed into ice water and frozen to death.
3. Accelerate the decomposing of organic fertilizers. Most fruit growers do not apply water or fill small water after applying base fertilizers. Winter irrigation can help the absorption of minerals by roots, increase the accumulation of nutrients by trees, and increase soil moisture content. Spring drought, improve the yield and quality of fruit trees.
Note: The winter irrigation time is from December to January of each year, that is, when the soil is just frozen or before freezing, the amount of irrigation water is about 70 square mu of land per mu and about 50 squares of other soil quality depending on the soil quality.
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Chloride is a common inorganic anion in water and wastewater. Chloride ions are found in almost all natural water,and their levels vary widely. In rivers, lakes. In marshes, chloride levels are generally low,but in seawater,salt lakes,and some groundwater levels can be as high as tens of grams per liter. In the human survival activities,chloride has very important physiological functions and industrial uses.Because of this,a considerable amount of chloride ions are contained in domestic sewage and industrial wastewater.
If the content of chloride ion in the book reaches 250mg without litres,the corresponding cation is sodium,will feel salty; High levels of chloride in water can damage metal pipes and buildings and hinder plant growth.
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