Fertility and nutritional characteristics The roots of the grapes are developed, the roots are mainly distributed in the 40-60 cm soil layer, and the roots of the dryland grapes can be as deep as 4.5 meters. The grape roots have no obvious dormancy period. They can grow all the year under suitable conditions. When the soil temperature is 6～9°C, soil moisture and nutrients are absorbed. At 12～13°C, new roots are developed and new roots grow. The suitable temperature is 21-28 ° C, and the soil temperature exceeds 32 ° C. The root system grows slowly. The roots of the grapes have two growth peaks in a year, the first in spring and summer (5 to 6 months) and the second in autumn (9 to October). As a result, the grapes are in a perennial cycle and go through the following stages: The sap flow period: from the spring sap flow to the bud sprouting, its important feature is the secretion of wound fluid from the tree body wound, indicating that the root system begins to move. From germination to flowering: from late April to early May, about 25 to 55 days. During this period, the temperature and ground temperature gradually increased, the inflorescences in the buds rapidly differentiated, the new shoots began to grow rapidly, the leaves unfolded, the new shoots (main shoots) grew to a certain length, and the shoots began to occur between the leaf axils, before flowering. New shoots can grow to about 60% of the total length of the year. This period, such as undernutrition or drought, will seriously affect the output, quality and results of the next year. Flowering period: from the beginning of the flower to the end of the flowering period, from the upper and middle of June, about 5 to 14 days. It is the peak of fruit drop about 9 days after the flowering. The tree is weak, the vegetative organs are too long, or the long-term rainy or low temperature will cause a lot of fruit drop. Berry growth period: from the flowering period to the berry ripening period before the berry ripening, entering from June, going through 2 to 3 months. In this period, if the nutrient supply is insufficient, it is easy to cause the young fruit to fall off. It is very important to improve the nutrient condition of young fruit by taking fertilization during this period. Mature and defoliated stages: from ripening of berries to leaves. During this period, the leaves continue to produce nutrients and are transferred to roots and branches for storage. At this time, the starch accumulation increases, the water decreases, the cell concentration increases, and the new shoots continue to be fully and lignified from top to bottom. The more fully this stage is carried out, the better the new shoots and buds mature, and the stronger the cold resistance of the plants. This period of fertilization is beneficial to the branches and buds, laying the foundation for the next year's Fengdeng. Dormancy: From the deciduous to the beginning of the next spring, the life of the grape plant is greatly reduced. According to the study, each kilogram of fruit produced by the grape (5-year-old) needs to absorb nitrogen (N) 6.0 kg, phosphorus (P2O5) 3.0 kg, potassium (K2O) 7.2 kg, and its absorption ratio is 1:0.5:1.2, with potassium>nitrogen > Phosphorus. The most nitrogen-demanding period of grapes is from May to September. It is the rapid growth of new shoots, flowering and fruiting and flower bud differentiation. Nitrogen deficiency causes growth retardation, fruit dysplasia, and poor flower bud differentiation, which not only affects the season's output. Affect the next year's output. The highest content of phosphorus in the young part of the plant and the sufficient phosphorus supply in the early stage of growth can promote the ripening of the branches and the differentiation of flower buds, increase the rate of insemination and reduce the fruit drop. The demand for potassium in the whole growth period of the grapes is relatively large. This article URL: Grape red fertilization technology! Is a large amount of elemental water soluble fertilizer suitable for crops such as grape red? Water Soluble Powder/Powder,Albendazole And Ivermectin Powder,Doxycycline Hyclate Soluble Powder,Pulsatilla Chinensis Sichuan Aibang Weiye Biological Engineering Co., Ltd. , https://www.aibangpharm.com