In July, the grape is in the period of fruit enlargement and gradually matures. Within one month before harvest, it is a critical period for obtaining high quality and high yield. We must effectively grasp the management of fertilizer and water. Timely fertilization, nutrient supply is generally applied once in the early stage of fruit coloring, and is dominated by phosphorus and potassium fertilizers. Potassium sulphate three-element compound fertilizer can be used for soil application; it can also be sprayed together with pests and pests by means of extra-root fertilizer, increasing the nutrition of leaves and fruits, and 0.5% to 1% of potassium dihydrogen phosphate solution can be used for spraying. ~3 times. In order to improve the storability of grape berry, calcium fertilizer foliar fertilizer (such as Tricor calcium treasure 1000-1200 times) can be sprayed continuously within one month before harvest, which can significantly increase the calcium content of grape berry, thus Improve grape quality and calcium storage, also have a certain role in the prevention of cracking. Strengthen water management In order to guarantee the quality of grapes, it is required to strictly control irrigation within one month before harvest to prevent quality degradation. Before the advent of heavy rain, special attention should be paid to the prevention of flooding. For varieties that are prone to cracking, try to adopt measures such as mulching and covering grass to maintain a balanced supply of soil moisture.
Freeze Dried process is a method to freeze the dry liquid materials into solid and use the sublimation properties of ice under low temperature and pressure to dehydrate the materials and achieve the purpose of drying. Freeze-drying technology first appeared in the space field, and it is known to all that the space food has a high quality requirement, which is designed to meet the needs of the astronauts in space for the nutrition of fruits and vegetables. Because freeze-drying technology not only let the color, aroma, taste, nutrition of the food itself, but also make food more convenient to carry and transport. With the development of economy, freeze-drying technology has been applied to daily food processing, so the lyophilization process is also called aerospace food technology.
Freeze dried food is to use rapid freezing, vacuum dehydration method of ice, preserved the original color, aroma, taste, nutrition, and the appearance of the original material, the water content of only about 5%, because of the particularity of its craft, by freezing to break the cell wall, so crispy, nutrition, easy absorption
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