Every growth process of apple trees is closely related to water. Therefore, timely and proper water supply is an important measure to ensure the normal metabolism of apple trees and high yield and quality. Insufficient or insufficient water supply will weaken the tree and cause serious damage to fallen leaves, rotten roots and trees. Insufficient soil moisture can significantly affect the rate of fruit set. Summer drought affects the growth of fruit trees and the formation of flower buds. Drought in autumn affects the level of nutrient accumulation in trees. However, excessive rain in autumn can easily cause new shoots to grow. The nutrient accumulation in the tree is less enriched and the ability to overwinter is reduced. Therefore, apple tree irrigation is especially important.
Drip irrigation is carried out by using a set of special equipment (pressure that can be pressurized by a water pump or using the pressure generated by the topographical drop), and then through the various water supply networks (including the main pipe, branch pipe, capillary tube and gate valve) to the dripper. The head is slowly dripped directly into the rhizosphere soil of the crop. After the water drops into the soil, a small saturated zone is formed under the dripper by means of vertical force infiltration, and then gradually spreads to the developed areas of the crop roots. Therefore, drip irrigation has many advantages: water saving is 1/2 of the amount of sprinkler irrigation, which is 1/3 or even less than the amount of ground irrigation; no land preparation is required; fruit trees have good growth results, high yield, excellent quality; management and labor saving, high efficiency .
Applying this technology on Apple can increase production by 35-60%. Drip irrigation technology can expand the irrigation area of water source (well spring, river, pond, etc.) and reduce the development cost of water source per unit irrigation area, which is of great significance to water-deficient areas and expensive water sources.
The configuration of the drip irrigation system can generally be used to lay 1 capillary tube between the fruit villages. The dripper with a flow rate of 4 liters/hour is installed every 1 meter on the capillary tube. The dense plantation can be placed at a distance of 0.5 meters before and after the fruit tree. head. In the general orchard, one drip is placed at 1 meter on both sides of the tree: the result tree has 4 drip heads per plant (1 m from the trunk); the tree or sticky soil can be increased by 5-6.
Apple drip irrigation system: The appropriate humidity control in the field is about 70% of the water holding capacity in the field. The dripping water is 1 time before flowering, the plant dropping 0.03-0.04 cubic meters; the dripping water is 1~2 times in the flowering stage, the plant drops 0.08-0.17 cubic meters; the fruit is swollen. The drip water is 5-8 times, the plant drops 0.15-0.2-cubic meter; the dripping water is 1 time in the mature period, the plant drops 0.02-0.05 cubic meters, the drip irrigation quota is 40-50 cubic meters/mu, under the condition of no rain, two dripping water The interval is 3-4 days. When using drip irrigation, care should be taken to purify the water and prevent the dripper from clogging. It is filtered with a 80-100 mesh nylon sieve water filter made of polyvinyl chloride. The dripper should be cleaned and overhauled frequently.