At present, citrus is in the physiological period of fruit drop, which is a critical period for determining the amount of fruit. High temperature and drought have seriously affected citrus production. Whether it is possible to obtain high-yield citrus production this year, it is of vital importance to win this citrus drought-resistance and production. The city's citrus experts have warned that the majority of citrus farmers should pay attention to the following drought-preventing measures.
Orchard irrigation. Ditch irrigation, that is, ditching between the rows of citrus gardens, and connecting with the water supply channels, the irrigation water seeps into the soil through the bottom of the ditch and the ditch wall. At present, this method is commonly used; disk irrigation, that is, making soil under the canopy dripping line, enclosing a disc, using dynamic water diversion, skin tube irrigation or artificial water picking for irrigation, after filling, loose soil cover, that is, cover up; sprinkler irrigation, ie In the orangery, using water pump, water pipe and nozzle, the water from the water tower or reservoir is sprayed into the citrus garden to form fine water droplets and then fall on the crown and the ground; drip irrigation, that is, water droplets or fine water flow The pipe slowly infiltrates into the root zone for irrigation.
Cover the moisturizer. Cover the tree tray with plant materials such as weeds and straws, and the covering should be kept at a distance of more than 10 cm from the rhizome. At the same time, the grass planting between the orchards can reduce the evaporation of water, reduce the temperature of the orchard, reduce and avoid the weeds and fruit trees competing for fertilizer and water, and enhance the drought resistance of citrus trees. Conditional citrus gardens can adopt shade covering technology. In case of high temperature and drought, the shade can be covered with a shade net to reduce the sun's radiation and reduce the temperature of the leaves, thus reducing the evaporation of water from the plants and preventing the burning of leaves and fruits by strong light radiation.
The branches are painted white. Citrus trees with few leaves and bare branches are prone to sunburn. Apply white paint to the main branches of the trunk to reduce radiant heat and prevent the trunk bark from being damaged by sunburn and secondary rot disease. Dead branches, dead trees.
Foliar spray fertilizer. During the drought-resistant irrigation process, pay attention to a small amount of nitrogen and potassium fertilizer application. For low-concentration foliar topdressing, foliar spray fertilizer is generally required to be applied 2-3 times to compensate for the lack of nutrients in the tree caused by high temperature and drought and the loss of photosynthesis ability of branches and leaves, and to reduce fruit drop. Severe citrus orchards, where appropriate, use pesticides or fungicides.
Pest control. Focus on the prevention and treatment of diseases such as scab, anthrax, resin disease, sunburn and other pests such as citrus fruit fly, cockroach, beetle, scale insect, rust tick.
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