Management of citrus after harvest "four timely"

In recent years, citrus has been slow-moving because of the “sweet mandarin oranges,” and the economic efficiency of orange farmers has been frustrated. Many citrus farmers have therefore abandoned citrus production. In the recent period, the sales of citrus have picked up. Some fruit growers who insisted on the unrelenting production of citrus have returned to a "golden doll," and those who gave up citrus production have regretted it. Here, the author's warm reminder: The majority of fruit farmers should not relax the citrus production, do a good job of current management, and seize the increase in citrus production next year. After the citrus fruit is picked, it is the period when the citrus fruit is loaded with nutrients to restore the tree vigor, accumulate nutrients, and enter the flower bud differentiation stage. From the physiological point of view, it is related to the amount of flower and flower quality in the next year. This period of management should be "four timely":

- Timely fertilization of citrus early maturing varieties, such as Miyagawa, Hingjin, Yamashita Red, etc., should be applied immediately after fruit picking; tail Zhang, 崭獭 崭獭 2 2 2 2 郑 郑 郑 郑 郑 郑 郑 郑 郑 郑0 days should be fertilized, mid-late-maturing varieties have no fertilization before picking, and should grab winter fertilizer after picking. The type of fertilizer to be applied to the full consideration of NPK, mainly organic fertilizer. Generally rich tree planting rapeseed cake fertilizer 1 to 1.5 kg + calcium magnesium phosphate fertilizer 0.5 kg + urea 0.15 to 0.2 kg, or potassium sulfate compound fertilizer 0.4 to 0.5 kg. Strong growth of orange trees can reduce the amount of nitrogen fertilizer; orange trees with poor growth potential can increase the amount of nitrogen fertilizer. The fertilization method is: in the canopy dripping line depth of 15 to 20 cm deep groove or half moon-shaped groove or strip groove burying, and then each plant splash 1 Shochu liquid.

- Timely clearance of gardens and gardens is an integrated measure to control pests and diseases in orchards and must not be ignored. After picking, timely picking up the ground fruit, concentrate deeply, and sprinkle a layer of lime or carbofuran granules after the insect fruit is in the pit, then cover the soil 0.5 meters to prevent the fruit fly from entering the soil in the Orangery. At the same time, remove the branches, dead branches, fallen leaves, etc., and apply 50 to 75 kg of lime per acre. From December to January, the whole park sprayed 1 or 2 times of 45% crystal lime sulfur 180 times + 2,4-D (10 to 15 mg per kilogram of water).

- The timely turning of soil and deep-falling garden soil in winter is the first measure to control the fruit fly. All orange groves that have been afflicted by big fruit flies, either in the new victim gardens or in the old victim gardens, must turn the garden soil deep once in a row, with a depth of 7 to 10 centimeters. The clods do not have to be finely sliced ​​and the unfertilized orange groves are Can be applied to basal fertiliser, and after 20 to 30 days, break up the large pieces of earth that have been excavated. A portion of the maggots can be killed directly by deepening the garden soil, turning into deep pods, and the eclosion rate is low. The maggots that emerge from the ground can be eaten by the birds, thereby reducing the worm population.

——When the citrus is picked up in time, the moisture of the tree loses its balance. In case of drought, the orange juice should be timely watered to prevent the leaves from curling, withering and falling off.

In addition, we must also do a good job in winter pruning and do a good job in cold and frost protection work.

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