After the pear harvest, many growers relax their management, which is easy to cause the nutrition of pear trees to fail to keep up, resulting in a decline in output. Therefore, after harvesting, it is necessary to supplement nutrition correctly, maintain the tree body and ensure a bumper harvest. The specific method is as follows.

1, root fertilization

After harvesting pear trees, root fertilization is beneficial to the recovery of tree vigor, the protection of leaves, the improvement of flower bud quality and the accumulation of nutrients for the next year's flowering and fruiting.

Generally, after picking fruit trees, fruit picking fertilizer should be applied to trees with many fruits and weak tree potential, mainly organic fertilizer and moderate ternary compound fertilizer.

For trees that don't bear fruit, base fertilizer should be applied only once in June 5438+ 10, and the application amount of base fertilizer generally accounts for 40-50% of the annual fertilization amount, and it should be applied according to the amount of 1 kg fruit 1 kg fertilizer.

2, foliar topdressing

Foliar topdressing has the characteristics of short time and quick effect. Through foliar topdressing, the tree can recover quickly, keep the leaves dark green and improve photosynthetic efficiency, which is beneficial to flower bud differentiation, flower bud fullness and tree nutrient accumulation.

Potassium dihydrogen phosphate and urea 0.3-0.5% are applied once every 65,438+00 days for 3-4 times in a row. Spraying in the evening is good for absorption and high in fertilizer efficiency.

3, autumn pruning

After the fruit is harvested, the long branches that have not stopped growing are pitted and the dense branches are thinned. On the one hand, it helps to concentrate nutrition and enrich the fruiting branches, and on the other hand, it improves the ventilation conditions of the orchard. However, attention should be paid to applying callus products in time after pruning to protect the healthy healing of wounds.

4, pest control

The main diseases of pear trees in autumn are pear scab and pear scab. These two diseases mainly harm leaves and directly affect the next year's output. After the fruit is harvested, it can be sprayed with chemicals in time, and carbendazim or Bordeaux mixture can be used.

Pests include red and yellow spiders, scale insects and red and yellow spiders.

It mainly harms leaves, seriously affects photosynthesis and nutrient accumulation, and can be controlled by avermectin, spirodiclofen and avermectin.

Scale insects mainly harm leaves, branches and fruits, and snail ethyl ester should be used for chemical control in time after fruit picking.

In addition, the following measures should be taken:

(1) Remove fallen leaves, rotten fruits and weeds around the orchard after picking, and collect them for fertilization or burning.

Many pathogenic bacteria and pests that harm fruit trees overwinter in litter and weeds, becoming the source of diseases and pests in the following year.

(2) Scraping bark can eliminate a large number of overwintering bacteria and pests lurking in the rough skin, warped skin and trunk cracks of fruit trees.

In winter or early spring, gently scrape off the old skin of fruit trees with a scraper or sickle, and then smear it on the trunk with chemicals to make the diseased skin fall off quickly and remove the source of germs.

Concentrate the scraped old skin and burn it.

Step 5 plow the garden

After picking the fruit, the pear orchard should be plowed, which can effectively loosen the soil, enhance permeability and reduce pests and diseases.

After ploughing, irrigate in time according to soil moisture.

Digging deep into the orchard in autumn and winter can turn the pests hiding in the soil layer under the crown to the ground for birds to peck or freeze to death.

In addition, deep tillage can also bury diseased leaves, dead fruits and pests hidden in hay deep underground, but it will be suffocated if it cannot be unearthed smoothly in the next year.

Finally, in addition to the above work, fruit trees should pay attention to heat preservation and antifreeze after defoliation, eliminate germs and pests that overwinter on the trunk, and protect trees from overwintering safely.

As long as the management of these pear trees after fruit picking is done well, the high yield and high quality of pear trees in the coming year can be guaranteed.

Post-harvest management of pear trees ends here. Welcome to read other agricultural contents of cucumber. com。

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