Technical measures for planting pear trees without bearing fruit
1. Avoid partial application of nitrogen fertilizer some farmers plant pear trees and interplant sweet potatoes, they grow sweet potatoes in order to cut potato vines and raise pigs, so they often throw pig manure, pear trees grow tall and big, but do not bear fruit. This kind of pear trees should stop applying nitrogen fertilizer, increase phosphorus and potassium fertilizer, ditch and spray potassium dihydrogen phosphate at the dripping place of the crown.
two。 Excluding the orchard waterlogged pear trees planted in the field, although the soil layer is deep, fertile soil, pear trees grow well, but poor drainage. During the flowering period, Rain Water is generally too much and is frustrated by waterlogging growth, so that he seldom or even fails to bear fruit. In this case, drainage ditches should be well opened so that they can be irrigated in dry days and not stained in rainy days.
3. Some pear trees with proper pruning and hanging branches grow too much, so they should cut off the main branches and part of the backbone branches, and pull the dense branches to the edge of the crown with a rope. This can not only control the vegetative growth, but also increase the light area and light intensity, which is beneficial to the result.
4. Pear is a cross-pollinated plant, and the fruit setting rate of pollination in the variety is very low. Planting more pollinated varieties can promote the pollination and fruiting of pear trees, and the ratio of pollinated trees to original trees is 1 ∶ 3.
5. Artificial pollination selected varieties with strong affinity and large amount of pollen as pollination varieties, collected mature anthers that were about to crack or just cracked, dried them under astigmatism, padded newspapers, made anthers crack, collected pollen, and then carried out artificial pollination. Artificial pollination methods include manual pollination and liquid pollination. Artificial pollination is carried out according to the number of fruits left in each inflorescence. When pollinating, put the pollen in a vial, dip it in the pollen with a brush, and gently wipe it on the stigma of the flower. 10 flowers can be given each time you dip in the pollen. Liquid pollination is that every 25ml pollen is sprayed with 10kg of water, 1kg of sugar and 10g of boron fertilizer, which is required to be sprayed within 2 hours.
6. Spraying plant hormone at flowering stage can increase fruit setting rate, and spraying plant hormone at young fruit expansion stage can reduce fruit drop, promote fruit weight, improve quality and increase yield.
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Four points for attention in the introduction of pear trees
In recent years, Haimen City, Jiangsu Province has taken the planting of pear trees as an important starting point for getting rich in the adjustment of agricultural structure, popularized and planted more than 8,000 mu of high-quality pears, and achieved good benefits. Introduction is the key to pear planting. According to the experience of Haimen City, pear trees should be introduced.
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Management of late fruiting stage and senescence period of planting pear trees
After pear trees enter the later stage of full fruit and senescence, such as poor management, lack of fertilizer and water, excessive load, aggravation of diseases and insect pests, it will accelerate the senescence and death of pear trees, and lose the value of cultivation. First, the performance of pear trees in the late fruiting stage and senescence stage: yield year by year
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