Dont apply too much nitrogenous fertilizer. Some farmers intercrop sweet potatoes among the pear trees. They cut the sweet potato vines to feed pigs and spill swine wastes on the soil. The pear trees grow big and tall, but they dont bear fruits even if they bloom. For these pear trees, nitrogenous fertilizer should not be applied, while phosphor and kalium fertilizer should be added. KDP should be furrow applied in the water dropping area of the crown and sprayed on the canopy.
Drain the waterlogging in the orchard. Some pear trees are planted in the farmland. The soil is deep and fertile. The bear trees grow well. But the drainage of the farmland is poor. It usually rains much during the anthesis. The growth is frustrated by the waterlogging so that there is few fruit or even no fruit. On that condition, gutters should be dug. It should be ensured that the trees are irrigated in drought and are not waterlogged in the rain.
Train and suspend the branches properly. Some bear trees overgrow. Cut off the bough and some main branches. Pull the dense branches with rope to the edge of the tree crown. This can control the overgrowing, enlarge the sunlit area and increase the lighting intensity, and is good for bearing fruits.
Plant more pollenizers. Pear tree is a kind of cross pollinating plant. The fruit bearing rate of single breed is low. Sometimes there is even no fruit bearing. The pollination and fruit bearing of pear trees can be advanced by pollenizers. The ratio of pollenizer and the original trees is 1:3.
Artificial pollination. The breeds that are highly appetent and have great amount of pollen can be selected as pollenizer. Gather the ripe anther that is about to split or just split, and dry it in the sun. Put a piece of newspaper under the anther. Collect the pollen when the anther splits. Then carry out artificial pollination.
Spray auxin. The fruit bearing rate can be increased by spraying auxin in the florescence. If the auxin is sprayed when the young fruits are expending, there will be less fruit dropping, and the weight of fruits will be heavier. Therefore, the quality of fruits can be improved and the output increased. There are many kinds of auxins, including 920, fruit-protecting element and Psd, etc.