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How to manage plum trees planted in greenhouses?
There are many varieties of plums, and the management methods are similar. The characteristic of plum, "self-sterility", that is, plum orchards of the same variety must be cross-pollinated. For example, different varieties are mixed, or temporarily suspended for cross-flowering, otherwise there is no yield. After selecting the planting site, excavation should be carried out according to the specifications planned in advance. Generally, the width should be kept at about 80 cm and the depth should be above 100cm. The specific depth can also be determined according to our local actual situation. In the first step, we need to choose a piece of land suitable for plum growth. Plums are generally planted in hilly areas, because there is a certain slope here, which can play a better drainage role.

Plum is bright, sweet and nutritious, and it is an excellent fresh fruit. Plum trees have a long history of cultivation in China, and there are many excellent varieties with local characteristics, such as vermilion plum, Huang Yu plum, late red plum, blackberry and honey plum. In spring, it is the time when plums breed flower buds and leaf buds, so water them once in time. This period is an important stage of nutrient demand, and it is necessary to apply organic fertilizer outside the roots. Applying 1 ~ 1.5 kg to each adult tree can make use of nitrogen fertilizer or 60 kg of decomposed human excrement and urine.

Generally, the plant spacing is 2.5m× 4m, which should be planted before bud germination (preferably before April 20th). Plum is not self-bearing, therefore, the cultivated varieties should not be single, and different varieties with the same flowering period should be planted as pollination trees at a certain distance, with a ratio of 4: 1 or 8: 1. Plum trees are generally cultivated by grafting and are called Chinese plums. Selecting a peach tree grafted with hair; Because after successful grafting, plum trees grow fast, bear fruit early, endure drought, and the fruit is big and sweet; However, plum trees grafted in this way are not resistant to moisture, prone to nodule disease, premature senescence of fruit trees and short life span.

Peach is a small leafhopper. A little peach leafhopper harms the leaves, and when it is serious, it makes the leaves grayish white, which leads to the weakening of the trees and early defoliation, leading to a reduction in production or even no harvest in the coming year. August-September is the period when the population of peach fruit borer is the densest and most harmful.