Key points of management techniques for plum cultivation in greenhouse

In order to explore the technique of early fruit and early harvest of plums cultivated in greenhouse, an experimental study was carried out from 1997 to 2000. The winter shed was fastened in the second year, and the plum 1000kg was produced in the fourth greenhouse in 2000. The output value is more than 10,000 yuan, and the mature period is about 60 days earlier than that of open field cultivation. Through the experiment, we summarized the key points of plum management techniques for cultivating plums in greenhouse. The brief introduction is as follows. For reference. The main contents are as follows: 1. The method of heating up after fastening the shed. After buckling the shed, it gradually heats up, which is carried out in three steps. The first step is to "pull one at two intervals" during the day, that is, pull up the grass curtain for about a week. The second step is to "pull two every other" during the day, that is, to pull up the grass curtain of 2, 2 and 3 for a week. The third step, pull up all the grass curtains during the day, the temperature is too high can be ventilated and cooled. 2. 20-30 days before plastic film mulching, sufficient water was filled, and plastic film was covered on the tree plate to increase the ground temperature, reduce water evaporation and reduce the humidity in the greenhouse. Spraying paclobutrazol of 800 × 10 ~ (- 6) and 1000 × 10 ~ (- 6) concentration in March, early June and early July respectively can effectively control crown, inhibit growth and promote flower formation. Recommended reading: spare housing gecko easy to get rich road 4, greenhouse cultivation lack of pollination media, such as bees, wind. In addition to the configuration of pollination trees, the effect of releasing bees at flowering stage should be better. In addition, artificial pollination can also be used to spray 0.3% potassium dihydrogen phosphate in the young fruit stage, all of which can significantly increase the fruit setting rate. The 5-and 2-3-year-old plums were girdled one month after flowering to inhibit the growth of young and prosperous trees, increase the proportion of short branches, promote flower formation, and advance the fruit ripening period. The width of girdling should be lower than 10 at the stem perimeter. The girdling is too wide and the tree potential is too weak to achieve the purpose. 6. Pest control. The main diseases of plum in greenhouse are perforation and scab, which can be killed by spraying 1000 times peach hole scab twice with foliar fertilizer, and the main pests are shell insects and aphids, which can be sprayed 1-2 times after sprouting at 1000 times speed.