Detailed Explanation of Key Management Techniques for Growing Plum Trees in Greenhouses
How do you manage plum trees grown in greenhouses? Please allow me to introduce the key management techniques for greenhouse plum cultivation as follows: 1. Warming method after covering the greenhouse. After covering the greenhouse, raise the temperature gradually in three steps. Step one: during the day, "skip two, pull one," that is, pull up 1/3 of the straw curtains, and maintain this for about 1 week. Step two: during the day, "...
How do you manage plum trees grown in greenhouses? Please allow me to introduce
The key management techniques for greenhouse plum cultivation are as follows:
1. Warming method after covering the greenhouse.
After covering the greenhouse, raise the temperature gradually in three steps.
Step one: during the day, "skip two, pull one," that is, pull up 1/3 of the straw curtains, and maintain this for about 1 week.
Step two: during the day, "skip one, pull two," that is, pull up 2/3 of the straw curtains, and continue for 1 week.
Step three: during the day, pull up all the straw curtains; if the temperature is too high, ventilate to cool it down.
2. Irrigate thoroughly 20-30 days before mulching, and cover the tree with plastic film to increase ground temperature, reduce water evaporation, and lower humidity inside the greenhouse.
3. In early June and early July, spray paclobutrazol once each at concentrations of 800×10-6 and 1000×10-6, which can effectively control the canopy, inhibit growth, and promote flower formation.
4. Greenhouse cultivation lacks pollination vectors such as bees and wind. In addition to planting pollinizer trees, releasing bees during the flowering period also gives better results. Artificial pollination can also be used, and spraying 0.3% monopotassium phosphate during the young fruit stage; all of the above measures can significantly increase the fruit-setting rate.
5. For 2-3 year old plum trees, carry out girdling 1 month after flowering to inhibit the growth of young vigorous trees, increase the proportion of short branches, promote flower formation, and also advance the fruit ripening period. The girdling width should preferably be slightly less than 1/10 of the trunk circumference; if the girdling is too wide, the tree vigor will be weakened too severely, and if it is too narrow, the goal will not be achieved.
6. Pest and disease control. The main diseases of greenhouse plums are shot hole disease and scab, and two sprays of 1000-fold Taokong Jiasha can be applied along with foliar fertilizer; the main pests are scale insects and aphids, and 1000-fold Supusha can be sprayed 1-2 times after bud break.
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