1, single vine pruning
That is, only one main vine is retained, and all other side vines are removed. The specific method is to keep the main vine when the main vine is about 50 cm long and remove all side vines. Single vine pruning has few leaves, few female flowers, small selection of fruit set, small fruit shape, usually used in early cultivation in the northern region with short growing period, single vine pruning, usually smaller fruit, fruit setting rate is not high , but mature earlier, suitable for early ripening and dense planting. The advantage is that it can be planted at a high density, the utilization of fertilizer and water is more economical, and the weight of watermelon is a high percentage of the total plant weight; the disadvantage is that it is laborious, the plant has more wounds, it is susceptible to disease, and it is easy to form empty vines.
2, double vine pruning
In addition to the main vine, one side vine was selected to remain parallel to the main vine at the base, and all side vines were removed afterwards. The double-vine vines have more vines, larger leaf area and more female flowers. The main side vines can set fruit and the fruit shape is larger. Precocious cultivation in the South and North is widely used. When the plant spacing is small and the row spacing is relatively large, the main and lateral vines can grow in the opposite direction. If the plant spacing is large and the row spacing is small, it is appropriate to grow the double vines in the same direction. The use of double vine pruning, the number of leaves is larger, the leaf area is larger, the female flowers are more, the main vines are able to set fruit, the fruit shape is larger
3, three vine pruning
That is, in addition to retaining the main vines, two lateral vines with robust growth and similar growth potential should be selected in the stem of the main vine, and other side vines should be removed. Three-vine pruning can be divided into three types of old vines, two-sided pull and other forms. The third old man was selected to leave two robust lateral vines at the base of the plant, extending in the same direction as the main vine; both sides of the vines were the two side vines extending in opposite directions from the main vine.
The advantage of Sanman pruning is that: the management is relatively labor-saving, and the plants have less wounds. Once the main vine is injured or unable to sit, it can be selected to stay next to the vine; if the density is appropriate, the effective leaf area is large, the same variety, and three. The vines have more weight and higher yields than single vines and double vine twigs or single guarantons. There are many leaves, large leaf areas, and more female flowers.
The disadvantage is that it should not be planted at high density, and the melons will mature later. Sanman pruning is a commonly used pruning method in open cultivation and late maturing varieties.
4, multi-vine pruning
When the main vines are 5-6 leaves, the main vines are topped. After the side branches are formed, 4-5 side vines are selected to remain, and the vines are grown in parallel or on both sides. The branches of the law are close to each other, female flowers appear to have a node, the flowering period is closer, and 3-4 melons can be formed at the same time. This method is applied when growing strong varieties and sparse plants. There is also the last kind of laziness that is allowed to grow during the growth period. Without pruning, labor can be saved. Generally, it is used in varieties that are weak and easy to set fruit. In the cultivation should still control the fertilizer and promote fruit setting.
Pruning should be based on the strength of the cultivars, growth potential, planting density, soil fertility and other specific circumstances; pruning should be timely, split; after fruiting is no longer pruning; to prevent the spread of disease during the operation.
Finally, the watermelon vines, watermelon pressure vines can prevent wind blew the damaged vines, and beneficial to sit melon and induce the growth of adventitious roots, make full use of the nutrients in the idyllic soil, thus increasing production. The method used to press the vines is that each 30-40 cm (4-5 knots) melon vines pressure once. When pressure is applied, the vine must be pressed and arranged evenly. When encountering female flowers, leave 1-2 leaves before and after the female flowers to make it easier to set aside. When the fruit begins to enlarge, stop squeezing. In the whole growth period, it is usually crushed 4-5 times. The vines should be held after noon. Because of the high moisture in the morning, the vines are brittle and the vines are easily broken.
The main and side vines are easily broken when pressed. When the vines are pressed, both the main and side vines need to be pressed, and the vines are tightened to facilitate the smooth transportation of nutrients. Pay special attention to the weight before melons and light pressure after melons. If the plant growth is more prosperous, in order to prevent leggy, it can be pressed and pressed deeper; and for the growth of thin plants can be light pressure and shallow pressure; soil water content is large, can be used to plug the vine way to fix the stem.
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