Plant spacing and row spacing of watermelon

Planting watermelon in greenhouse can be carried out according to the planting density of wide row spacing of about 90-100cm, narrow row spacing of about 40-50cm and plant spacing of about 40-50cm, while when planting watermelon in the open air, plant spacing and row spacing can be determined according to different ripening periods, generally plant spacing is controlled at about 40-50cm, row spacing is controlled at about 1.6m-2.2m, early-maturing varieties can be denser and late-maturing varieties can be slightly sparse.

Plant spacing and row spacing for planting watermelons

Planting watermelons in greenhouse: generally, watermelons can be planted in greenhouse according to wide and narrow rows, hanging seedlings and hedgerows, with wide row spacing of 90-100cm, narrow row spacing of 40-50cm and plant spacing of 40-50cm. The planting density can be increased to 1800-2400 plants per mu.

Open-air planting: the plant spacing and row spacing of open-air watermelons can be determined according to the different maturity periods of watermelons. In general, the plant spacing can be controlled at about 40-50cm, and the row spacing can be properly adjusted according to different varieties. Early-maturing varieties can be planted denser, while late-maturing varieties can be sparse.

II. Management in the later stage of planting watermelon

1. Wipe sprouts and leave vines

After watermelon planting, in order to increase the number of leaves in the early stage, do not wipe buds prematurely, and let them grow naturally, so as to increase the number of leaves as soon as possible and promote the growth of vines. When the vines grow to more than 60cm, they can be wiped and branched. Four large vines should be retained when sprouting, so that the vines can continue to grow, and the rest of the small vines will be cut off.

2. Arrange the hanging vines

Select two big mans from them, hang the vines with the melon line, and take the s-type to wrap the vines so that the vines bend upward to climb, which can ease the growth of the vines and improve the utilization rate of the space.

3. Pruning accessory vines

The main results are as follows: (1) for the two accessory vines growing between the axils of the vine leaves, except for one in the node position of the sitting melon, the 4 leaves of 3Mel are retained to pick the heart, and all the other accessory vines should be cut off to avoid too many growing points, resulting in insufficient nutrition, and will also affect the light conditions and reduce the fruit rate of watermelon.

(2) for the other two melon vines, one leaves 8-10 leaves to pick the heart, and then trim off the accessory vine twice, and the other vine should also be trimmed twice in time to let it grow freely on the ground between rows. When artificial pollination, it is also necessary to remove the growing point and accessory vine, so as to reduce the competition for nutrients, which is beneficial to watermelon sitting.

4. Keep the mature leaves

More mature leaves can be retained in the early growth stage of watermelon, so as to increase the number of leaf area in the early stage of watermelon, fully improve the utilization rate of space, produce organic nutrition, and promote the development of root system, strong seedling and melon. Lay a good foundation for high yield and high quality in the later stage.

5. Control the growth of melon seedlings during fruit setting period.

The main results are as follows: (1) when planting watermelons in open field, with the rapid expansion of young melons in the fruit-setting period, the growth of melon seedlings will begin to slow down until suspended, but in the greenhouse, because of high planting density and sufficient fertilizer and water, melon seedlings will continue to flourish, if allowed to grow, it will lead to canopy closure of melon seedlings, deterioration of light conditions, reduction of photosynthate, and prone to diseases and insect pests, resulting in a decline in watermelon yield.

(2) during the period, attention should be paid to the timely control of the growth of melon seedlings, and when the growth of melon seedlings is about 2 meters, the melon head should be removed and the branches should be cut off in time, so as to improve the light conditions, increase the photosynthetic efficiency, restrain the growth of melon seedlings and promote the supply of nutrients to young melons.