After 18 to 20 days after the vine extends, the fruit will enter the result period. In the fruiting period, the watermelon will undergo morphological changes such as depilation. According to these morphological changes, the result period can be divided into three stages: the early stage of the result, the middle stage of the result, and the later stage of the result.
The result, also known as the fruit setting stage, is an important step in watermelon cultivation. At this time, the conflict between Nagase and the establishment of fruit is very prominent. If there is too much precipitation at this time, the amount of watering is too large, and nitrogen fertilizer is applied excessively, it can easily cause the plants to grow crazy and lead to a large number of falling flowers and falling fruit. Therefore, the results of the previous management should be to promote fruitfulness, strict control of irrigation, timely pruning, hiccups and vines, and to take artificial pollination or hormone treatment measures to promote fruit set, improve the rate of results.
Results The diameter and volume of watermelon fruit increased rapidly during the middle period, and the demand for water, fertilizer and nutrients was the largest. If the supply of fertilizer and water is insufficient at this time, not only the fruit can not fully inflate, but it is also prone to premature aging and dehydration.
From the time the watermelon grows to the size of the egg or goose egg, pour a swollen water of the water and chase the swollen fertilizer. Before and after the fruit is fixed, it can be sprayed with 0.2% urea or 0.2% potassium dihydrogen phosphate to prevent premature aging of the leaves.
The specific management technical measures are as follows:
Cultivate fertilize the fields and fertilize the soil. It is required to do fat footing and chase fat. The method is to apply topdressing fertilizers in dry days and chase fertilizers in rainy days. Use a wooden rod with a diameter of 5 cm to make up the fertilizer at about 20 cm from the root of the seedlings. Apply the fertilizer for the first time at the planting stage (5 leaf period), and recover 10 kg of diammonium for the mu; the second time the fertilizer is applied 7 days after the flowering. 15 kg of urea and 15 kg of potash were followed; the third topdressing was carried out 7 days after the second topdressing, with 10 kg of urea and 10 kg of potash.
Watered watermelons are resistant to drought, but they also need to be watered in a timely manner. Press water. During the period when the watermelon enters the group, combined with the first top-dressing watering, the amount of water should be moderate, and only the sowing ridge can be poured. Swelling water. In order to promote fruit enlargement and prevent shortage of water, the second time should be combined with swelled melon water. The amount of water should be increased appropriately, water can be poured, then watered according to soil and precipitation, so that a balanced water supply can be provided to prevent cracking. Especially after severe drought, attention should be paid to controlling watering.
Pressure vines, pruning, fruit thinning, selection of melons, and melon vines are usually the first time when the main vine is 40 to 50 cm, the second is about 100 cm, and the third is 150 cm. There are pressure and dark pressure in two ways. The pressure is to use guava with clods, branches and other objects on the ground, the dark pressure is to dig a deep groove in the ground, put the melon vine inside, leaving only the leaves, and then compacted with soil. The dry slopes in the mountainous areas should be darkly pressed, and the areas with large rainfall should be fine pressure. It is best to use triple vine pruning, that is, to leave one main vine and two robust lateral vines from the base of the root, and cut off all the other side branches. The main mango leaves between 10 and 18 knots, leaving one melon per plant. You can stop pruning.
For weeding in melon fields, we should try to keep the ploughs in motion or move the plough with little rakes. There are no empty ridges sown or planted in the fields, do not move when doing ridges, and wait until the weeds grow to the weeds in front of the ridges. When ploughing the grass, deepen the soil.
Artificial pollination during the flowering period, in case of rainy season, we must wear rain-proof hats for the female flowers in the field one afternoon before the opening of the female flower, and pick the male flowers in the field at 5 o'clock in the next morning (the male flowers of pollination varieties that will be opened on the day). In a cool, rainy place, wait until the flowering loose powder (6 to 7 o'clock) and gently apply the stamen pollen to the stigma of the female flower in the field. A male flower can grant 1 to 3 female flowers. The pollination time should be finished before 10 o'clock in the morning. If the time is too long and the stigma and pollen age, the fruit setting rate will not increase. After pollination, wear rain-proof paper caps for female flowers.
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