Where is the suitable part of the watermelon?

The suitable part of watermelon is related to the size of the fruit shape, which has been well known to the majority of melon farmers. In addition, the fruit setting node position can be used as an important marker to measure the relationship between vegetative growth and reproductive growth of plants. Tests have shown that

The optimal fruit-setting node is 15 to 16 knots. The fruit setting node is too high, indicating that the vegetative growth is too vigorous and the nutrients are consumed needlessly. However, the fruit setting node position is too low, and the vegetative growth is poor, which affects the expansion of the fruit.

1) The relationship between plant growth potential and fruit set.

When the growth potential and fruit setting ability are strong, the application of nitrogen fertilizer should be controlled before fruit set, the main vines and twisted branches with vigorous growth should be removed, and 3 5 leaves should be topped before the fruit setting node to inhibit plant potential, and fruit setting should be promoted through artificial assisted pollination. Once the fruit is set, the contradiction of "crazy seedlings" is solved because the growth center of the plant turns to the fruit. When there is a "falling seedling", the young fruit at the base should be removed as soon as possible, nitrogen fertilizer should be added to promote vegetative growth, and the fruit should be promoted when there is a certain amount of leaves.

Experienced melon farmers often use the different conditions of the growth of the top of the stem and vine to identify the strength of the growth potential of the plant, and the tip of the stem and vine with strong growth potential stands upright regardless of early morning or noon. The tips of medium-growing stems and vines only rise in the early morning, and in the strong light and high temperature at noon, they stretch flat or downward. The tips of weakly growing stems do not go up or down at noon or early morning.

2) The relationship between leaf area and fruit growth.

Leaf size, quality, and maintenance time play a decisive role in the size of watermelon fruits. The experiment showed that plant 1 at the fruit-setting stage had about 30 functional leaves, with a leaf area of 2000 3000 square centimeters per plant, and more than 40 functional leaves with a leaf area of 5000 7000 square centimeters at the peak fruiting stage, which could produce fruits weighing about 5 kg.

The number of leaves per plant is large, the leaf area is large, the weight of a single fruit increases, and the sugar content increases. The leaf area index was low at 30 40 cm near the ground, and the leaf area index was lower when the leaf area reached the maximum in the peak period, and the leaf area index in the field was suitable under the condition of a certain number of plants. Therefore, it should be properly densely planted, pruned reasonably, reduce the number of leaves per plant, increase the leaf shape, and improve the quality of leaves.

Ensuring a certain leaf area and a reasonable leaf area index is the key to increase fruit shape and increase yield.

Watermelon vines are luxuriant, and if they are allowed to grow, the melon vines overlap each other, which will not only affect the dense planting, but also delay the fruiting. Watermelon pruning methods generally include single vine, double vine and triple vine. Single-vine pruning, leaving only one vine per plant.

The rest of the side vines were all removed, the method was simple, the number of plants per unit area was more, and there were more melons, but there were fewer leaves per plant, the fruit was not easy to grow, and the yield and quality were low. In addition to the main vine, when the main vine grows to more than 30 cm, the double vine pruning is to leave a strong side vine at the base, and the three vines leave two strong side vines as secondary vines or reserve vines, and the rest of the side vines are removed; In production, double vine pruning is mostly used. When pruning watermelon, attention should be paid to the first is timely pruning.

Generally, when the main vine is 40 50 cm long and the side vine is about 15 cm, it starts and then every 3 5 days; Second, no matter which pruning method is adopted, it is required to be carried out carefully before fruit setting, and generally no pruning is done after fruit setting, so that there are more branches and leaves to provide nutrients for fruit growth. When the fruit begins to expand rapidly, topping can be performed to prevent excessive vegetative growth.

When the vine is 30 cm long, the whole vine should be carried out to make it evenly distributed, and the vine should be pressed with soil blocks on the knots to promote the production of adventitious roots, fix the leaf vines, prevent mutual shading and wind blowing off the roots and damage the leaves, and then press every 5 6 knots until the vine leaves are full of furrows. There are two types of vine pressing methods: open pressure and dark pressure. In rainy areas, the soil moisture is high, in order to prevent rotten vines, it is not necessary to bury all the melon vines in the soil, only press the soil blocks on the node, and the ground is still exposed between the nodes, which is called "open pressure".

In order to promote the occurrence of adventitious roots in arid areas with little rainfall, all melon vines should be buried in the soil called "dark pressure". In order to prevent the brittle melon vines from breaking, pruning and pressing the vines should be carried out in the afternoon. Regardless of the method of pressing, it should be determined according to the growth of the plant.

Heavy pressure and frequent pressure should be taken for those with strong growth, and light pressure and less pressure for weak growth. Generally, it is pressed once every 5-6 knots, and two places are pressed before and after the melon. Leave 2-3 leaves before and after the female flowers of the melon without pressure to prevent the melon from rotting with water or being restrained when the melon grows up.

Watermelon is made up of the peel and pulp of the fruit. The peel is the green coat wrapped around the red melon pulp, also called watermelon peel.

The part that is usually eaten is called the flesh of the watermelon, and the part that is eaten and spit out is called the seed of the watermelon.

Watermelon: Watermelon is an annual vine; The stems and branches are stout and have distinct ridges. tendrils stout, pubescent, petioles thick, pubescent; The leaves are papery, triangular in outline, with whitish-green bouts, with two masks with short stiff hairs, and the base of the leaves is heart-shaped.

Monoecious. Both the female and the male are born in the leaf axils. Male pedicels 3-4 cm long, densely pubescent with yellowish-brown flowers; calyx tube broadly bell-shaped; corolla pale yellow; The stamens are nearly detached, the filaments are short, and the chamber is curved.

Female flowers: calyx and corolla identical to male flowers; The ovary is ovate, stigma kidney-shaped. The fruit is large, nearly spherical or oval, fleshy, juicy, smooth skin, and varied in color and ornamentation.

The seeds are numerous, ovate, black, red, smooth on both sides, obtuse at the base, usually slightly arched at the edges, flowering and fruiting in summer.

<> The internal structure of watermelon seeds includes seed coat and cotyledons and endosperm. Watermelon: a fruit in summer, the flesh is sweet, and it can cool down and remove the heat; The seeds contain oil and can be used as recreational food; The peel is medicinal, and has the effect of clearing heat, diuresis and lowering blood pressure.

The seeds are numerous, ovate, black, red, smooth on both sides, obtuse at the base, usually slightly arched at the edges, and the flowering and fruiting period is summer.

Watermelon is made up of the peel and pulp of the fruit. The peel is the green coat wrapped around the red melon pulp, also called the watermelon skin, and the part that is usually eaten is called the flesh of the watermelon, and the part that is eaten and spit out is called the seed of the watermelon.

The growth habit of watermelon is not cold tolerant.

Watermelon likes a warm, dry climate, watermelon is not cold-tolerant, and the temperature is better for watermelon growth and development when it is 24-30; Watermelon is drought tolerant but not humidity tolerant, and when there are more cloudy and rainy days, watermelon is more susceptible to disease; Watermelons like light and have a long growth period; As the plant grows, the demand for fertilizer will gradually increase. Watermelon is relatively adaptable and is better planted in weakly acidic soil (pH 5-7).

How to grow watermelon:

1. The planting site watermelon has strong adaptability and likes loose, deep and well-drained soil, so when choosing the land for planting, it is necessary to choose a place with fertile soil, good drainage and irrigation, and high terrain, and the soil is best sandy soil, which is the most suitable land. Before planting, it is necessary to clean the weeds and apply base fertilizer to lay good conditions for the planting of watermelons.

2. Cultivating seeds Before planting watermelons, it is best to do local market research and choose some watermelon seeds that are in line with the local market. After the seeds are bought, soak them in warm water for 12-18 hours, wash them and put them in a wet towel, and the temperature is controlled above 20 degrees Celsius, which can promote the germination of the seeds, and the seeds can be sown after germination.

3. Seedlings will be sown with germinated seeds, and it is necessary to use a well-built arch shed to protect the seeds that break through the soil. When the seedlings grow, it is necessary to reduce ventilation and proper watering, which can promote the growth of the seedlings and develop faster.

4. When the seedlings grow to 10-15 cm, they can be planted, they need to be punched in the field when planting, and then the seedlings are planted in the field, and the soil will be covered after the end, and then a small amount of water will be poured to ensure the healthy growth of watermelon seedlings.

5. At this point, it is necessary to remove the main whiskers on the watermelon vines, and then remove the watermelons that are too small and problematic to ensure that the remaining watermelons have more growth space and watermelons can be planted better.