Causes and prevention methods of empty watermelon seedlings

In the process of watermelon planting, there is often the phenomenon that some empty seedlings do not bear melons, and many fruit growers often mistake it for a variety problem, but it does not have much to do with varieties. So what is the cause of empty watermelon seedlings? Let's get to know it with the editor.

1. Adverse climate

When watermelon is a temperature-loving crop, the suitable temperature for growth is between 15 and 33 degrees. Growth will be inhibited when the temperature is lower than 15 degrees or higher than 40 degrees, resulting in poor development of female flowers and ovaries, resulting in fruit drop and melons, resulting in "empty seedlings" of watermelons. For example, low temperature, high temperature and drought, overcast and rain during flowering and strong light exposure will produce empty seedlings.

Prevention methods: in view of the empty seedlings caused by various adverse climates, targeted preventive measures need to be taken, low temperature at flowering stage can be artificially promoted by artificial pollination, and high temperature and drought can be irrigated with phosphate fertilizer and water to change air and soil moisture and promote pollen development. One spoon insemination During the flowering period, rainproof measures can be taken in advance according to the weather forecast, such as putting rain-proof paper caps on female flowers, or collecting blooming male flowers in advance for artificial pollination after rain; and strong light exposure can also cover young melons with weeds and stems collected during pruning to prevent sunburn.

2. Improper cultivation techniques.

Improper sowing will lead to empty seedlings. the later the sowing time is, the higher the node position of female flowers is, and the insufficient supply of nutrients and water will lead to falling flowers or melons and empty seedlings. The planting density is too high, and the peak period of vegetative growth is in the high temperature and rainy season, when the plants are closed in the field, poor permeability and lack of light, resulting in empty seedlings.

Prevention methods: sowing should be timely and early seedling cultivation, in order to cultivate strong seedlings, stagger the high temperature period of flower bud differentiation, reduce the node position of female flowers, and prevent empty seedlings. The cultivation density of watermelon should be determined according to the variety and soil fertility, so as to avoid low density and plant closure. Generally, mid-late maturity varieties plant 600,800 pigs per mu, while super-large watermelons plant 350,400 pigs per mu and early-maturing fruits plant 1000-1300 plants per mu.

3. Improper cultivation and management.

Improper management at seedling stage will cause weak growth of seedlings and cause empty seedlings; at the initial stage of vine extension, field management can not keep up with, resulting in excessive vegetative growth, decreased light transmittance and ventilation among plants, resulting in falling flowers and fruit, resulting in empty seedlings; pruning and pressing vines are unreasonable, vegetative growth can not normally turn to reproductive growth, affecting fruit setting rate, resulting in empty seedlings. Improper management of fertilizer and water, unreasonable ratio of nitrogen, phosphorus, potassium and trace elements. Insufficient or uncoordinated nutrients result in overgrowth of the plant, which used to be empty for you.

Prevention methods: at seedling stage, flower bud differentiation can be promoted by ploughing, fertilization and strong seedlings; vine extension can restrain vegetative growth through pruning and pressing vines, coordinate the contradiction between vegetative growth and reproductive growth, and improve fruit setting rate; it is necessary to strengthen fertilizer and water management and adopt reasonable formula fertilization to prevent excessive weight of nitrogen fertilizer and occurrence of crazy seedlings and running vines.

The above is the introduction of the causes and prevention methods of empty watermelon seedlings. I hope I can help you. If you want to know more about it, please follow us.