Watermelon is a highly efficient and economical crop, but in the process of planting, it is often the case that only flowering does not take fruit. Therefore, mastering the method of increasing the fruit setting rate has a certain positive effect on the yield increase of watermelon.
Generally speaking, the reasons for affecting the fruit setting rate of watermelon are as follows: ( 1 ), variety selection, some watermelon varieties are easy to grow too nutritiously, and the production of juvenile nutrients is not enough when the fruit is produced. ( 2 ), bad weather causes "smelling melon", even when it is cloudy, it is easy to make pollination, fertilization blocked, easy to "melon"; In addition, if the continuous low temperature will also reduce the fruit set rate due to the reduced vitality of pollen. ( 3 ), improper use of fertilizer, partial application of nitrogen fertilizer, insufficient supply of phosphorus and potassium fertilizer, easy to cause female flower dysplasia, will also cause melon grow long, even if flowering pollination, female ovary will be thin and dry, late easy to fall; due to stem The leaves grow vigorously, consuming too much nutrients, causing the young melons to fall off due to physiological disorders. The lower the fruit set, the heavier the empty vines.
To improve the fruit setting rate of watermelon, it must be considered comprehensively in terms of variety selection, water and fertilizer management. Generally, the following methods are generally used: ( 1 ), selecting varieties with strong fruit set, in general, selecting plants Medium growth, strong fruit set, and varieties that are not sensitive to temperature, light, and fertilizer can significantly increase the fruit set rate. ( 2 ), rational fertilization, the basic fertilizer should be based on organic fertilizer, increase the application of phosphorus, potassium fertilizer, control the amount of nitrogen fertilizer, can prevent premature vegetative growth, but also help the formation of reproductive organs. ( 3 ), reasonable adjustment of fruit position, generally choose the second or third female flowers to retain fruit, after leaving the fruit, leaving 5-7 leaves, picking the heart in time. ( 4 ), reasonable irrigation and drainage, in general, watermelon can not be watered during flowering, prevent fruit drop, can increase the supply of fertilizer and water after fruit setting ( 5 ), timely artificially assisted pollination, the activity of pollen determines the rate of watermelon sitting critical, watermelon after flowering, under sunny conditions, pollen viability of sustainable about three hours, in general, in fine weather, around 8 o'clock in the morning to start pollination, try to grant complete powder before 11:00; in addition, you can Use hormones to increase the fruit setting rate of watermelon.
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