Zucchini melon is a more common problem in production. The melon is the 3-4 days after the opening of the female flower of the zucchini. The front part of the young fruit is greenish and yellow, soft and soft, the fruit is not swollen or swollen, the surface is tarnished, the apex shrinks, and the commercial melon cannot be formed. Or shedding phenomenon. At present, zucchini and melon have become one of the obstacles to production. The causes and preventive measures are as follows.
First, the reasons for melon melons are mainly caused by environmental conditions or nutrient supply imbalance. The specific reasons are as follows:
1. temperature. The temperature is too high, more than 35'12 in the daytime, and higher than 20~C in the nighttime, resulting in lower photosynthesis, enhanced respiration, and a large amount of carbohydrates transported to the stems and leaves. The vines are long and malnourished. The temperature is too low, the day is lower than 20~C, and the night is lower than IO~C. The root absorption capacity is weakened, the photosynthesis is also reduced, causing nutrient starvation and causing the melon.
2. illumination. Zucchini enters the flowering stage. At this time, if there is continuous cloudy or cloudy rain, the temperature difference between day and night is small, and the photosynthesis is affected. The consumption of nutrients is more than that of manufacturing, which will cause malnutrition and melon.
3. Planting density. The density is also one of the factors affecting the melon, the density is large, the roots compete for nutrients in the soil, while the stems and leaves in the upper part compete for space. When the leaf area index reaches 4 or more, the light transmission and permeability are reduced, and the photosynthetic efficiency is reduced. Not high, the consumption is increased, and the rate of melon is increased.
4. pollination. Due to poor pollination or no pollination, auxin cannot be produced in the ovary, resulting in the inability of the embryo and endosperm to grow normally, combined with vegetative growth and competing nutrients. When the supply of nutrients to female flowers is insufficient, the auxin content of the ovary is reduced. Can not be solid and melon.
Second, preventive measures Adjust the temperature. Keep it at 25-30~C during the day, more than 30~C, and should be properly ventilated. Keep at 15-20~C at night, the temperature is too low, can be warmed by the stove.
2. Supplemental lighting. In the case of maintaining the temperature inside the shed, it is necessary to pull the grass shovel early, and if there is continuous cloudy or rainy weather, the illumination can be enhanced by using a light lamp or a reflective film.
3. Determine the appropriate density. The planting density should be controlled at 2000-2500 plants/667 square meters. When planting with large and small spacing, the line spacing is 80 cm, the small row spacing is 60 cm, and the plant spacing is 40 cm.
4. Hormone treatment. 2-3 days after the flowering of zucchini, sneezing with 100 mg / kg gibberellin or 100 mg / kg of anti-falling granules can make the melon grow faster and not easy to turn the melon.
First, the reasons for melon melons are mainly caused by environmental conditions or nutrient supply imbalance. The specific reasons are as follows:
1. temperature. The temperature is too high, more than 35'12 in the daytime, and higher than 20~C in the nighttime, resulting in lower photosynthesis, enhanced respiration, and a large amount of carbohydrates transported to the stems and leaves. The vines are long and malnourished. The temperature is too low, the day is lower than 20~C, and the night is lower than IO~C. The root absorption capacity is weakened, the photosynthesis is also reduced, causing nutrient starvation and causing the melon.
2. illumination. Zucchini enters the flowering stage. At this time, if there is continuous cloudy or cloudy rain, the temperature difference between day and night is small, and the photosynthesis is affected. The consumption of nutrients is more than that of manufacturing, which will cause malnutrition and melon.
3. Planting density. The density is also one of the factors affecting the melon, the density is large, the roots compete for nutrients in the soil, while the stems and leaves in the upper part compete for space. When the leaf area index reaches 4 or more, the light transmission and permeability are reduced, and the photosynthetic efficiency is reduced. Not high, the consumption is increased, and the rate of melon is increased.
4. pollination. Due to poor pollination or no pollination, auxin cannot be produced in the ovary, resulting in the inability of the embryo and endosperm to grow normally, combined with vegetative growth and competing nutrients. When the supply of nutrients to female flowers is insufficient, the auxin content of the ovary is reduced. Can not be solid and melon.
Second, preventive measures Adjust the temperature. Keep it at 25-30~C during the day, more than 30~C, and should be properly ventilated. Keep at 15-20~C at night, the temperature is too low, can be warmed by the stove.
2. Supplemental lighting. In the case of maintaining the temperature inside the shed, it is necessary to pull the grass shovel early, and if there is continuous cloudy or rainy weather, the illumination can be enhanced by using a light lamp or a reflective film.
3. Determine the appropriate density. The planting density should be controlled at 2000-2500 plants/667 square meters. When planting with large and small spacing, the line spacing is 80 cm, the small row spacing is 60 cm, and the plant spacing is 40 cm.
4. Hormone treatment. 2-3 days after the flowering of zucchini, sneezing with 100 mg / kg gibberellin or 100 mg / kg of anti-falling granules can make the melon grow faster and not easy to turn the melon.
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