What's the reason why squash the melon
1, zucchini melon internal cause
Zucchini produce melon phenomenon of internal cause is largely due to squash in flowering for various reasons lead to bad or pollination, hampering growth hormone synthesis in the ovary, makes the embryo and endosperm cannot normal growth and development, the period of vegetative growth and reproductive growth there is competition.Most nutrients for the growth of branches and leaves and cannot supply the fruits of development, leading to the ovary decreased growth hormone, plants cannot guarantee that the normal strong and melon.
2, zucchini melon external cause
2.1, variety Because there is a certain physiological differences between different varieties, different requirement to the water, so the rate of melon is different also, practice has proved that the thermo photoperiod sensitivity is not high, has the certain parthenocarpy ability, seedling endogenous hormones produce more varieties, melon phenomenon is relatively less.
2.2, temperature, temperature also is one of the main factors that lead to squash, melons, temperature is too high, can make the zucchini plants photosynthesis is affected, at the same time enhance the respiration, crops vegetative growth is greater than the reproductive growth, photosynthetic products mainly to leaf, stem lead to moderate growth of the plant, which cause the growth of malnutrition and melon fruit.If the temperature is too low, plant root absorption capacity is reduced, photosynthesis is abate, cause crop reproductive growth caused by a lack of nutrition supply and melon.
2.3, light illumination is one of the most important factors for plant growth, the accumulation of photosynthetic products directly affect the crops, if zucchini into after flowering, a continuous cloudy or rainy season such as bad weather, lead to crops need to grow light enough and small temperature difference between day and night, at this time to reduce photosynthesis of plant and makes the crop nutrient consumption in the process of growth and development is greater than the cumulative, eventually leading to malnutrition caused by the melon fruit.
2.4, planting density planting density can also affect the size of the squash the growth and development of the fruit, if planting density is too large, will lead to different plant roots and soil nutrient competition, and aboveground stem leaf due to the large density, pervious to light permeability is lower, the photosynthetic efficiency is not high, thus increasing the plant nutrient consumption.The rate of increase.
When the concentration of CO2 in the air around 2.5, CO2 too high or too low, will affect the zucchini plants photosynthesis.Make the photosynthetic product synthesis have been hampered, lead to dysplasia of female flowers, causing the melon.
2.6, SO2 SO2 under water in the air after generating sulfurous acid, can damage of chloroplasts in plants and affect the photosynthesis, so that the plant growth is destroyed, experiments show that when the content of SO2 in the air around 0.2 mg/L, after 3 ~ 4 days zucchini will generate the melon, when the concentration reaches 1 mg/L, after 4 ~ hours zucchini will melon.
2.7, NH3 zucchini cultivation in the process of the main source of NH3 decomposition of organic fertilizer and high temperature gasification of ammoniacal nitrogen, etc.Ammonia is only absorbed by the soil moisture can become liquid ammonia and absorbed by crops and effective use of, but encountered after high temperature, ammonia volatilization from escaping into the air, when the content reaches a certain extent, to squash the certain harm, produce the melon.
Squash the melon
1, select varieties of squash
Zucchini, due to the different varieties of the melon there exists a corresponding number and extent of the difference, therefore, can choose a few hardy on production with parthenocarpy ability stronger varieties of squash, is one of the most effective way to prevent squash, melons, such as the United States jade, turquoise, green jade crown, early spring generation and other varieties.
2, maintain appropriate temperature and humidity
Zucchini blossom period optimum temperature is 22 ℃ to 25 ℃, generally keep the canopy temperature of 25 ℃ ~ 30 ℃ during the day, more than 30 ℃ circulating cooling when appropriate.Keep 15 ℃ ~ 20 ℃ at night.When the cold winds, the temperature is too low to cover films and the compaction compaction.If the high humidity inside the greenhouse can appropriately lookout, at the same time reduce the irrigation frequency before knot melon.When to squash into the knot melon stage, the demand for water plant gradually increase, at this time had better use furrow or underground drip irrigation mode, can effectively reduce the water content of soil.
3, the use of plant growth hormone
