Strawberry fruit problems, zombie fruit, deformed fruit, and a hollow fruit, the appearance is normal, but the hollow problem occurs between the pulp gum inside, it is really all caused by the bulking agent, Xiaobian said not necessarily.
First, the cause of hollowness
1. Varieties
Strawberries produce hollow problems are largely related to the variety, fruitful, sweet Charlie, Camerosa, Anna, Dukla, Lucy, etc. itself has the characteristics of hollowing in the middle of the fruit; their flesh density is small, the middle of the fruit is looser, it may form a small cavity, it is easy to hollow; like the more ripe the sweet Charlie strawberry, the larger the hollow in the middle, so it is necessary to harvest in a timely manner.
2. Uneven fertilizer and water
(1) During the flowering and fruiting period, the excessive application of nitrogen fertilizer is not only the leaf greedy for greenery, the competition for too much nutrients in the fruit, resulting in insufficient nutrition of the fruit, slow expansion and easy to appear hollow problems; and the leaves are too hypertrophied, reducing the light energy utilization rate of the crop population, respiration is strong, will increase the consumption of photosynthetic products, reduce the accumulation of dry matter, resulting in reduced strawberry yield;
(2) Boron calcium in the fruit setting period is insufficient; boron element plays an important role in promoting the transportation of nutrients inside the fruit, if the lack of boron and the pulp part of the nutrient is insufficient, it is easy to form hollow fruit, and the inside is white dry; the two elements of boron calcium are synergistic, calcium deficiency affects root growth, and fertilizer absorption and utilization rate will also decline.
3. Temperature and humidity
(1) In the process of cultivation, in the rainy weather, insufficient light, photosynthetic products are reduced, and the nutrients supplied internally by the fruit are insufficient, and it is easy to produce hollow fruits;
(2) During flowering and fruit setting, if the shed temperature is too high or too low, resulting in poor pollen fertilization, the cell division of the pulp tissue in fruit development is accelerated, and the seed will also form a hollow fruit due to poor fertilization and fruit growth rate.
For example, the temperature in the greenhouse is low in winter, the fruit grows slowly, the temperature rises quickly after the spring, the fruit grows rapidly, and the moisture is sufficient to cause the hollow fruit; the fruit is not picked in time to cause the fruit to over-ripen, and the increase in nutrient consumption will also increase the hollow rate of the strawberry.
There is also the problem of the expansion agent that everyone is concerned about, the amount of expansion agent is too large, resulting in the rapid growth of the outer cells of the fruit, the center can not keep up, and the result is empty; but it is not the main factor.
2. Preventive measures
1, water and fertilizer is reasonable
(1) In the flowering stage, young fruit stage, expansion period should continue to supplement boron element, it is recommended to apply a micro-supplement three-stage rocket water-soluble fertilizer, rapid supplementation of fast-acting organic matter, supplement key phosphorus, potassium, calcium, magnesium, zinc and boron elements; with foliar spraying of micro-supplement boron + brassicalide, promote flowering and fruit.
(2) Strawberry root distribution is shallow, large transpiration, strict water requirements, autumn is the plant accumulation of nutrients and flower bud formation period, soil moisture should not be less than 60%; but strawberries are not tolerant to waterlogging, requiring good soil permeability, so pay attention to field rainy season drainage.
2. Do a good job in shed management
(1) Keep the light in the shed sufficient, you can consider laying a reflective film or using incandescent lamps to fill the light during rainy weather; and pay attention to the cleaning of the shed film;
(2) Keep the temperature in the shed reasonable, timely ventilation to reduce the temperature, especially during the flowering and expansion periods.
Of course, farmers should also grasp the amount and frequency of bulking agents, and moderate them. If you have other opinions on strawberry hollow fruit, welcome to leave a message below.