For the time being, the more common shades used in strawberry cultivation include the use of sunnets and the spraying of shades. The shade rate for sunnets can normally reach 23 - 82 per cent, with clear cooling and direct reduction of 5 - 12°c. In general, indoor hanging is prone to uneven room temperature distribution, high temperature and poor control in areas close to the roof, mostly by outdoor hanging to reduce heat and light. Spraying of shampoo materials outside the shampoo for long periods of time, free from weather, can also adjust concentrations to demand and control the photo mask rate, albeit at relatively high cost。
2. Drought and flood preparedness, scientific drainage and irrigation
Strawberries are intolerant to high temperatures and, in addition to providing shade protection, should be properly watered to keep the soil moist, reduce the temperature in the shed and the soil temperature by evaporate and improve the ambient conditions of high temperature and heat in the sheds, thereby enhancing the vitality of the roots. Under normal circumstances, water is chosen by 10 a. M. Or after 5 p. M。
It is important to note that, in recent years, our climate has been extremely volatile, and that floods in the north and south of the country have been frequent, and that, in addition to frequent shades of cooling, drought and flood control measures should be put in place. If there is a continuous high-temperature dry season, every three to five days in the evenings, the running water is poured into parallel ditches, the excess water is drained and the ditches are kept the same, so that the drainage is combined; if there is a continuous rainy season, it must be done in a timely manner to keep water in the ditch, to ensure that the seedlings are not rooted and that the rain drys。
How do you choose the sunnet
1. Selection of shades of different colours network
There are two types of sunnets, one of which is black, with a high photo masking rate and a good cooling effect, although the light co-operation of the plant has a greater impact. If strawberries are to be selected at the growth stage, the amount of time covered needs to be reduced appropriately. The other is silver gray, which has less shade than black, but has less light co-operation impact on crops, which can be chosen according to different needs。
2. Selection of shades of varying density network
The solar cover rate varies from needle density to needle density. The typical shade of the 3 needle-covered sunnet is around 50-60 per cent, which applies to the strawberry nursery period, with attention to the need to remove it at 3 p. M. So that it can receive appropriate light. The shade rate of the 4 needle-covered sunnet is around 70 per cent, usually used for strawberry seeding periods, which can be removed when strawberry seedlings are slow; and about 85 per cent of the 6 needle-covered sunnets, which are generally used for strawberry-coverage periods, i. E. 7-10 days before planting, when the use of the 6 needle-covered net is more conducive to reducing the evaporation of strawberry seedlings and increasing the rate of displacement to life. If the local light is too heavy, an eight-pile cover net, with a coverage rate of up to 95 per cent, can also be used。
Summary
If strawberries are available early, the two most critical elements are the cultivation of seedlings and the separation of buds. At this critical stage of strawberry seedlings, coupled with the gradual recovery of temperatures, we must actively undertake shade cooling measures, properly use shade-covered nets, spray shade-covered materials, water in due course, and discharge in a timely manner, and prepare ourselves for the onset of high temperatures and rainy seasons. Only then will our strawberries be safe in the summer and market early to achieve the best economics
