In winter, the climate is cold, the temperature is low, and frequent winds and high temperatures are used to cool down the weather. Therefore, the work of protecting the cold and heat and protecting the vegetables from low temperatures is the key to the management of vegetables in winter greenhouses. Small water pouring, under the film dark irrigation in winter not only low temperature, low ground temperature, excessive watering, the first result in decreased ground temperature, the second is caused by poor soil ventilation, a direct impact on root activity and absorption function. The adoption of submerged small-water irrigation can meet the water demand of vegetables without excessively lowering the ground temperature and affecting the ventilation of the soil. Therefore, it can effectively solve the conflict between soil water, gas and heat, and is beneficial to vegetables. Grow. If conditions permit, drip irrigation is better. The management of continuous-rainy weather encounters the continued yin, rain, and snow weather. It is also necessary to unveil the grass curtains every day to allow vegetables to receive scattered light to maintain the normal activity of chlorophyll. It is usually possible to let the vegetables receive scattered light for about 4 hours to 6 hours before and after noon. For vegetables that have already entered the fruiting period, it is important to pay attention to harvesting the fruits early and remove the remaining fruits. Improved indoor lighting conditions Natural light in winter is weaker, and the light in the greenhouse is often in deficit. Many ways to improve indoor lighting are important techniques for winter management. First of all, the reflective screen (ie, a kind of aluminum-plated plastic film) should be hung on the northern wall of the greenhouse. Its length and length of the greenhouse should be the same, and the height below the hanging height should be 20cm to 30cm from the ground. At the same time, it is necessary to eliminate dust and snow on the surface of the film as well as water droplets and water mist under the film to increase the light transmittance of the film.
For the most common waxy and sweet corn on the market, waxy corn has a higher nutrient content than regular corn, containing 70-75% starch (and almost all straight-chain starch), more than 10% protein, 4-5% fat and 2% multivitamins, with more grains, VA, VB1 and VB2 in protein than rice, with the highest fat and VB2 content. Yellow maize also contains carotenoids, such as rice and wheat. The molecular weight of waxy maize starch is more than 10 times smaller than that of ordinary maize, and the starch makes glutinous rice sticky and soft, softer than ordinary hard maize. It is more than 20% more digestible to eat than regular maize and it is suitable for people with less than perfect teeth. At the same time, it is not suitable for diabetics because of the very high content of straight-chain starch (a polysaccharide).
Waxy maize is also known as sticky maize. The grain has coarse, waxy endosperm, similar to shiny, glassy (clear) grains such as hard and dent maize. Its chemical and physical characteristics are controlled by a recessive gene, which is located on chromosome 9. 100% of the starch in the endosperm is straight-chain starch.
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