Greenhouses vegetable management of a few why? Extension of light duration

Spring temperature swings, greenhouse vegetables are also easy to appear a variety of problems, need to take a variety of measures in advance to prevent and deal with these can reduce the yield and quality of vegetables or serious production reduction problems. So, what are the reasons and principles for these measures?

1. Why do you want to keep the light as long as possible?

As the saying goes, everything grows by the sun. Light is the driving force of photosynthesis in crops. Without light, crops can't photosynthesize. Without photosynthesis, crops can't grow. In theory, the longer the light duration, the more efficient the photosynthesis, the more organic products the crop will produce, i.e. the higher the yield and quality. In the northern winter, the light time is short, so we should try to extend the light time in the greenhouse. As soon as the sun rises, pull off the quilt or straw mat and cover it again after sunset. Of course, considering the problem of temperature, it can be flexibly controlled in time.

2, why greenhouse vegetables to change temperature management?

As we all know, the temperature and change, all the time will affect the survival, growth and development of organisms. The same is true of plants. Temperature affects various processes of physiological metabolism in plants, such as respiration, decomposition, photosynthetic synthesis, absorption and transport of water and nutrients, transformation and accumulation of substances and so on.

In turn, these physiological metabolic intensity can also be affected by other factors. In a day, in the morning, morning, noon, evening and night, etc., different periods, because of the comprehensive influence of light, temperature and other factors, the physiological metabolism of plants is also different.

The purpose of agricultural production is to make good use of these laws in a more scientific way, so that crops can produce more and better quality agricultural products. Shed cultivation of vegetables is a mode of agricultural production to achieve this purpose. Variable temperature management, can purposefully adjust the growth of vegetables, in order to better achieve our production purposes.

3. Why do you want to see the seedlings watered?

Although plants can not do without water, but in the growth process of plants, the demand for water sometimes more and sometimes less, there is a certain regularity. In the process of vegetable management, measures should be taken around the law of the plant, rather than just relying on the subjective will to water.

In general, on the basis of enough soil moisture, vegetable seedling and growth period, less water demand, in the bearing period of water demand.