The main reasons for the emergence of shoots and stiff seedlings in tomato cultivation in greenhouses are insufficient light, excessive temperature and excessive moisture. There are more hazards after the seedlings grow in length or with stiff seedlings. Appetite buds differentiated lately, had more flowers, and had a low survival rate, which would significantly reduce production, but could not achieve early maturation.
Measures to prevent leggy seedlings are mainly to enhance light and reduce temperature, and to properly control moisture. When the seedlings grow densely, the seedlings should be divided in time, and the spacing of the seedlings can be expanded at the later stage of breeding to prevent overshadowing. In cold and cold weather, the cover must be properly opened to allow the seedlings to see the light. When the outside temperature is suitable, the cover must be completely removed to allow the seedlings to fully receive the light. For temperature conditions, the temperature required for each stage of the seedlings must be strictly managed, and ventilation should be conducted in a timely manner.
When the growth and development of seedlings are inhibited, they often appear to be seedlings. The characteristics of the stiff seedlings are: Dwarfling, straight stems, small leaves, and not easy to develop new roots. Flower bud differentiation is not easy to drop flowers and fruit, slow seedlings after planting. Seedlings in the cold bed often appear rigid seedlings, mainly due to the long seedlings, seedlings long-term low temperature, drought conditions.
Measures to prevent rigidification of seedlings: First of all, it is necessary to change the control of seedlings to promote seedling growth, and to give seedlings suitable temperature and moisture conditions to promote the rapid growth of seedlings. Practice has proved that the use of industrialized seedlings, electric hotbed nursery and other control measures to raise seedlings, there are few rigid seedlings. Followed by the use of cold bed nursery, as far as possible to improve the temperature and low temperature of the seedbed and appropriate watering, not excessive control of fertilizer control of water; for the emergence of the phenomenon of rigid seedlings, can be taken to improve the bed temperature, appropriate watering and other measures.
Coarse grain usually refers to rice, wheat, corn, soybean and potato five crops other than the grain and bean crops. The main are: sorghum, millet, buckwheat (sweet buckwheat, buckwheat), oats (naked oats), barley, millet, barley millet, barley millet, grain amaranth and beans (kidney beans), mung beans, adzuki beans (adzuki beans, adzuki beans), broad beans, peas, cowpea, lentils (soldier beans), black beans and so on. It is characterized by short growing period, small planting area, special planting area, low yield, and generally contain rich nutrients. The ancient Chinese medicine book "Huangdi Neijing" records that "five grains are for raising, five fruits are for helping, five livestock are for benefiting, and five vegetables are for filling". Some trace elements, such as iron, magnesium, zinc and selenium, are more abundant in coarse grains than in refined grains. The value of these trace elements to human health is considerable. Coarse grains are also richer in potassium, calcium, vitamin E, folic acid and bioflavonoids than refined grains.
Whole Grains are rich in nutrients. Oats, for example, are rich in protein; Millet is rich in tryptophan and carotene. Beans are high in quality protein; Sorghum is rich in fatty acids and iron; Tubers contain carotene and vitamin C. In addition, coarse grain still has the effect of reducing weight. Such as corn also contains a lot of magnesium, magnesium can strengthen intestinal wall peristalsis, promote the excretion of body waste, is very beneficial to weight loss.
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