The cultivation of leeks in greenhouses is very common, and the variety of leeks is also very large. It is very important to choose the varieties of high-yield leeks. Today, I will share with you the principle of selecting varieties of leeks in greenhouses.
There are at least 100 Chinese amaranth varieties, including a variety of farmer varieties suitable for different needs, as well as high-yield and high-yield new varieties that are artificially cultivated. Amaranth is different from other, annual vegetables, which are perennial perennial vegetables, planted one. In the year, it can be harvested for 4-5 years. Therefore, in order to obtain high yield and stable yield, it is very important to choose the variety of amaranth on the road. The principle of selecting varieties in greenhouse cultivation is mainly the following:
(1) Suitable for local geographical location and climatic conditions China has a vast territory and large geographical and climatic differences. Northern cultivation should choose varieties with strong cold resistance, such as 791, Hansong, etc., and the southern and Huanghuai river basins should choose Xuzhou four seasons. Hanzhong Dongyu and so on.
(2) The wide leaf type should be selected for the production of green barley in combination with the cultivation method, and the heat-resistant narrow leaf type should be selected for the cultivation of alfalfa.
(3) Satisfying the market demand At present, the market is more favored for large leaves with thick leaves, soft and fresh, and strong aroma. The price is also high. When selecting varieties, we should pay attention to this trend to obtain high yield and high efficiency.
Grinding Glass Microsphere
1. To select glass beads in types, sizes and quantity in accordance with viscosity, rigidity and dispersal of the grinded materials.
2. To clean glass beads and mill's inside before the grinding processed.
3. To input the grinded materials firstly and a curtain amount of glass beads later. To add continuously glass beads till 70%~80% of the mill is full.
4. To forbid to keep glass beads funning with little grinded material for a long time, as the glass beads inside the mill are easily broken at high speed operation.
5. To add new glass beads to ensure the quality and efficiency of grinded materials.
Grinding Glass Beads are mainly used for the disperser, grinding media of industries, such as coloring, paint, ink, coatings, resins, chemical engineering, with the advantages of smooth surface, even size, high hardness, good chemical stability. Thanks to the characteristics of heat-resistant, wearable, compression strength, the filling-type bead could be used to improve glass fibre reinforced plastic, rubber, and so on.
The glass bead can be produced based on the standard of countries or areas, such as EN1423/1424, AASHTO M247, BS6088, JIS R3301 and KS L2521 etc.
Grinding Glass Beads
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