1. Variety selection
Choose strong cauliflower varieties with strong growth, good heat resistance, strong disease resistance, and early maturity.
2. Timely sowing
The sowing date depends on the characteristics of the variety and the climate conditions in each place. The suitable sowing period in Zhengzhou area is from June 20 to July 10.
3. Cultivate strong seedlings
The criteria for strong seedlings are as follows: calendar seedling age is 20 to 25 days, physiological seedling age is 4 to 5 true leaves, leaf area is large, stem diameter is large, and root system is developed. Before growing seedlings, nutrient soil is prepared at a ratio of 6:4 using sterile field soil (preferably to a site not planted with cruciferous vegetables) and decomposed organic fertilizer, and 500 g of compound fertilizer per cubic meter of nutrient soil is added. 100 grams of mycelium and 100 grams of trichlorfon are used to make wolfberry after blending. Before sowing, first soak the nutrient pods, sow the seeds after soaking. Each seedling is sown with 1 to 3 seeds. After sowing, it is covered with a layer of fine dry earth with a thickness of 0.5 to 1 cm. It is best to cover the shade net on a seedbed. To prevent rainstorms.
4. Reasonable dense planting
Calendar seedling age of 20 to 25 days, physiological seedlings can reach 4 true leaves when planting. The cauliflower has a well-developed root system and requires a relatively large amount of fertilizer. Before planting, sufficient base fertilizer should be applied. Each farmhouse must have 10 cubic meters of farmyard fertilizer or 200 kg of cake fertilizer and 25 kg of compound fertilizer. The ridge is 15 centimeters high and 50 centimeters wide. The ridges are 50 centimeters wide. They are planted on the two sides of the ridge at a spacing of 40 centimeters from each other, and 2,500 to 3,000 plants are planted per acre.
5. Daejeon Management
Two large waters were continuously poured after planting to promote seedling growth. Afterwards, when watering, it is necessary to grasp the principle of seeing the land dry and wet to ensure root growth. After the emergence of the 9th true leaves of the seedlings, keep the ground moist. In combination with watering, topdressing urea 5 kg/mu every 10 days. When the flower ball appears, topdressing urea at a time is 20 kg/mu, and foliar surface is sprayed with potassium dihydrogen phosphate or Jian Bo solution.
6. Timely harvest
When the flower buds at the base of the flower bulb are slightly loose, they can be harvested. At this time, the flower bulb has been fully grown and has good quality.
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There are many types of microscopes, and they may be grouped in different ways. One way is to describe the way the instruments interact with a sample to create images, either by sending a beam of light or electrons to a sample in its optical path, or by scanning across, and a short distance from the surface of a sample using a probe. The most common microscope (and the first to be invented) is the optical microscope, which uses light to pass through a sample to produce an image. Other major types of microscopes are the fluorescence microscope, the electron microscope (both the transmission electron microscope and the scanning electron microscope) and the various types of scanning probe microscopes.
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