Seedlings (yellow) are cultivated for the purpose of production of harvested seedlings. Mainly through the seedling stage cultivation, the growth cycle is short, and the single plant needs less fertilizer. Due to the large planting density, the relative amount of fertilizers per unit area is relatively large. The general garlic seedlings use a small selection of petals, the mother supplies less nutrition, and therefore need to increase fertilization materials in order to obtain high-quality products.
The use of protected areas to cultivate garlic (garlic), the first is simple technology, easy to grasp, as long as the water, fertilizer, and temperature control can be produced well, the risk is small. The second is to make use of the empty space in the greenhouse or the free time between the upper and lower jaws to carry out the production process, which can increase the utilization rate of the greenhouse. The third is short production cycle and high economic benefits.
1. Need fertilizer characteristics
The growth of garlic sprouts depends mainly on the nutrients stored in the garlic clove itself. Without fertilization, the product can be obtained only if appropriate conditions such as temperature, moisture, and light are given. However, continuous harvesting, only adequate supply of nutrients can increase the yield and quality of garlic. Because of the short growth period of garlic seedlings and the low frequency of topdressing, it is necessary to apply basal fertilizer. According to studies, soilless cultivation of garlic seedlings has significantly increased nitrogen, phosphorus and potassium fertilizers. Among them, nitrogen> phosphorus> potassium. Nitrogen and phosphorus fertilizers have a significant interaction effect. At the N260mg/L, P2O560.68mg/L and K2O39.67mg/L, the garlic yield was the highest.
2. Fertilization technology
(1) Base fertilizer. When garlic is grown in a greenhouse or a greenhouse, many garlic heads are planted directly on the ground. Before planting, put 150 000 kg of high-quality farmyard fertilizer per hectare, smashed on the ground, deep-dip 20-25 cm, mix fertilizer and soil, and flatten it.
(2) Dressing. When the greenhouse is cultivated and the base fertilizer is applied, it is generally not necessary to top-dress the garlic. However, in the absence of nitrogen fertilizers that affect growth, ammonium phosphate can be used to dissolve the water and top 225 to 300 kg per hectare. The fertilizer cannot be applied directly and then watered. In order to promote the rapid growth of garlic seedlings, when the seedling height is 20 cm, 200 times of ammonium nitrate fertilizer solution can be used to water once, and 75-90 kg of ammonium nitrate per hectare; potassium dihydrogen phosphate, high yield element, urea, etc. can also be used for foliar dressing. After each foliar dressing, spray both sides with clean water to avoid fertilizer damage.
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