Cauliflower needs fertilizer characteristics and fertilization techniques Fertilization characteristics Cauliflower is a cruciferous Brassica herb. Cauliflower has strong adaptability to soil, and is suitable for sandy loam and loam with rich organic matter and strong water and fertilizer retention capacity. The growth cycle of broccoli includes germination, seedling, rosette, and flower formation.
Cauliflower has a long growing period and requires a large amount of nutrients. The most needed amount is nitrogen and potassium. Cauliflower requires a large amount of nitrogen fertilizer throughout the growth process, especially when the leaf clusters grow vigorously, and more nitrogen is needed. The absorption of potassium and potassium is concentrated in the flower growth stage. In addition, the demand for boron, magnesium, calcium and molybdenum is also relatively large. In general, each production of broccoli 1000kg product requires about 13.4kg of nitrogen, 3.93kg of phosphorus pentoxide, 9.59kg of potassium oxide, and an absorption ratio of 1:0.3:0.7. The growth period of urea broccoli is different. The demand for nutrients is different. Before the flower buds appear, the nutrient absorption is less. With the appearance and expansion of the flower buds, the absorption of nutrients by the plants increases rapidly. The flower swell is the most nutrient absorption of broccoli. The fastest period, so in the process of flower bud differentiation and flower ball development, if the nitrogen supply is insufficient, the nutrients in the leaves will be transported to the flower ball, and the lower leaves will turn yellow or even fall off, while ensuring the phosphorus and potassium nutrients. Full supply, so the expansion of the flower ball should be applied to the fertilizer. Cauliflower requires a high calcium content and is a typical calcium-loving crop. When the soil is deficient in calcium or physiological calcium deficiency is caused by other environmental factors, the symptoms of dry leaves often appear, which affects the yield and quality of vegetables. Cauliflower requires more boron and is sensitive to boron. Boron deficiency can cause cracking or lobular leaf stalks, and the center of the stem is cracked. The flower bulbs have brown spots and bitter taste, which affects yield and quality. Cauliflower has special requirements for molybdenum, and the typical symptom of molybdenum deficiency is “whip diseaseâ€.
Fertilization technology The fertilization amount per mu of broccoli is 2500-3000kg (or commercial organic fertilizer 350-400kg), nitrogen fertilizer (N) 20-23kg, phosphate fertilizer (P2O5) 6-8kg, potassium fertilizer (K2O) 11-14kg, Organic fertilizer is used as base fertilizer, nitrogen and potassium fertilizer are divided into base fertilizer and top dressing, and phosphate fertilizer is used as base fertilizer, and fertilizer and farmyard manure (or commercial organic fertilizer) are mixedly applied. Welcome to the company **http://
1. Base fertilizer. Base fertilizer application of farmhouse fertilizer 2500-3000kg per mu (or commercial organic fertilizer 350-400kg), urea 6kg, diammonium phosphate 13-17kg, potassium sulfate 7-8kg, soil boron deficiency can be applied 0.5kg per mus.
2. Topdressing. Rose dressing during the rose period: 10-11 kg of urea and 5-6 kg of potassium sulfate to promote flower bud, flower bud differentiation and flower ball formation. The early stage topdressing of the flower ball: 13-15 kg of urea and 6-8 kg of potassium sulfate to promote the rapid expansion of the flower ball and prevent the hollow stem. The flower ball forms a medium-term topdressing: 10-11 kg of urea and 5-6 kg of potassium sulfate to increase the yield of the flower ball and the quality of the flower ball.
3. Root dressing. Soil calcium deficiency can be applied to 0.3%-0.5% calcium chloride or calcium nitrate aqueous solution in the rosette-balloon stage. Boron deficiency can be applied to 0.1% to 0.2% of borax solution at the initial and mid-term foliar formation. Magnesium-deficient can be sprayed with 0.2% to 0.4% magnesium sulfate solution 1 or 2 times. Cauliflower requires very little molybdenum, but it is very sensitive. During the flower formation period, the ammonium molybdate solution can be sprayed at a concentration of 0.01%. Facility cultivation can supplement carbon dioxide gas fertilizer.
There are two types of sensors for Tri-proof Light; one is infrared induction, and the other is microwave induction.
Both types of sensors can control the following values through the remote control shown in the picture below:
1. Can set the light value. If the value of the ambient light meets the light value you set, it will not turn on even if there is a moving signal. When the ambient light does not meet the set value, the light will turn on.
2. The waiting time can be set. That is, how long the light stays low after the person leaves the sensing area.
3. Set the delay time, that is, how long the light stays in the full-on state after the person leaves the sensing area.
4. Set the preset brightness: you can set the full brightness and low brightness.
5. Set the detection range.
6. Remote control distance: You can set the distance range of the remote control sensor.
The function:
1.Switch function (stand-by period is set to "0s")
2.Two-stage dimming function (stand-by period is set to "+∞")
3.Three-stage dimming function (stand-by period is set to "0s/30s/10min/ +∞")
In addition, the LED Tri-proof Light can be waterproof, dustproof and anti-corrosion. Therefore, the Sensor Tri-Proof Light is especially suitable for parking lots.
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SHENZHEN LITEHOME OPTOELECTRONIC TECHNOLOGY CO., LTD. , https://www.szlitehomelight.com