Chestnut trees have a long fruiting period, a large amount of results, and consume more nutrients. Before the fruit matures, the tree vigor is in a state of starvation and semi-starvation. If nutrition is not added in time, it will seriously affect the flowering results in the coming year. Therefore, it is very important to apply chestnut pre-harvest fertilizer and post-harvest fertilizer to accelerate the restoration of tree vigor and promote the tree vigor so as to lay a good foundation for high yield and stable production in the second year. The specific approach is as follows:
When the chestnut fruit turns brown, the pre-harvest fertilizer is dominated by quick-acting fertilizers. The strain results in trees of 50 kg or more. Each plant applies 1.5-2 kg of urea and 0.5-1 kg of potassium chloride, and spreads it after the rain. The post-harvest fertilizer is applied within 5-10 days after the fruit is harvested, mainly NPK fertilizer and high-quality organic fertilizer. Each NPK fertilizer is 2-3 kg, and the cooked man and livestock poultry manure is 25-30. kg. Draw dripping lines around the canopy and dig depth and width of each 25-30 cm ring ditch for fertilization. If the weather is dry, fertilize each tree after fertilization and apply 80-100 kg of decomposed human or animal manure water to promote fertilizer dissolution and transformation, supply root absorption and utilization, and improve fertilizer application. In addition, before and after fruit harvesting, the leaves were sprayed with fertilizer and sprayed 2-3 times with 0.3% urea + 0.5% potassium dihydrogen phosphate + 0.2% borax mixed liquor and sprayed once every 7-10 days. Other nutrient solutions can also be used. Foliar spray fertilizer to choose no wind or breeze cloudy best, and before 9 o'clock in the morning or after 4 o'clock when the stomatal opening spray, spray heavy rain within 10 hours after spraying need to re-spray.
Audio intercom is one of the building intercom systems. It has simple functions and can meet people's daily needs. The wiring and operation are very simple and the cost is low. It is the first choice of many customers.
MK-138 audio intercom is the most popular model in our factory. The system is an intelligently programmed audio intercom system. The audio circuits are completely isolated and won`t interfere with each other. The user wire is short-circuited, which does not affect the work of the entire system.
The solution is included audio door phone, indoor unit, decoder and power supply .
An audio intercom door phone is used for each building and an indoor unit is installed in each apartment. The visitor calls the resident through audio intercom door phone, and the indoor unit rings at apartment and the resident can decide to answer .unlock or hand up .Residents can talk to the visitor. They can open the door of the building for the vistor after confirming the identity of the visitor.
Here are some parameters of this system:
1. 2-wire Nixie tube display Intercom system
2. Calling, intercom, unlocking
3. Aluminium alloy panel with physical buttons
4. Low power consumption technology solution, saving energy and long life span
5. Dimension:300*110*30(mm)
6. Install method : Wall/flush install (250*110*30mm)
7. Door opening:IC/ID card/ password/call the indoor untils unlock
Zhuhai Mingke Electronic Technology Co., Ltd. is a professional manufacturer of residential security products. It has formed a modern high-tech enterprise integrating R&D, production and sales now . The main products are video and audio intercom system, fingerprint lock, access control and smart home products.
Mingke has been committed to the cause of home security, with excellent and leading technology, and wholeheartedly provides safe security products for thousands of households; with a high sense of social responsibility, it undertakes the corporate mission of "creating a safe home for you". if you want to get our catalog,pls don`t hesitate to contact with us.
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Zhuhai Mingke Electronics Technology Co., Ltd , https://www.mingke-tech.com