1, shallow or table fertilizer application. Fertilizers are volatile, lose or hard to reach the roots of crops, and are not conducive to crop absorption, resulting in low fertilizer utilization. The fertilizer should be applied 16-26 cm below the side of the seed or plant. 2, excessive use of chlorine fertilizer on leaf (stem) dishes. The compound fertilizer produced with ammonium chloride and potassium chloride is called double-chlorine fertilizer, containing about 30% chlorine, easy to burn seedlings, and timely watering. Saline land and chlorine-sensitive crops cannot be applied Use chlorine-containing fertilizer. Excessive application of potassium chloride to leaf (stem) vegetables not only causes the vegetables not to be tender and has many fibers, but also makes the vegetables taste bitter, has poor taste, and has low benefits. Urine-based compound fertilizers have high nitrogen content, biuret nitrogen is also slightly higher, and easy to burn seedlings. Pay attention to the depth of watering and fertilization. 3, fertilization method. Due to improper application methods, it may cause fertilizer damage, burning seedlings, wilting plants and so on. For example, one-time application of too much fertilizer or insufficient soil moisture after fertilization will result in excessively high concentration of soil solution and difficulty in water absorption in the crop roots, resulting in wilting and even dead plants. In addition, when there is too much ammonium nitrogen in the soil, the plants will absorb too much ammonia and cause ammonia poisoning. 4, excessive use of a nutrient element. In this way, not only will the crops be poisoned, but also the absorption of nutrients by crops will be hindered, leading to deficiency of the disease. For example, excessive application of nitrogen can cause calcium deficiency; excessive nitrate-nitrogen can cause loss of molybdenum chlorosis; excessive potassium can reduce the effectiveness of calcium, magnesium, and boron; excessive phosphorus can reduce the effectiveness of calcium, zinc, and boron. 5, fresh human waste directly applied to vegetables. In the decay process of unfammified livestock and poultry manure, a large amount of harmful gases such as hydrogen sulfide are generated, easily suffocating vegetables and seeds; and generate a lot of heat, which easily causes vegetable seeds to burn or root rot, and is not conducive to vegetable seeds. Sprout growth. High speed Auto- Recovery zipper Door
Auto Recovery Rapid Door
Zippered Quick door Features
Open: 1.2-2.0m/Sec
High airtight energy efficient : Zipper patented technology and curtain rail technology combines high seal ability for maximum energy efficiency
Self-healing maintenance cost savings :When the door by the impact and dislocation occurs , repeat mosaic patented technology that is deralling repair system starts automatically , without any manual and automatic reset to its original state force to effectively reduce maintenance time saving cost
High security : Curtain soft and elastic , without any load at the bottom of the door to change , to ensure that the operator in an emergency state in the collision to the door when the operation will not cause harm
Push pull dual hinge system :unmatched safety record and absolute tightness in push pull twin shaft system, loading close dependence and the curtain at the bottom of the traditional fast door to achieve , you can drive dual axis system so that the upper curtain sprocket perfect bite does not depend on the door of its own weight can be achieved fast closing , this patented technology to avoid the hard parts usage of
More than one million times the durability performance : speed doors reduce the use of materials , easy to wear , strong and flexible curtain is very durable , can withstand million of opening and closing operation ,
in the use of some products has reached 500 million times for opening and closing
The soft curtain anti-collision fast door has simple structure design, which is beneficial to stable operation, reduces the frequency of repairing and replacing wearing parts, effectively improves the durability and service life of the equipment, and the curtain can be derailed in the event of an accidental impact, and during the ascent Automatic reset, no need to manually repair and reset the whole process. Auto Recovery Fast Door, AGV high speed door, AGV room high speed Door SHENZHEN HONGFA AUTOMATIC DOOR CO., LTD , https://www.hongfafrs.com
Heating devices are included on both sides of the column.
The structural design of this product is characterized by trouble-free operation up to 150,000 times per year. It has the highest practicality and the lowest maintenance cost.
Five kinds of chemical fertilizer application methods are unreasonable