Scientific management method for fertilization in winter orangery

At present, the amount of organic fertilizer input in the southern orangery is insufficient, the acidification of the soil is serious, the amount of fertilizer used by farmers is quite different, the proportion of fertilization and the period of distribution are unreasonable, and the problem of lack of medium and trace elements is widespread. Recently, the Ministry of Agriculture issued scientific guidance on fertilization to help farmers manage the autumn and winter orangery.

The principle of fertilization pays attention to the application of organic fertilizer, vigorously develops green manure in orchard; applies appropriate amount of lime to improve soil; optimizes the reasonable application rate and period of NPK fertilizer, pays attention to the application of fruit harvesting fertilizer in autumn; and appropriately supplements trace elements.

Fertilization recommends more than 3,000 kg of orchard per mu: organic fertilizer 2~4 square/mu, nitrogen fertilizer 25~35 kg/mu, phosphate fertilizer 8~12 kg/mu, potash fertilizer 20~30 kg/mu.

Orchard 1500~3000kg orchard: organic fertilizer 2~4 square/mu, nitrogen fertilizer 20~30kg/mu, phosphate fertilizer 8~10kg/mu, potash fertilizer 15~25kg/mu.

Orchard with an output of 1500 kg or less: organic fertilizer 2~4 square/mu, nitrogen fertilizer 15~25 kg/mu, phosphate fertilizer 6~8 kg/mu, potash fertilizer 10~20 kg/mu.

Fertilizer operation in autumn and winter fertilization (harvesting fruit fertilizer): 20%~30% nitrogen fertilizer, 40%~50% phosphate fertilizer, 20%~30% potash fertilizer, all organic fertilizer applied before and after fruit harvesting from November to December; spring fertilization ( Flower fertilizer: 30%~40% nitrogen fertilizer, 30%~40% phosphate fertilizer, 20%~30% potash fertilizer applied before flowering in February~3; summer fertilization (strong fruit fertilizer): 30%~40% nitrogen fertilizer, 20% to 30% of phosphate fertilizer and 40% to 50% of potassium fertilizer are applied from June to July. Phosphate fertilizer is preferred for calcium magnesium phosphate or superphosphate. The orchard with boron and zinc deficiency in the soil is applied with 0.5~0.75 kg of borax and 1~1.5 kg of zinc sulfate per mu. It is mixed with organic fertilizer and used in autumn. For orchard with pH<5.5, apply lime or dolomite powder per acre 60~80 Kilograms, 50% applied in the fall, 50% in the summer.

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Stainless Steel Sliding Door

Characteristics and Advantages

(1) Intelligent control design: adjustable main parameter and secondary parameter automatically according to the weight of door leaves;

(2) Low noise: Special static sound track, integration of motor, worm-gear and retarder.

(3) Anti-clamping function: automatically reverse when meeting barriers;

(4) Unique electronic motor lock: the motor will lock up when the door is forced to open.(controlled by remote or switch)

(5) Tighten force: seal door when closed, power consumption approximately 10W under standby;

(6) Advanced brushless motor(36V,100W) can automatically adopt different heavy door leaves;

(7) Bi-doors inter-locking: one of the door leaves always remains closing;

(8)Safety sensor terminal: sensor stops working when door closed;

(9)Unique coating technology: never rusty;

(10)Easy and convenient to install;

(11)Working Process: when the door leaf closes to the right place, the door leaf will slightly shift to the door frame and the ground. The rubbers on the four sides of the door leaf will completely combine with door frame and ground, which ensures air tightness. When the door is open, the rubbers will separate from door frame and ground, which avoids contraction on the ground.

Technical Specification

Specification	Light Duty		Heavy Duty
Rang of the Door	Single-Leaf	Double-Leaf	Single-Leaf	Double-Leaf
Door leaf max weight	100kg	100kg x 2	200kg	200kg x 2
Mounting Method	Surface mounting or built-in mounting
Open Width	700-2000mm	650-2000mm	750-2000mm	650-2000mm
Power Supply	AC 220v Â± 10%, 50-60 Hz
Opening Speed	300-500mm/s (adjustable)
Closing Speed	250-550mm/s (adjustable)
Creep speed	30-100mm/s (adjustable)
Hold-open time	0.5-20s (adjustable)
Airproof Force (Max.)	>70N
Manual Pushing Force	<100N
Electronic Lock Force	>800N
Power consumption	150W
Ambient temperature	-20+50 C

Technical Details:

(1) Rubber lining sealing technology combined with V groove on the guide rail enables the door completely sealed when the door closed;

(2)Special door body location technology. Semicircular surface beam on the ground matches with the V style groove at the bottom of door leaf, which stop the door from swing and make sure it moves stable and smooth;

(3) The door body decorated with matte stainless steel or spray surface, and on the middle and both sides with sealing stripes to ensure the hermetic effect.

(4)Feet sensor switch applied to avoid contagion;

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