Straw returning can increase soil organic matter content, improve soil aggregate structure, and increase soil water and fertility performance. However, due to the fact that some farmers have not grasped this technology comprehensively, there have been some misunderstandings in farming and negative effects. This has led to the emergence of low seedling emergence, yellowing, weak seedlings, and even dead seedlings in the wheat fields after straw returning.
Misunderstanding of a carbon-nitrogen ratio imbalance. The ratio of carbon to nitrogen in the straw itself is 65 to 85:1, and the ratio of carbon to nitrogen that is suitable for microbial activity is 25:1. Nitrogen in the soil is insufficient after the straw is returned to the field, causing the microorganism to compete with the crop for nitrogen. As a result, the straw is decomposed slowly. Nitrogen deficiency and yellow, weak seedlings, poor growth. Solution: After the straw is crushed, spread 50 kg of ammonium hydroxide or 20 kg of urea on the surface of the crushed straw before rotating tillage or farmland, and then plow.
Misunderstanding two straw smash does not meet the requirements. Some crushed straws are too long and their length is more than 10 centimeters, which is not conducive to ploughing and affects sowing. Solution: Use a large straw crusher, because large horsepower of the large straw crusher machine not only crushes the straw but also crushes the straw in the rotary tillage and the soil is evenly mixed and the rotation is deeper.
Misunderstanding 3 The proportion of soil pores is irrational. After the straw is returned to the field, the soil becomes too loose and the large pores are too much. As a result, the wind is run, and the soil and seeds cannot be in close contact with each other, which affects the germination and growth of the seeds, making the roots of wheat not firmly rooted or even hanging. So, how can we remedy the above defects and ensure stable production and high output? In addition to taking the above targeted measures, but also pay attention to the following aspects: 1, improve soil moisture. 2, improve the quality of sowing. Straw returned to the plot to improve the quality of sowing. 3, timely suppression of watering. After wheat is sown, it is allowed to dry for one day and then pressed with sarcophagus to compact the soil and eliminate large holes. The ratio of size and pores is reasonable. The seed is in close contact with the soil, which is conducive to germinating and rooting. It can avoid the phenomenon of wheat hanging. 4, eliminate pathogens. Sick stalks cannot be directly returned to the field, otherwise summer corn is prone to disease, and such stalks should be destroyed or used after high-temperature heap rot.
Germany imported beads
Imported French lens
mould Die-casting Eight edge type Revolving arm
Optional emergency power supply≥3 hours
The main features:
1)Ideal cold light effects
Using the new LED cold light source, ensure energy saving and environmental protection and long service life up to 80,000hours and more.
The temperature increase of surgeon`s head below 1℃. LED do not engender infrared ray and ultraviolet radiation, without the temperature
rise and tissue damage caused by halogen shadowless light, also it can accelerate the wound healing after surgery, and without Radiation pollution.
With color temperature constant and soft, LED is very close to the sunshine.
1) Excellent shadowless effect
Lamp with the most scientific radian and Multi point light source design, ensure better uniform illuminance. When the lamps are partially occluded,
also can achieve perfect shadowless effect.Lamp panel radius of gyration ≥182cm, the lamp can be pulled to vertical floor, convenient to any angle illumination.
2) Excellent deep lighting
It is based on modularize method by Computer Aided Design, focused to irradiating with more beams of LED. It produces the deep lighting which beams
more than 1200cm,the illumination of center up to 180,000Lux or more, and offer the color temperature that can be adjusted from 3700K to 5000K which
is close to sunshine. Absolutely, it really reflects the color of human tissue and satisfied by all kinds of operating light needs.
3) Advanced control system
The use of liquid crystal display button control, to meet the needs of the medical staff of different patients with the brightness of the operation.
It offers illuminance memory function.
It does not effect using when a single circuit or one bulb is broken.
4) Universal suspension system
Rotating arm, a new type of alloy material is made of eight edge type.
Balanced system using imported arm module, more than 5 group universal joints, every cantilever must has more than 3 joints which can be rotated in 360°,
The structure is light, easy to manipulate, accurate positioning, can provide the maximum range of regulation.The equipped with fatigue correcting unit and
fix position hand handle device, easy to fix position after long time use.
5) Modern laminar lamp
The thickest part of lamp-chimney is not more than 10cm.
The lamp-chimney is made of ABS, The handle on the central of lamp can be detachable, can take high temperature (≤ 134°C) sterilization treatment,
easily adjust, flexible fixed.
Mobile Type Operating Light,LED Examination Light,Mobile Operation LED Light,Mobile Stand Operating Light
Shandong Kang'erjian Medical Technology Ltd. , https://www.operatingtable.nl