Winter wheat from the emergence to winter, fertility characteristics are long roots, long leaves, long tillers, complete vernalization stage, that is, three to one is completed, the growth center is childbirth. The central task of field management is to build on the basis of conservation of seedlings, promote root growth, make weak seedlings grow stronger, and strong seedlings grow steadily to ensure that the wheat seedlings safely pass through the winter, laying a good foundation for the panicles and spikes in the coming year. First, check seedlings replant. Due to leakage of seed, lack of earthworms, underground pests and other reasons, resulting in lack of seedlings broken ridge, timely seedling reseeding, will replant the wheat seed soaked in cold water for 24 hours after drying to ensure that seedlings are seedlings uniform. Second, to eliminate seedling pests and diseases. The common seedling pests are soil maggots, migratory locusts, underground pests, and leaf rust, once they are detected and prevented. Third, overwhelming the needle. When wheat enters the three-leaf stage, the nutrients in the endosperm of the seed are exhausted. The seedlings must rely on their own photosynthesis to produce nutrients for growth and development. This is a crucial period for promoting root growth. Overwhelming the needle is a powerful measure, that is, repressing it at the three-leaf stage to control the main stem, promote the delivery of tinea, control the ground and promote the role of the root system. Fourth, scratch wheat soil. In case of rain during the tillering period, the wheat slush should be scratched in time to help remove the compaction and promote root growth. For Wang Miao, deep scratch (more than 7 cm), can play a role in root control. Saline-alkali wheat should be washed after rain and prevent back-salt from harming wheat seedlings. Fifth, pouring good winter water. Fertilizer fertilizer should be timely when appropriate, usually in the average temperature of 7 °C ~ 8 °C when the beginning of the time to about 5 °C, when the night is frozen, the amount of winter irrigation should not be too large, can be poured through the end of the day is appropriate, avoid large Flood irrigation. For the wheat seedlings with insufficient or early seeding in the basic seedlings or unfertilized seedlings, combined with winter fertigation, 5 kg to 10 kg of urea is chased every 667 square meters, prompting the wheat to return to green as early as possible, consolidate the tillering before winter, and increase the number of tillers. Rate, so that winter fertilizer spring. Six, winter urine to prevent damage to wheat seedlings. Overwintering before returning to the spring can be poured with urine, with the product with the pouring, generally about 500 kg of urine per 667 square meters, saline or alkali wheat fields when there is snow should not pour urine, pouring urine production effect is significant, about every application of 15 kilograms of fresh urine Increase production by 1 kg. VII. Covers. The farmer said good: Wheat eats lunar soil. The cover is protected against cold and seedlings. Technical points: After the wheat enters the overwintering period, the wheat seedlings will turn yellow after it is too early; when the leaves are too late, the leaves will be frozen and the operation will be difficult, which will not achieve the desired effect. After the winter irrigation, on the basis of the recalcitrant soil, bamboo shoots were used to cover the seedlings on the bamboo shoots in the Daxing Zhongrong, and the cover soil was about 2 cm. This technical measure can stabilize the temperature, reduce the evaporation of soil moisture, ensure that the wheat is green over winter, reduce the cracking of the ground, and make up for cracks. Eight, suppression. The cover is rolled 1 to 2 times before it is returned to green, and it is crushed and pulverized to make the soil fine and compact. This helps to eliminate compaction, cracking, heat preservation, and to prevent soil leakage. This is an important measure for the management of winter wheat in water-deficient wheat fields, and is another important means for drought resistance and cold-resistant seedlings. 9. It is forbidden to pass through the green leaves preserved during the overwintering period of the grazing in the wheat fields. Photosynthesis can be carried out after returning to the green. It is the main source of nutrients needed for fresh growth. Winter grazing will cause a lot of damage to this part of the green area, weakening the ability to resist cold and reducing yield. DOUBLE ANGLE MILLING CUTTER(HSSCO-TIN)
Production process: Using full CNC grinding machine, full grinding technology, with sharper tip and easier to cut the key. The cut key is smooth and burr-free;
Material: It is made of HSSM35 material imported from Japan, high temperature quenching, hardness reaches HRC64-65, ultra-high temperature quenching, high hardness, copper key and iron key are available, good wear resistance
Suit for machine: It is suitable for all kinds of single-head and double-head key machines. It can be used by any quality machine. It does not need to change the machine and also can process copper keys and iron keys on same key machine. No longer needs to change the cutter.
Before running the machine, it is necessary to accurately adjust the cutter to ensure the key blank and the parent key are matching, and to avoid the tool being broken due to the unstable key assembly.
The cutter is clamped on the machine and the key blank and the parent key are fixed on the clamps. Do not clamp the key blank too tight. The patent key is close to the tracer and the key blank is close to the cutter. If the key blank is not fastened, the key blank should be removed and reclamped.
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