Autumn pumpkin planting is stressful

1. Select the variety: choose the fine variety. It can be used for seed dressing with new high-fat film (can be mixed with seed coating agent), can avoid underground pests and diseases, isolate virus infection, does not affect germination and swelling function, strengthens breathing intensity and improves seed germination rate.

2, sowing seedlings: autumn pumpkins are best to be planted from mid-July to early August. It is best to use seedlings for seedlings, covering 1~1.5 cm of fine soil with radicles facing down, and then covering 1 layer of straw or weeds.

3. Site preparation: Before arable land, the farmyard manure should be applied, potassium sulfate compound fertilizer, potassium sulfate, and deep cultivation. However, planting should be carried out after 5 pm or on cloudy days. After planting or direct seeding, watering once and spraying new high-fat film can effectively prevent the moisture on the ground from evaporating, the moisture of the seedlings is not transpiration, isolate pests and diseases, shorten the slow seedling period, quickly adapt to the new environment, and grow healthily.

4. Field management: When the pumpkin grows 3~4 true leaves, spraying the flower promotion king No. 3 inhibits the main shoots from growing wild, promoting flower bud differentiation, more flowering, improving pollen fertilization quality, more flowering, more sitting melons, and preventing fruit drop. Promote development. And in the young fruit period, fruit expansion period spray Zhuang Gu Ti Ling, strengthen the nutritional directional transport, promote the rapid development of the melon body, the growth cycle does not fall, no melon, no cracked melon, no deformed melon. At the same time, it is necessary to spray a new high-fat film to form a protective film to prevent the invasion of germs and improve the quality of the pumpkin.

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Marine Valve Parts


The valve stem is an important part of the valve. It is used to drive, connect the actuating mechanism or handle, and directly drive the spool to move or rotate, so as to realize the function of valve switch or regulation.Valve stem in the valve opening and closing process is not only moving parts, stress components, but also seals. At the same time, it is subjected to the impact and corrosion of the medium, and it also causes friction with the packing. Therefore, in selecting the stem material, it must be guaranteed that it has sufficient strength at the prescribed temperature, good impact toughness, scratch resistance, corrosion resistance. The valve stem is a vulnerable part, and the mechanical performance and heat treatment performance of the material should be paid attention to when selecting.The valve stem in the valve opening and closing process, under tension, compression and torsion force, and direct contact with the media, as well as the relative motion between the friction and filler, so in the choice of stem material, must ensure that it provides adequate temperature strength, good impact toughness, abrasion resistance and corrosion resistance of.


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