Reasonable determination of the sowing date of corn is an important part of achieving high yield of corn. Some friends mistakenly believe that the sooner the corn is planted, the better. Actually, it is not. Corn seeds generally germinate at 6 ° C - 7 ° C, but the germination is extremely slow, sowing too early, the temperature changes sharply in early spring, the seeds are susceptible to freezing damage after seed germination and lose viability, reducing the emergence rate; in addition, sowing too early, corn Seed germination time is longer, it is easy to be infected by harmful microorganisms in the soil and mildew, causing rotten seeds and lack of seedlings; too late sowing will affect the agricultural time. The suitable sowing date of corn should be determined according to the local temperature, soil temperature, moisture, variety characteristics and planting pattern. Generally, the following principles are followed: 1. When farming is available. Corn seeds begin to germinate at 6 ° C ~ 7 ° C, but the germination is slow, easy to be infected by pathogens and pests, herbicides, generally the ground temperature of 5 ~ 10 cm soil layer is stable at 8 ° C ~ 10 ° C, as spring corn suitable The standard for the start of the sowing date. Early land preparation and good grounding are prerequisites for timely planting. During the spring sowing, the temperature rises rapidly, and the best sowing period is usually only about 10 days. It is necessary to broadcast early and shorten the sowing date. Sowing too late, it is easy to be greedy and late, and the frost will reduce production. Generally, the suitable sowing date for the spring maize area is mid-April to late-May to May and mid-May. 2. When the ground temperature permits, the plots with better soil moisture can be sown early; in early dry and windy areas, timely early sowing is beneficial to the use of spring scorpion to capture whole seedlings; mulch + drip irrigation plots can be broadcast earlier than open field 7 to 10 days is conducive to prolonging the growth period, enhancing resistance, reducing pests and diseases, promoting root stalks, thick stalks at the base, and enhancing resistance to lodging and drought. 3. In the process of seeding and emergence of corn, if it encounters extreme weather conditions, pests and diseases, soil preparation quality and other factors, it is necessary to ensure the quality of sowing, to achieve the premise of Miaoquan, Miaoqi, Miaoyun and Miaozhuang, and adjust the sowing date in time according to local conditions. For areas with large snowfall and low temperature in spring, the sowing date should be appropriately delayed according to the increase of ground temperature to ensure the normal germination and emergence of seeds, and it is beneficial to strong seedlings. 4. Control the corn planting time at the latest. Grain and feed silage corn can be delayed by 15-20 days compared to the latest sowing time. Corn sowing has the saying that "spring fights for the day, summer fights", spring sowing in the middle and late April, interplanting corn in the middle of late May to early June. After selecting good varieties and seeds, proper sowing can lay the foundation for higher yields and benefits. water works metal to metal seat swing check valve, resilient seat swing check valve, ball check valve, ductile iron non return valve, nozzle check valve, rubber capsuled disc swing check valve, slanted check valve, butterfly check valve, tilting disc check valve, gunmetal seat swing check valve, dual plate check valve, ductile iron check valve, PN25 swing check valve, double door swing check valve BS6153 Non Return Valve,Double Check Valve,Wafer Check Valve,Ball Check Valve, check valve with lever and weight, WRAS check valve SUZHOU RSF VALVE CO.,LTD , https://www.rsf-valve.com
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