The key points of how to plant spring corn well

In order to plant spring corn well and strive for a good harvest after autumn, we should grasp the following measures: the growth period of spring corn should be more than 112 days. The improved varieties with developed root system, compact plant type, leaf upward rush, strong growth, strong resistance, single ear and large grain type, such as Nongda 108, Shenshi 29, Tangkang 8, etc. The seeds should be carefully selected before sowing, and the small, diseased and blighted seeds should be removed and sunburned for 2-3 days, which can enhance the water absorption capacity of the seeds, emerge early, improve the seed purity, reduce the offspring seedlings, and improve the seedling uniformity. Advocate seed coating: uncoated seeds are required to press the bell with 50 grams of nail and add a "must harvest" to mix 20 kilograms of corn seeds, which has the effect of controlling underground pests and early emergence of seedlings. Select the best sowing time: spring corn requires suitable sowing time, soil moisture is sufficient in early May, spring and white land is ploughed in autumn, after winter irrigation, early spring should be raked and rolled to preserve soil moisture, high-yield fields can be properly late sown when soil moisture permits, May 5-15, which is beneficial to the high yield of corn. The general sowing date is about April 25 to May 5. Increase the application of fertilizer: increase the application of phosphorus and potassium fertilizer and adjust the ratio of nitrogen, phosphorus and potassium. 1. 1200 jin of corn per mu, 20 kg of diammonium per mu, 25 kg of urea and 15 kg of potassium sulfate per mu to achieve comprehensive fertilization, N.P.K ratio 2. Fertilization time method: 70% 0 chemical fertilizer at sowing time, adding all phosphorus and potassium fertilizer one-time bottom application or side ditch deep application, another 30% 0 chemical fertilizer, one-time topdressing in the 10-leaf exhibition, 15 cm on the side of the seedling, 15 cm deep. 3. Planting form density: spring sowing corn advocated equal row spacing parallel sowing, Nongda 108,Shenshi 29, Tangkang 8, row spacing 1.8ft, plant spacing 0.95ft, keeping 3500 seedlings per mu. Gaoyou 115,2 feet between rows, 1 foot between plants, and 3000 seedlings per mu. 4. Sowing techniques: in villages with conditions, machine sowing or double-floor sowing is advocated, the sowing rate is 4 jin / mu, seeds and fertilizers are separated, and fertilizer is applied 3-4 cm below the seeds to prevent burning seedlings and promote seed rooting. Unconditionally, small moldboard can be ditched and sown seeds by hand, with a sowing rate of 5-6 jin / mu. With a good grasp of the above measures, we will set up a high-yield shelf and get an ideal corn yield after autumn.