How to sow the spring corn?
Appropriate sowing date of corn depends on local conditions such as temperature, soil temperature, lyrics, species characteristics and planting patterns. At present, we have entered the sowing period for spring corn. Today, Xiao Bian and everyone have come to understand how to plant spring corn.
How to sow the spring corn?
First, the principle of determining the planting time of spring sowing corn:
1. Suitable for farming. Corn seeds start to germinate at 6°C～7°C, but germinate slowly and are easily affected by pathogens, pests and herbicides. Generally, the ground temperature of 5～10cm soil layer is stable at 8°C～10°C, which is suitable for spring corn. The date of the start of sowing. Early and well-grounded, well-prepared land is a prerequisite for timely planting. During spring sowing, the temperature rises quickly, and the best sowing time is generally only about 10 days. It is necessary to broadcast early and reduce the sowing date. Sowing late, it is easy to become greedy and late, and reduce the production of frost. The suitable sowing date for spring maize in general is from mid-to-late April to mid-May.
2. When the ground temperature permits, the plots with better soil moisture content can be plucked and sowed early; in early spring drought and windy areas, timely early sowing is favorable for the use of spring crops; the mulch + drip-irrigated plots can be sowed earlier than the open ground. 7 to 10 days will help extend the growth period, increase the resistance, reduce the damage of pests and diseases, and promote the roots under the bar, the base of the thick stalks, and enhance resistance to lodging and drought resistance.
3. During the seedling emergence process of maize, if extreme weather conditions, pests and diseases, and the quality of soil preparation are affected, it is necessary to ensure the quality of seeding, and to achieve the conditions of seedling production, Miao Qi, Miao Lian, and Miao Zhuang, and timely adjust the sowing date according to local conditions. For regions with heavy snowfall and low temperatures in spring, the sowing of temperature should be appropriately delayed to ensure normal germination and emergence of seed, which in turn is beneficial to strong seedlings.
4. Control the latest sowing time of corn. Grain and feed silage corn can be delayed by 15-20 days than the latest sowing time.
Second, the spring sowing corn management technology points:
1, select the appropriate species. According to local conditions, it is appropriate to choose suitable road-optimized species. According to the thermal resources and actual production of Changzhi County, mid-late-maturing varieties with a growth period of 120-130 days should be selected.
2, fine soil preparation. Spring maize requires deep plowing, and the sooner the autumn plowing, the better. After the harvest of the former crop, the stubble crop is promptly extirpated, which is beneficial to soil maturation, water storage and conservation, elimination of diseases, insects, and weeds. After cultivating, you must take care of it. In late autumn and early spring, we must also carry out work. In areas where the spring drought is severe, continuous operations such as pressure, concrete, and ramming are used to make the soil compact and more conducive to lifting and protecting the soil. For areas where the soil moisture content is good, direct sowing can be done. For areas with insufficient moisture, make up for sowing.
3, seed selection and processing. It is best to choose the seed to be coated when purchasing the seed. For seeds that have not been coated, seed processing such as seed selection, sun seeding, and seed dressing for seed dressing should be done before sowing. 50% phoxim EC 50g can be used as a seed dressing. After adding 1.0 kg of water and evenly mixing, evenly spray on 20 to 30 kg of seed, boring 3 to 4 hours to spread out, and drying after sowing can effectively control underground pests; 25% triadimefon wettable powder can be seeded with 0.3%～0.5% of the seed amount, or with 12.5% ​​speedup WP according to the seed amount of 0.4%～0.5%, which can effectively prevent corn schistosomiasis and other diseases occur.
4, suitable for sowing. The early sowing of spring corn can easily lead to low-temperature rotten seedlings and the emergence of seedlings is uneven, and sowing late can lead to late grain failure. When the soil surface is 5 to 10 cm deep and the temperature is above 10 to 12°C, sowing can be performed.
5, apply enough base fertilizer. Due to the long growing period of spring corn, the principle of using multiple substrates should be mastered when using base fertilizers. Organic fertilizers should also be used as base fertilizers, combined with one-time application of soil preparation, and generally 2000 kg organic fertilizer per acre. At the same time, with the application of chemical fertilizers, 30% of the total amount of nitrogen fertilizer can be used as the base fertilizer. Phosphorus and potassium fertilizers can be used as seed fertilizers when applied at the time of sowing. Usually, 15 kg of ammonium phosphate, 10 kg of potassium sulfate, and sulfuric acid are applied. Zinc 1 to 1.5 kg.
6, rational close planting. Increasing planting density is an important factor in achieving high yields of spring maize. The soil fertility of higher plots is generally more than 4,000 planting densities; the lower soil fertility plots are suitable for 3500-4000 plants per acre, and the sowing volume is 2 to 2.5 kilograms.
7, chemical weeding technology. We must choose safe and reliable herbicides for corn fields and master their correct methods of use. Chemical herbicides used in general spring corn fields can be treated with soil remediation agents such as et al. For a block with poor soil sealing effect, it can also be used in the 3 to 5 leaf stage of corn. When the weed grows to 2 to 4 leaf stage, 4% of Yu Nongle Suspension is used in an amount of 100 liters per mu, and the amount of water is 30 to 50 kilograms were sprayed to kill weeds.
8, pay attention to check seedlings fill seedlings. In the emergence period of corn, it is necessary to check the emergence of seedlings.
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