Early spring planting management techniques for spring maize

Spring ploughing This year, the spring precipitation in our province is general, and the sorghum, especially the seeding layer (0~10 cm), is the first thing that should be considered for spring ploughing. It is advisable to sown directly in the spring or to move the soil as little as possible. If the deep ploughing is not carried out in the autumn, the soil is thawed in the spring and the deep pine fertilization machine is used for deep pine fertilization (about 30 cm in depth), and then shallow rotation is used for sowing.

Select the species to choose "insurance". The so-called "insurance" species is a variety that has been grown locally for at least two years and is performing well. For the "fresh" species that have not been planted in the local area, it is necessary to pass the trial test and then expand the area. Seeds should also be selected according to the conditions of cultivated land. For plots with good water and fertilizer conditions, density should be increased, and dense-density varieties should be selected. The water and fertilizer conditions are generally dry land with less rainfall, and the large panicle varieties and the dense-tolerant varieties are all optional, and the growth period should be appropriate. You should go to a regular sales outlet to buy seeds. Don't buy cheap seeds that are unclear.

A seeding germination test should be carried out on the purchased seeds before sowing and sowing. If single seeding is used, the germination rate should not be lower than 95%. It is necessary to carry out sowing according to the ground temperature, and it is generally carried out when the lowest temperature of 5 to 10 cm soil layer is stable at 10 °C. Generally, the depth of the sowing is 5 to 7 cm, and the sputum is easy to be shallow. Seeding should check the quality of sowing. If there is inconsistency in sowing depth, broadcast to dry soil layer or there is a broken strip, it should be communicated with the tractor hand in time to correct it in time. It must be suppressed in time after planting. The density should be sown strictly according to the density required by the variety description. It is necessary to select the seeder with good seeding effect and the seeder and the operation level to carry out sowing.

The fertilization method of fertilized rice should be applied flexibly according to climatic conditions, planting density, soil fertility level, and the type and quantity of fertilizer applied. The base fertilizer should be applied, and the amount of fertilizer should be appropriate. In general, phosphate fertilizer and potassium fertilizer can be applied as a base fertilizer at one time. Nitrogen fertilizer should be applied in different times, 30% of the base fertilizer should be applied, and 70% should be applied. It is recommended that the base fertilizer be applied with the subsoiler, and if the surface is applied, it should be turned into the soil. Top dressing generally uses ditch or acupoint application. The depth is more than 5 cm, about 10 cm from the seedling, pay attention not to burn the seedlings.

The pests and diseases of underground pests are mainly caused by golden worms, mites, mites and small tigers, which have a great impact on corn yield. Before the corn is planted, use 0.25 liters of 50% phoxim emulsion per acre, mix 25~30 kg of fine soil, make toxic soil, spread it evenly on the ground, and then plow it into the soil. It is also possible to purchase insecticide seeds in the seed coating. The disease at the seedling stage of maize is mainly caused by Pythium, Fusarium oxysporum, bacterial blight and root rot. For the prevention and treatment of squatting disease, 50 kg of seeds can be mixed with 10% water-soluble water agent or 5% root treasure 50-100 ml; when seedlings are wilted or withered, 72.2% Plex water can be used 500-800 times , 58% Redolmul Mn-Zn wettable powder 500 times liquid or 72% gram dew WP 600 times liquid spray.

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