Spring corn early spring planting management technology

The focus of early spring corn management is to ensure timely seeding, increase the emergence rate, and ensure that the seedlings are uniform and strong.

Spring plowing This year, the spring rainfall in our province is average, and the protection of water chestnuts, especially the sowing layer (0-10 cm), is the first consideration of spring plowing. In the spring, the soil should be sown directly or as little as possible. If deep ploughing is not carried out in autumn, in the spring the soil will be thawed with a deep-soil fertilizing integrated machine for deep-soil fertilization (about 30 cm deep), and then seeded with shallow spin suppression.

Select the "insurance" species. The so-called "insurance" species are those that have been grown locally for at least two years and perform well. For "fresh" species that have not been planted in the local area, they must be tested and tested to expand the area and promoted. Seeds should also be selected according to cultivated land conditions. For plots with good water and fertilizer conditions, the density should be increased, and dense varieties should be selected. Water and fertilizer conditions are common or in drylands with less rainfall. Large spike varieties and dense-tolerant varieties are optional, and the growth period should be appropriate. You should go to regular sales outlets to buy seeds. Don't try to buy seeds from unknown sources cheaply.

Before sowing, a sample germination test should be carried out on the purchased seeds. If it is single seed on-demand, the germination rate cannot be lower than 95%. To sow according to the ground temperature, sowing can usually be carried out when the minimum temperature of the soil layer of 5 to 10 cm is stable at 10 ° C. Generally, the sowing depth is 5 to 7 cm. It is easy to shallow, and the difference is easy to deep. Check the quality of seeding. If there is inconsistent seeding depth, seeding on dry soil or broken strips, timely communicate with the tractor hand and correct in time. Repress in time after sowing. Density should be planted in strict accordance with the density required by the variety description. It is necessary to choose a good seeding effect and a planter with a high level of operation for seeding.

The fertilization method of fertilizing rice should be flexibly applied according to climatic conditions, planting density, soil fertility level, and the type and amount of fertilizers applied. Base fertilizer should be applied adequately, and appropriate amount of seed fertilizer should be used. Generally speaking, phosphate fertilizer and potassium fertilizer can be used as a base fertilizer at one time. Nitrogen fertilizer should be applied in stages, bottom fertilizer at 30% and topdressing at 70%. It is recommended to apply the fertilizer with a subsoiler for bottom fertilizer application. Topdressing generally uses furrow application or acupoint application. Depth 5 cm or more, about 10 cm from the seedlings, be careful not to burn them.

Disease and pest control The main types of underground pests are gold needles, crickets, maggots, and small tigers, which have a great impact on maize yield. Before corn sowing, use 0.25 liters of 50% phoxim emulsion per acre, mix 25-30 kilograms of fine soil to make poisonous soil, spread it evenly on the ground, and then plough the soil. Seed coatings can also be purchased with insecticide seeds. Maize diseases at seedling stage are mainly dysentery caused by Pythium, Fusarium beadium, seedling blight and root rot. For prevention and treatment of cataplexy disease, 10% Shilesi water solution or 5% Genbao 50 ～ 100ml mixed seeds and 50kg can be used; when seedling wilting or withering disease is found, 72.2% pleic water solution 500-800 times liquid can be used , 58% Redomier Mn-Zn wettable powder 500 times liquid or 72% gram dew wettable powder 600 times liquid spray.

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