PLANTING AND MANAGEMENT TECHNIQUES OF MAIZE IN EARLY SPRING

The key point of early spring maize management is to ensure timely sowing, increase the rate of emergence and ensure that the seedlings are strong.

Spring plowing, this year spring precipitation in our province in general, moisture preservation, especially sowing layer (0 ~ 10 cm) moisture is the first should be considered in spring plowing. Spring fixed soil directly sowing or as little as possible soil, to level the appropriate sowing appropriate appropriate. If deep tillage is not practiced in the fall, deep loosening is used in the spring when the Soil Thaws

One machine for deep fertilization (depth of about 30 cm) , and then the shallow rotation suppression sowing.

Seed Selection

Choose the "safe" variety. The so-called "safe" species are those that have been grown locally for at least two years and have performed well. As for the "fresh" species which have not been planted locally, we should try them out and expand the area to popularize them. Seed selection should also be based on cultivated land conditions. Water and fertilizer conditions good plot, should increase the density, select density-resistant varieties. Water and fertilizer conditions in general or less rainfall in dry land, big ear varieties and dense varieties are optional, suitable growth period. Should go to the formal sales outlets to buy seeds, do not buy cheap seeds from unknown sources.

Before sowing, a sampling germination test should be carried out on the purchased seeds. If the seeds are sown on a single seed, the germination rate should not be less than 95% . According to the ground temperature for sowing, generally in the 5 ~ 10 cm soil layer low temperature stability at 10 °C can be sowing. GENERALLY SOWS THE DEPTH 5 ~ 7 centimeters is suitable, the soil moisture good easy shallow, soil moisture difference easy deep. Sowing to check the quality of sowing, such as sowing depth is not consistent, sowing to dry soil layer or broken bar phenomenon to timely communication with the tractor, timely correction. After sowing, it should be suppressed in time. Density should be strictly in accordance with the requirements of the density of varieties to sow, to select a good sowing effect and a higher level of operation of the planter and the hand to sow.

Fertilize

The fertilization method of maize should be applied flexibly according to the climate condition, planting density, soil fertility level, type and quantity of fertilizer. Base fertilizer should be applied adequately, seed fertilizer should be right amount. Generally speaking, phosphate fertilizer, potash fertilizer can be used as a one-time bottom fertilizer. Nitrogen fertilizer should be applied in stages, 30% at the bottom and 70% at the top. It is suggested that the bottom fertilizer should be applied with subsoiler, and should be turned back into the soil if applied on the surface. Topdressing is generally applied by furrow or hole. Depth of more than 5 cm, about 10 cm from the seedlings, do not burn seedlings.

Pest Control

The main underground pests were needle beetle, mole cricket, GRUB and small Cutworm, which had great influence on the yield of maize. Before sowing corn, each mu with 50% phoxim emulsion 0.25 l, mixed with fine soil 25 ~ 30 kg, made toxic soil, evenly spread on the ground, and then ploughed into the soil. You can also buy seed dressings that contain insect repellent seeds. Maize seedling diseases are mainly damping-off caused by pythium and Fusarium Moniliforme, seedling blight and root rot. For the control of damping-off, 10% haloxyfop or 5% Genbao 50-100 ML mixed seed 50 kg can be used It can be sprayed with 500 ~ 800 times solution of 72.2% PROPECIA water, 500 times solution of 58% redomia manganese zinc wettable powder or 600 times solution of 72% KELU wettable powder.