What should be paid attention to in the ear stage of corn?

What should be paid attention to in the ear stage of corn? Please introduce that the ear stage of corn refers to the period from jointing stage to male ear flowering stage. Summer interplanting corn or summer direct seeding corn usually takes 25 Mel and 30 days. The vegetative growth and reproductive growth of maize at the ear stage are carried out at the same time, which is the most exuberant period. Maize likes temperature, and the suitable daily average temperature for growth and development at ear stage is 20 ℃-24 ℃. Higher temperature is beneficial to stem and leaf growth and male ear differentiation. The water requirement at the panicle stage is more, accounting for 1% of the total water consumption, and the suitable soil relative humidity is 70% and 80%. Before and after the heading of corn, there is a "critical period" of water, and soil drought will cause a large number of degeneration of florets, and in serious cases, it will cause "neck drought" and rare florescence, resulting in a substantial reduction in yield. Sufficient light conditions are required at the panicle stage, especially from the trumpet mouth stage to the heading stage, in order to facilitate the accumulation of dry matter, coordinate the nutrient balance in the body and promote the differentiation of spikelets and florets. In production, the main goal of panicle stage is to achieve more thick roots, stout stems, broad and thick leaves, thick green leaves, large spikes and many grains. The following management measures should be taken during the ear stage of maize: 1. At present, the temperature is on the high side and there is a lot of overcast and rainy weather, so we should pay attention to strengthen the management of fertilizer and water in the field; in the period of big trumpet mouth, topdressing panicle fertilizer should be applied, and the effect of increasing yield is significant, mainly quick-acting nitrogen fertilizer, and the fields with weak seedling condition and poor soil fertility can be fertilized in advance and increase the amount of topdressing. In the areas with more precipitation, the land flooded or flooded after rain should be drained in time so as not to affect the root growth. two。 In general, the ear stage is ploughed twice, deep ploughing once from jointing to small trumpet mouth stage to promote root development; after small trumpet mouth stage, shallow ploughing should be done to preserve roots and store soil moisture. In the big trumpet mouth stage, soil cultivation was carried out combined with topdressing to promote root growth. 3. After jointing, weak plants and tillers were removed in time to reduce fertilizer and water consumption and improve ventilation and light transmission conditions. 4. The main diseases and insect pests in maize ear stage are leaf spot, leaf spot, stem rot and corn borer, which should be controlled in time. Click to get more corn planting techniques click to get more food crop planting techniques