How to manage the planting of summer corn in the middle and later period?

How to manage the planting of summer corn in the middle and later period? Please introduce the management method of planting summer corn in the middle and later stage, you can refer to the following methods for management: first, skillfully use water and fertilizer to promote to the end. The growth period of summer corn is short, and the demand for water and fertilizer is concentrated, which should be promoted to the end. 1. Early irrigation to save water, early application of fertilizer. At the jointing stage, the growth characteristics of summer maize are mainly vegetative growth, long leaves above ground, underground roots, large demand for nutrients and tight fertilization time, so it is necessary to break stubble, water, fertilize and promote the early development of seedlings before jointing. Generally fertile plots apply 1500kg to 2500kg per mu of rotten organic fertilizer, and it is better to apply formula fertilizer, 20kg urea, 40kg calcium superphosphate and 10kg potassium sulfate per mu. The method of fertilization is hole application or strip application, and the unscientific fertilization methods of spreading, clear application and water application are prohibited. 2. Fully irrigate and pump male water, and fill well with pulping water. About half a month before heading, it is the differentiation period of female florets, at this time, if there is drought, it should be fully irrigated artificially to prevent neck drought; irrigation in the rising grain stage is also very important, at this time, if the soil moisture is not good, the weather is dry, it is easy to sun flowers and greatly reduce yield. 3. Topdressing full booting fertilizer (11 leaves) is suitable for attacking grain fertilizer. Booting fertilizer generally accounts for 10%-15% (10-12 kg / mu) of fertilizer application, which is in the period of vegetative growth and reproductive growth, so it is also a key topdressing period for corn. For some late-maturing varieties or the land with sandy soil quality, the phenomenon of de-fertilizing occurs before and after heading, and the tapping fertilizer should not be applied too much, and should be applied early at the same time. Second, prevent lodging and reducing production. In the near future, due to more rainfall and strong winds in summer, it is particularly important to prevent the lodging of corn in the middle and later stages. Generally speaking, close attention should be paid to the local weather forecast before irrigation, and irrigation should be prohibited when strong winds and torrential rains come. After the rain and wind have stopped, water will be irrigated. In case of lodging, it should be straightened in time. Third, artificial castration to assist pollination. The combination of castration and artificial pollination has a more significant effect on increasing yield. The method of castration is carried out when the male ear is just out and has not yet flowered. Generally, one row of male ear can be removed by interlacing or two rows, or the male ear can be removed from another plant. Castration should be carried out in fields with neat growth, higher density and less insect pests. Fourth, timely prevention and control of diseases and insect pests. In recent years, the disease and pest damage of summer corn is more serious in the middle and later stage, especially Zhengdan 958, Jundan 20 and other varieties, aphid harm is very common, so it is necessary to prepare in advance and organize forces to control it in time. Commonly used drugs: 40% omethoate 1000 times liquid spray control; 25% imidacloprid 4g / mu spray control. Spraying can be combined with foliar fertilizer spraying at one time. Click to get more corn planting techniques click to get more food crop planting techniques