Summer corn dressing technology
Summer maize is intercropped and harvested in wheat fields. Basal fertilizers are generally not used and the amount of seed fertilizers is insufficient. Therefore, it is very important to apply fertilizer properly.
First, choose the corresponding fertilizer application plan
To form a certain amount of corn, it is necessary to absorb the corresponding nutrients from the soil and fertilizer. The higher the yield, the more fertilizer is needed. It is necessary to select a suitable fertilizer application program according to the yield level and soil conditions. There are 3 kinds of top dressing options available. High-yielding fields have good ground and a large number of topdressing fertilizers. It is best to use the method of chasing seedlings, harvesting panicles, and replenishing grain fertilizers in light weight: 30% of the total fertilizer, 50% of panicle fertilizer, and grain fertilizer. About 20%. In middle-grade fields, the fertility foundation is good, and the amount of topdressing is relatively large. It is advisable to use the second-attack fertilization method of applying sufficient seedlings and harvesting panicle fertilizers: Miaofei account for about 40%, and ear fertilizer accounts for about 60%. In low-yielding fields, where the foundation of the soil is poor and the amount of topdressing is small, the top-dressing method of reseeding Miaofei and lightly harvesting panicle fertilizer should be adopted: Miaofei account for about 60%, and panicle fertilizer accounts for about 40%.
Second, put a good top dressing time
According to the requirement of fertilizer for a lifetime of corn, top dressing in the best fertilization period will give full play to fertilizer efficiency, and it will play a role in increasing production and income.
(1) Miao Miao Miao Fei has the effects of promoting roots, strong seedlings, and promoting leaves and strong stalks, laying the ground for high yields and laying the foundation for the panicles. In addition to the application of quick-acting nitrogen fertilizers, Miaofei may also be applied with both P and K fertilizers, and may also be applied to decomposed organic fertilizers.
(2) The large bell-mouth stage of panicle-fat corn is in vegetative and reproductive growth stages, and is growing vigorously, requiring a large amount of fertilizer. At this time, fertilization can not only meet the requirements of spike differentiation on nutrients, but also increase the photosynthesis rate of the upper middle leaves, make more nutrients transported into the ears, and promote grain and grain weight.
(3)Grain fertilizer corn is drawn to flowering stage and transferred to reproductive growth. Application of granule fertilizer can extend the functional period of green leaves, increase the efficiency of photosynthesis, increase the accumulation of photosynthetic products, and promote graininess and grain weight.
In addition, the spraying of phosphate fertilizer on the foliar stage of corn growth has a significant effect on promoting the transport of nutrients to the grain and increasing grain weight. Usually 0.4% - 0.5% potassium dihydrogen phosphate aqueous solution or 3% - 4% of superphosphate calcium leaching solution, sprayed on the stems and leaves with 75--100 kg per acre, the effect is significant.
Third, master the fertilizer concentration and site
Appropriate fertilization concentration and parts can fully exert the fertilizer effect and reduce the loss of fertilizer, and play a role in economical and effective fertilization. With nitrogen fertilizer as top dressing, deep soiling must be applied in order to make full use of fertilizer efficiency and increase nitrogen fertilizer utilization rate. It is advisable to apply about 10 cm of deep nitrogen fertilizer. The seedlings are applied at a distance of 10-12 cm from the plants, and the panicle fertilizer is applied at a distance of 15--20 cm from the plants, which is favorable for the absorption and utilization of the plants.
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