With the end of the wheat harvest, most areas began to enter the summer crop planting period. Summer maize planting area accounts for a large proportion of the summer crop planting area in Shandong. In Shandong, most of the summer corn is based on live wheat after harvest. Farmers are not used to basal fertilizer in the customary farming methods, but apply a small amount of fertilizer during sowing. Due to the fast growth and development of summer maize, and the short growing period, many farmers have unreasonable fertilization, which leads to an unbalanced input and output, and also affects the yield and quality of summer corn. Therefore, using scientific and reasonable methods of fertilization is an important factor to improve the high yield of summer maize. Rollators Walkers,Adult Rollators,Lightweight Rollator,Elderly Rollators Walkers Jiangyin Huashi Medical Equipment Co.,Ltd , https://www.medicalwellcare.com
The main misunderstanding of summer corn fertilization
1, the fertilizer used is not enough stamina, post-maize defertilization. The growth of corn was good in the early growth stage, but it appeared to be defertilized at a later stage. The performance of corn grain was less than the top, commonly known as "baldness" of corn. One of the reasons for this phenomenon was that the fertilizer used had a short fertilizer effect and lacked sufficient stamina.
2. Diazo light potassium fertilizer. Many farmers are accustomed to applying more nitrogenous fertilizers and phosphate fertilizers during fertilization. They believe that the corn growth period is short and must be promptly mobilized with nitrogen fertilizer. Therefore, during the entire growth period of summer corn, most of the available nitrogen fertilizers are dominant, resulting in the accumulation of nitrogen and phosphorus in the soil. It caused waste of nutrients and increased production costs. However, lack of potash fertilizer, poor ability to supply potassium to soil, and lack of trace elements in the soil led to the appearance of “weakness†in the later stages of the corn. The stalks were easy to fall down, seriously affecting the yield and quality of the corn.
3, fertilization is not scientific. Many farmers are accustomed to applying urea directly to the bottom of corn roots after raining in the summer, thinking that this would save time and allow corn to be absorbed directly. In fact, according to the results of the relevant experiments conducted by the agricultural sector, the utilization rate of nitrogen fertilizer in urea application is only about 55% of that of buried plants. That is, the fertilizer efficiency of spreading urea will be lost by about half, and it also leads to a large amount of urea melting directly with high temperature. Or wash away with rain.
Summer corn balanced fertilization technology
1. Take advantage of favorable fertilization opportunities. Summer maize generally begins jointing 25 days after sowing, and at the same time begins ear differentiation. 40-50 days after sowing, it enters the corn florets differentiation period. At this time, the amount of fertilizer required is the most, that is, the peak period of fertilizer is required, which is also the key period for determining the output. Farmers are often called the big bell mouth period. Therefore, 35-45 days after sowing of summer corn is the most favorable opportunity for top-dressing of summer maize, and we should seize the opportunity to top-dress as quickly as possible to meet the nutrients needed for the entire corn growth cycle.
2, grasp the fertilization time. According to the soil conditions, determine the specific fertilization time. The irrigated corn can absorb fertilizer quickly, and can select fertilizer 40-45 days after sowing. The high-yield irrigated land can be divided into two fertilizations. The first time it is applied 20-25 days after sowing. The application rate accounts for 30-40% of the total amount of fertilization. The second fertilization is conducted 40-45 days after sowing. Fertilizers in dry lands are slowly melting in the soil and can be topdressed 30-40 days after sowing. The available nitrogen fertilizer and ammonium bicarbonate can be top-dressed according to the situation. Urea must be applied 3-4 days in advance.
3, the appropriate amount of fertilizer and its ratio. Pay attention to balanced fertilization, not only to apply NPK, but also to supplement the trace elements to ensure high yield and quality of corn. Tests have shown that for every 100 kg of corn grain produced, the summer corn generally needs to absorb 1.25 kg of nitrogen, 0.58 kg of phosphorus, and 1.08 kg of potassium. To achieve a target output of 500-600 kg, 25-35 kg of urea, 40-50 kg of superphosphate, 10-20 kg of potassium chloride, 20 kg of urea, 400-500 kg of urea can be applied per mu. Calcium phosphate 40 kg, potassium chloride 6-8 kg; per mu yield of 300-350 kg of land can be applied to 15-20 kg of urea, 30 kg of superphosphate, 5-6 kg of potassium chloride.
4, pay attention to fertilization method. Regardless of urea, ammonium bicarbonate, compound fertilizer should be as far as possible using a hole or ditch, buried depth of 8-15 cm, not too close to the roots of corn to prevent burning seedlings. After urea is applied, it should not be watered immediately. It can be best watered after 3-4 days. Practice has proved that when applying fertilizer to corn, the amount of land can be saved by about 10 kilograms compared to surface application, saving about 20 yuan. (Hu Yuzhong)