Double Servo Pipe Cutting Machine The double servo Pipe Cutting Machine is adopted. The accuracy of the length of the pipe cutting is guaranteed to be within ± 0.05mm (the error is mainly generated on the steel pipe and tool), and the cut luster is free of rough edge. Double Servo, Seamless Pipe, PVC Pipe, PEX Pipe Shaoxing Sunfong Intelligent Equipment Inc. , https://www.zjsxsunfong.com
1. Yield level and fertilizer requirement: With the increase of yield level, the N, P2O5 and K2O absorption per hectare of corn also increased, while the amount of N, P2O5 and K2O required to form 100 kg of grain decreased. The fertilizer utilization rate is improved under high-yield conditions. Therefore, when determining the N, P2O5, and K2O requirements, the difference in production levels should be considered. The nutrient requirement of the target yield can be calculated from the product of the target yield and the nutrient requirement of 100 kg of grain. The N, P2O5, and K2O requirements of a target yield level should be calculated from the corresponding regression equation.
2. Variety characteristics and fertilizer requirements: The mineral elements required for different corn varieties vary greatly. The N, P2O5 and K2O uptake per hectare of corn is generally higher than that of the varieties with long growth period and shorter growth period. The growth period is similar to that of high stalk varieties higher than that of medium stalks and dwarf stalks.
The plant type characteristics of the varieties also have an effect on the absorption of mineral elements. The absorption of mineral elements in compact corn varieties is higher than that in flat varieties.
The difference in the amount of fertilizer required between varieties is related to the plant type characteristics, length of growth period, density tolerance and fertility resistance. Therefore, for those varieties with longer growth period, taller plants and suitable for close planting, appropriate Increase the amount of fertilizer applied.
3. Soil fertility and fertilizer requirement: The absorption of mineral elements by maize is affected to some extent by soil fertility. In soils with higher fertility, there are more available nutrients for plant absorption. Therefore, the absorption of N, P2O5 and K2O by the plants is higher than that of the low-fertility soil, while the amount of N, P2O5 and K2O required to form 100 kg of seeds is reduced.
4. Fertilization and fertilizer requirement: The level of fertilization affects the overall supply of nutrients in the soil, which in turn affects the absorption of mineral elements by corn plants. The application of nitrogen, phosphorus and potassium fertilizers alone and in combination with each other can promote the absorption of N, P2O5 and K2O by corn plants, and the yield level will also increase, but the increase of plant fertilizer demand greatly exceeds the increase of yield, so The content of N, P2O5 and K2O required to form 100 kg of grain increased with the increase of fertilizer application rate. It shows that the fertilizer nutrient utilization rate is reduced when the fertilizer input is large.
5. Meteorological factors and fertilizer demand: The fertilizer demand of corn varies greatly from year to year. This change is mainly the result of the comprehensive effects of various meteorological factors during the year. The change of meteorological factors during the growth of corn is mainly through the growth and development to affect the amount of fertilizer needed. There is a certain difference in the sensitivity of the production capacity between varieties to meteorological factors. (Source: China Fertilizer Network)
Total 1 | <First <Prev 1 Next> Last> |
share to: