The nutrient uptake of corn per 100kg of corn kernels is absorbed by the soil, climate (rain, temperature, light) varieties, yield and other factors. As the increase in production has decreased, the exception is nitrogen. Experiments show that the ratio of N, P, and K absorbed by corn (N: P2O5: K2O) averages 1:0.48:0.79.
Physiological characteristics of corn required for fertilizer
During the growth and development of corn, it is necessary to continuously absorb various nutrients from the soil and synthesize organic substances that supply growth and development. During the whole growth period, the most nutrient elements absorbed by corn are N, P, K, S, Ca, and Mg. The nutrients absorbed in corn's lifetime are N most, K is less, and P is less. Since most of the elements in the soil can meet the needs of corn growth, the fertilization in production is mainly the application of N, P and K fertilizers.
The absorption of N, P and K in the whole growth period of maize is basically a trend of "less-more-less". That is, the seedling stage grows slowly, the plant is small, and the nutrient absorption is small; from the jointing to the flowering stage, the growth is rapid, and the nutrient is absorbed; in the late growth stage, the growth is slowed down and the nutrient absorption is small.
According to the research of Shandong Academy of Agricultural Sciences, the period from jointing to tasseling is the peak period of corn nutrient. At this stage, although the dry matter accumulation is only about 1/3, the cumulative absorption of N element accounts for 50% of the total growth period. P accounted for 48% and K accounted for 71%. During this period of growth, both vegetative and reproductive growth, the nutrient supply during this period, is extremely important for corn production.
China's corn planting is extremely extensive. Due to regional, climatic, soil conditions, water conditions, and sputum, there are significant differences among different regions. Therefore, the fertilization methods and fertilization techniques are different in different regions, and their respective fertilization modes are formed. .
Corn fertilization technology
1. Fertilization principle The principle of fertilization of corn should be: base fertilizer should be applied as much as possible, organic fertilizer and chemical fertilizer should be matched; N, P, K fertilizer and trace elements should be combined; base fertilizer, seed fertilizer and top dressing should be combined to make various fertilizers Balanced supply, only the balance of various nutrients, can play the benefits of each nutrient.
2. Fertilization method
(1) base fertilizer
The base fertilizer is extremely important for the growth and development of corn. The direct effect is beneficial to the robust growth of the early growth stage, and in fact has an important impact on the whole life of the corn, especially the nutrient supply of P and K in the corn. Therefore, in the general area, the nitrogen fertilizer in the base fertilizer can account for more than 50% of the total fertilization amount, and the P and K fertilizers are basically 100% applied as the base fertilizer.
In the northeast spring corn area, because of the sowing in the dry land without irrigation conditions, the corn often has a bad soil and cannot be traced when it needs to be topdressed. Therefore, in the northeast corn area, it is now generally applied once in the form of base fertilizer and topdressing.
In the summer maize area of ​​the Huang-Huai-Hai Plain, after the wheat harvest, the cultivated land is generally not used, and the corn-based fertilizer can not be applied. This often results in insufficient supply of phosphorus in corn, which affects the increase in production. After the test, the phosphate fertilizer can be appropriately added in the previous season wheat.
(2) Top dressing
Considering the requirements of corn for fertilizer, corn should be applied three times with top dressing, namely joint fertilizer, ear fertilizer and grain fertilizer. Corn topdressing is generally applied with chemical nitrogen fertilizer, mainly urea and ammonium bicarbonate. Topdressing should be done in deep application. In dry land, whether it is good or bad, it is necessary to use acupoints or strips.
Ever wonder if you could turn your car's interior into a full-on light show? Well, that's now possible because many modern vehicles offer cool ambient lighting, even on non-luxury cars. Keep reading to find out what ambient lighting is, as well as what cars have the best ambient lighting systems.
What Is Car Fiber optic Lighting? The feature utilizes interior lights mounted around the cabin to enhance the design and maybe even soothing driver and passenger. In addition to the foot wells, some ambient lighting systems often illuminate the door and dash trim, cupholders, climate control vents, and speaker surrounds.
Car Fiber Optic Lighting,Fiber Optic Lights Car,Fiber Optic Car Lighting,Fiber Optics In Cars
Jiangxi Daishing POF Co.,Ltd , https://www.jxopticfibrelight.com