In order to improve the corn protein content, many studies have been conducted at home and abroad. In the early 60s of the last century, a type of jade called Opaque-2 was found abroad.
In meters, the content of lysine and tryptophan in the protein is twice as high as that of normal corn, which has significantly improved the nutritional quality of corn protein. So will be rich in eggs
The special corn type of lysine and tryptophan in the white matter component is called high quality protein corn.
The content of lysine and tryptophan in the whole grain of high-quality protein corn is about 80% higher than that of normal corn. Preliminary studies have shown that this kind of corn can be used in feed for livestock and poultry.
Significantly improve animal production performance, increase feed conversion efficiency, save food, and increase farmers' income.
1. Physiological characteristics of high quality protein corn
1.1 Quality Protein Maize Quality High Quality Protein Maize contains 80%~100% of essential amino acids, lysine and tryptophan, higher than normal corn, per 100g of egg.
The white matter contains lysine 4~5g and arginine content is 30%~50% higher, and the free amino acid content is higher than normal corn, even in some genetic backgrounds.
It can be 3 to 5 times higher.
1.2 The characteristics of the grouting process Plant physiology studies have shown that: Normal corn growth and development is normal, starch content in the grain accounted for 68%. To improve the egg
White matter content, total nitrogen content, lysine and tryptophan content, reducing the proportion of gliadin, will affect the normal growth of late growth, even early
Injecting grouting stopped the formation of starch, while protein corn was different. The increase in protein content had no effect on the growth of corn in the later period.
1.3 Grain traits The high-quality protein corn that was tested and planted in China in the previous phase was replaced by the high-quality protein corn introduced in the Mexican Maize and Wheat Improvement Center.
Outside the QPM, other grains are silty (also called soft), low density, opaque, and matte. High quality eggs in grain traits
There is a clear difference between white corn and normal corn.
2. Technical requirements for cultivation of high-quality protein corn
According to the characteristics of high-quality protein corn, in addition to the general high-yielding cultivation techniques, in order to increase yield and ensure quality,
Refocus on the following tasks:
2.1 Separation from Normal Maize The cultivation of high-quality protein maize is induced by recessive single genes. If it receives normal maize pollen, its lysine content will be
It becomes the same as normal corn, so the production is always a plot of high-quality protein corn. It should be separated from ordinary corn to prevent string of powder. This is to ensure high quality.
The key measure of protein corn quality.
2.2 Grasping all seedlings, high-quality protein maize seeds soft and weaker than ordinary corn, so seeds should be selected before sowing to remove crushing particles
, small grain. In order to ensure full seedlings, strong seedlings, and conservation of seed use, the use of seedlings for transplanting seedlings is advocated in some regions.
Increasing Honda's accumulated temperature will help nurture strong seedlings, increase lodging resistance and increase corn production.
2.3 Proper planting density should be determined according to soil, fertilizer, water conditions, species characteristics and field management level. The principle is: soil fertilizer and water conditions
Poor plots should be sparsely planted; plots with good soil and fertilizer conditions and nursery transplanted plots can be properly planted.
3. Field management technology for high quality protein corn
The central task of high-quality protein corn field management is to catch seedlings and attack headings, prevent water shortages and defertilization, and fight for large grains and spikes.
3.1 timely topdressing, re-appropriate early panicle fertilizer production of more than 6000kg per ha need to apply more than 187.5kg of pure nitrogen, and should pay attention to the application of phosphorus, potassium fertilizer. top dressing
In terms of stage IV application of seedling fertilizer, jointing fertilizer, panicle fertilizer and grain fertilizer, the key is to reapply early-stage attacking panicle fertilizer and increase grain fertilizer.
3.2 The middle cultivator soil should be cultivated in the middle of the seedling stage. The Chinese agricultural network has good soil permeability, heat preservation, and soil conservation. Eradicate weeds so as to cultivate strong seedlings.
Jointing should be combined with top-dressing for deep cultivators and shallow soils. The general plough depth is 6~8cm, which can promote the occurrence of new roots and develop in depth.
3.3 timely control of pests and diseases should pay attention to prevention and control of soil silkworm, do not lack nests. As soon as the occurrence of bullying at the jointing stage, he will be controlled and controlled by Chu Danuo to control its succession.
Continued damage. During the big bell mouth period, carbofuran was used to control corn borer. At the same time, it is necessary to strengthen field management and discharge water in the field in time to create favorable conditions for disease prevention.
.
4. Solarization and Storage
When the high-quality protein corn matures, the water content of the grain of the ear is slightly higher than that of the common corn, and the sun must be collected in time to prevent the mildew. Should choose sunny harvest, close after
Continue drying for 2 to 3 days. After the ear is dried, it can be threshed, then threshed and then dried for 1 to 2 days. When the moisture drops below 12%, it can be stored in storage. It should also be checked frequently.
Turn over the sun. In places where conditions permit, fumigation can be performed before storage to prevent pests in the warehouse.
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