How to choose corn seeds correctly is something that many people are looking forward to. Today, I will share with you how to choose corn seeds correctly. First, let's look at a few questions:
1. What kind of corn should I choose?
Choose "insurance" and not "fresh". The so-called "insurance" species is to plant seeds that have been performing well for at least two years. The so-called "fresh" species is not planted in the local area, or planted with only one year of good performance. The climatic conditions in different years and different ecological regions are very different. The varieties that perform well in the first year do not necessarily perform well in the second year; the varieties that perform well in one ecological region do not necessarily perform well in other ecological regions.
2. There is a resistance to resistance when selecting a variety. What is resistance?
Seed selection should pay attention to the resistance of the variety. The stress resistance mainly refers to the disease resistance, lodging resistance, drought resistance, insect resistance, cold resistance, etc. of the variety, which is simply a variety that suffers little or no damage under the condition that other varieties are harmed under the same conditions. The variety is generally stable in production.
3. What are the criteria for qualified corn seeds?
China's indicators for measuring seed quality mainly include variety purity, seed clarity, germination rate and moisture. The state has clearly defined the purity, purity, germination rate and moisture index of corn seeds. The purity of the first-class seeds is not less than 98%, the clarity is not less than 98%, and the germination rate is not less than 85%. The content is not higher than 13%; the purity of the secondary seed is not less than 96%, the clarity is not less than 98%, the germination rate is not less than 85%, and the moisture content is not higher than 13%.
After reading the above three questions, after reading the following crop science corn plant protection experts from the characteristics, seeding methods, purity, germination rate, dry humidity, climate, document specifications, etc., give you a detailed explanation:
1. Select the “three certificates†and “one photo†complete units to purchase seeds. It is recommended that when you buy corn seeds, you should first check whether the sales unit has “three certificates and one photoâ€. Generally speaking, the quality of the seeds sold by the “three certificates and one photo†unit is reliable. The so-called "three certificates and one photo" refers to the "production license", "seed certificate", "seed management license" issued by the seed department, and the "business license" issued by the industrial and commercial administration department. When you take photos, you have to pay attention to the time of issuance of the certificate, whether the legal representative is consistent or not.
2. Select the varieties that have been approved by the seed management station. All the varieties that have been approved are subjected to regional experiments organized by the seed management department to observe the adaptability, yield, stress resistance, growth period and quality of the tested varieties, and then systematically analyze according to the characteristics of the climate. Analyze and put forward opinions, ask peer experts to conduct a review one by one, adopt formal approval through majority approval, and then propose for production promotion and application. Therefore, when purchasing seeds, everyone first looks at whether the distribution seed unit has a certificate of certification or an official document, otherwise it is not easy to buy.
3. Select the characteristics of the variety and the planting technology must be compatible. When planting, it depends on the planting density of the variety. The suitable planting density is 4000-4500 plants/mu. The planting density is chosen instead of more or less. If the variety is not resistant, the planting position is On the tuyere, you should choose a resistant variety; if the variety is not resistant to aphids, and the location of the species is a year old aphids, look for anti-aphids. That is to say, the characteristics should be matched with the chosen one.
4. Select the variety and seeding method to be consistent. There is a big difference between seed varieties in growth period, yield level, disease resistance, drought tolerance, lodging resistance and adaptation area. Moine varieties are improperly selected, resulting in reduced yield or even absolute production; for example, intercropping in wheat The selected varieties have to grow longer, and the early-maturing varieties are selected after the wheat harvest. The selection of seeds must be based on the growing habits of crop varieties.
5. Purity: The difference in seed size, color, grain shape and grain shape is small, and it is very similar. Most of these seeds are of high purity. Take 100 seeds randomly, the difference in size, color, grain shape and grain shape is eight or two, indicating that the hybrid rate of this seed is more than 20%. This seed is generally not to be bought. Most of the varieties, which are different from the colors, grain shapes and grain shapes that you know, are likely to be false or inferior.
6, germination rate: mainly depends on whether the seeds in the preservation process in the case of mildew, rot, insects, darkening of the color, etc., open the seed pack has a sour musty taste, indicating that the child has deteriorated, the germination rate is not too high Don't buy it easily. In the production of Daejeon, the germination rate of seeds is less than 85%. Most of them cannot be used, or the amount of seeding is increased.
7, dry humidity: Where the seeds are wet, there may be mildew and deterioration. When buying seeds, you can first put your hands into the seed bag and judge the dryness of the seeds according to the sense of directness. Any odorless and crisp feeling is relatively dry; on the contrary, there is a feeling of sullen and damp and the taste is not correct, indicating that the seeds are damp. In addition, you can grab some seeds and put them in your hands for a few times. The sound that is crisp and squeaky is dry, and vice versa.
8, according to the previous planting selection. The increase in yield and income of variety corn is directly related to the planting of the previous plant. If the soybean is planted in the former hoe, the soil fertility is better, and high-yield varieties should be selected. If the sorghum is planted with corn and grows well and has high yield, the variety can be further selected; if the glutinous corn is infected with a certain disease, Seeds that are susceptible to this disease should be avoided when selecting seeds. In addition, the same variety cannot be continuously planted in the same plot for three or four years, otherwise there will be land infertility and variety degradation.
9. Select seeds according to local precipitation and accumulated temperature. According to experience, the amount of snowfall in the winter is small, and the winter is not cold. In the second year, there will be more rainfall in the summer, the accumulated temperature will not be high, and the varieties with too long growing season will have insufficient accumulated temperature and affect maturity. On the contrary, the amount of snowfall in the winter was very high in the winter, and the winter was very cold. In the summer of the next year, the rainfall was generally less, the accumulated temperature was higher, and the varieties with strong drought resistance were easy to choose.
Finally, remind everyone that you should ask for an invoice in time after purchasing the species and keep it in a safe place. The invoice is a voucher for seed sale. If the seed user suffers losses due to seed quality problems, the seed operator should compensate. The amount of compensation includes the purchase price, related expenses and loss of available benefits. Therefore, you must ask for invoices or other evidence when buying seeds, so that once the quality of the purchased seeds has problems, you can make a claim.
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