How to choose efficient corn seeds? Dealers and farmers must see it.

If we continue to plant corn in 2017, we need to pay attention to the selection of high-yield corn seeds to increase yield, to improve corn yield is to choose good corn seeds. Recently, many media have revealed the news about peddling fake seeds. Let's analyze how to choose efficient corn seeds.

Let's first look at a few questions:

1. What kind of corn should be chosen?

Choose "insurance", not "fresh". The so-called "insurance" species is to plant seeds that have performed well locally for at least two years. The so-called "fresh" species are varieties that have not been planted locally or that have performed well for only one year. The climatic conditions of different years and different ecological regions are very different, the varieties that perform well in the first year may not necessarily perform well in the second year, and the varieties that perform well in one ecological region may not necessarily perform well in other ecological regions.

2. If there is a resistance in the selection of varieties, what is stress resistance?

In seed selection, attention should be paid to the resistance of varieties. Stress resistance mainly refers to disease resistance, lodging resistance, drought resistance, insect resistance, cold resistance and so on. To put it simply, it means that under the same conditions, other varieties suffer little or no damage, and this variety generally has good yield stability.

3. What are the criteria for qualified corn seeds?

The indexes to measure seed quality in China mainly include variety purity, seed purity, germination rate and moisture. The state has clearly stipulated the purity, purity, germination rate and moisture of corn seeds: the purity of primary seeds is not less than 98%, the purity of primary seeds is not less than 98%, the germination rate is not less than 85%, and the water content is not higher than 13%. The purity of secondary seeds is not less than 96%, the purity is not less than 98%, the germination rate is not less than 85%, and the water content is not higher than 13%.

After reading the above three questions, the following experts will give you a detailed account of the characteristics, sowing methods, purity, germination rate, humidity, climate, and certificate specifications.

1. Choose units with complete "three certificates" and "one photo" to buy seeds. It is suggested that when buying corn seeds, we should first look at whether the sales units have "three certificates and one photo". Generally speaking, the quality of the seeds sold by the units with "three certificates and one photo" is more reliable. The so-called "three certificates and one license" refers to the "production license", "seed qualification certificate", "seed management license" issued by the seed department and the "business license" issued by the administrative department for industry and commerce. When you look at the "three certificates and one license", we should also pay attention to the time of issuing the license, whether the legal representative is consistent, and so on.

2. select the varieties that have been approved by the seed management station. All the varieties examined and approved are regional tests organized by seed management departments to observe the adaptability, yield, stress resistance, growth period and quality of the tested varieties, and then make a systematic analysis according to the climatic characteristics. based on the analysis, put forward opinions, invite peer experts to evaluate one by one, formally approved by the majority, and then put forward for production promotion and application. Therefore, when purchasing seeds, we first look at the seed distributor to see if there is an introduction to the approval certificate or official document of the variety, otherwise do not buy it easily.

3. The selection of variety characteristics must be adapted to the planting technology. When selecting seeds, it depends on the planting density of the variety, and the suitable planting density is 4000-4500 plants / mu, and the planting density is chosen like this, not more or less; if this variety is not resistant to lodging, and the location of the species is on the tuyere, you should choose a lodging-resistant variety; if this variety is not resistant to aphids, and the location of the species is aphids every year, look for aphids-resistant ones. That is to say, the characteristic should be right with the chosen path.

4. The selection of varieties and sowing methods should be the same. There are great differences among seed varieties in growth period, yield level, disease resistance, drought resistance, lodging resistance and adaptive regions. for example, the interplanting varieties in the wheat line should have a longer growth period, and the early-maturing varieties should be sown mechanically after wheat harvest. To choose seeds, you must choose the growth period of crop varieties according to planting habits.

5. Purity: the difference of seed size, color, grain shape and grain shape is small, and it is very similar, and most of these seeds have high purity. Take 100 seeds at random, the difference in size, color, grain shape and grain shape is up to eight or two, indicating that the mixing rate of this seed is more than 20%. Generally, do not buy this seed. If most of the seeds are different from the inherent color, grain shape and grain shape of the varieties you know, there is a good chance that the seed is fake or inferior.

6. Germination rate: it mainly depends on whether the seeds become moldy, rotten, worm-eaten, and the color darkens in the process of preservation. Opening the seed bag has a sour and moldy taste, indicating that the seed has gone bad, and the germination rate will not be too high. Don't buy it easily. In field production, the seed germination rate is less than 85%, most of them can not be used, or increase the sowing rate.

7. Dry humidity: where the seeds are wet, they may become moldy and deteriorate. When buying seeds, you can first store your hands in the seed bag and judge the dry humidity of the seeds according to the direct feeling. Any tasteless and crisp feeling is relatively dry; on the contrary, there is a gloomy and damp feeling and incorrect taste, indicating that the seeds are moist. In addition, you can grab some seeds and rub them in your hands to make a crisp and rustling sound that is dry, otherwise it is wet.

8. Seed selection according to previous planting. The increase of yield and income of maize varieties is directly related to the previous planting. If soybean is planted in the previous crop, the soil fertility is better, and high-yield varieties should be selected; if corn is planted in the previous crop with good growth and high yield, this variety can continue to be selected; if the previous corn is infected with a certain disease, the varieties prone to this disease should be avoided in seed selection. In addition, the same variety can not be planted in the same plot for three or four years, otherwise the land will be barren and the varieties will be degraded.

9. Seed selection according to local precipitation and accumulated temperature. According to experience, the amount of snow in winter last year is small, the winter is not cold, the next summer rainfall will be more, the accumulated temperature will not be high, the growing period is too long, the accumulated temperature is not enough, affecting maturity. On the contrary, there is a large amount of snow in last winter, very cold in winter, less rainfall in the following summer and high accumulated temperature, so it is easy to choose varieties with strong drought resistance, and some mid-and late-maturing varieties can be planted in the depression.

Finally, I would like to remind you that you should ask for the invoice in time after choosing and buying the seed, and keep it properly. The invoice is the voucher for the sale of seeds, and if the seed user suffers losses due to seed quality problems, the seed operator shall make compensation. The amount of compensation includes the purchase price, related expenses and the loss of available benefits. Therefore, when buying seeds, be sure to ask for invoices or other evidence, so that if there is a quality problem with the purchased seeds, you can make a claim.