From May 25th, we conducted field investigations on 11 science and technology demonstration households and 32 corn farms of 25 households in Xinglong Village and Xiaoyingcheng Village in Yitong Town. It shows that the average emergence rate of seedlings this year has reached about 85%. We found that in the plot investigations by farmers such as Li Wei, Chen Dapeng, and Chen Wenbin in Xiaoyingchengzi Village technology demonstration farms, the best plot emergence rate was over 90%, averaging about 85%, and individual plots below 80%. About 5% of the three types of seedlings are shown, and about 3% of them are unemerged. Some plots of the ground pests, herbicide poisoning, and seed coating pesticides have occurred. In the past three years, we have made statistics on the emergence of Xinglong Village and Xiaoyingcheng Village in Yitong Town. In summary of the three-year seedlings, the emergence time is generally around May 18, and the seeds are usually in the soil for about twenty days.
We believe that the reasons for this happening are as follows:
1. Seed sowing results in a lower rate of emergence: Because any seed, the purity, cleanliness, and emergence rate cannot be 100%, which means that single seeding may be at least 5% of seedlings.
2. Herbicide poisoning: In recent years, due to the interests of agricultural resources dealers, when farmers buy pesticides, many farmers use atrazine hectare less than 3 kg and acetochlor already use more than 5 kg, acetochlor in corn Excessive use of buds, especially in low temperatures and rainy seasons, is even more serious.
3, sowing time is relatively premature: over the years the farmers in the sowing time, has been early in the early thought that sowing can be harvested early, once encountered in the spring is low, the phenomenon of late spring, powder is inevitable.
4. Fertilizer is too shallow to cause burning of seedlings: Some farmers have no application of oral fertilizer, and they do not dig trenches and eliminate stubble after fertilization. The misunderstanding lies in the fact that deep fertilization seedlings are not good.
5, low temperature and rainy spring.
According to the production situation in the past three years, spring production proposals are now proposed:
1, the seeds must be carefully selected, classified sowing, the proposed form 1; 2; 1 sowing;
2. According to the temperature changes in recent years, the sowing time in the central area of ​​our county is controlled around May 1.
3, herbicide should not be used excessively, as long as possible to control the spraying time within seven days after sowing;
4, choose high-quality seed coating agent selection. Http://
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