Continuous cropping obstacle regulation and control agent for corn field and preparation method thereof

Abstract

The invention relates to the technical field of agricultural fertilizers and particularly relates to a regulation and control agent for overcoming continuous cropping obstacles of a corn field. The regulation and control agent comprises the following raw materials in parts by weight: 39-42 parts of copper acetate, 26-28 parts of special fertilizer, 19-21 parts of thiophanate methyl, 5-6 parts of streptomycin sulfate, 3-5 parts of rooting powder and 1-2 parts of cytokinin, wherein the special fertilizer comprises the following raw materials in parts by weight: 40-44 parts of urea, 30-32 parts of monoammonium phosphate, 16-18 parts of potassium sulfate, 2-3 parts of zinc sulfate, 1-2 parts of ammonium molybdate, 0.3-0.5 part of boric acid and 0.3-0.5 part of industrial citric acid. The invention further relates to a preparation method of the regulation and control agent. According to the regulation and control agent disclosed by the invention, the difficult problems of long continuous cropping year limit of the corn field for seeds, nutritional imbalance, serious soil-borne diseases, decline in quality and yield of corns for seeds and the like are overcome.

Description

technical field [0001] The invention relates to the technical field of agricultural chemical fertilizers, in particular to a regulating agent for overcoming continuous cropping obstacles in corn fields. The present invention also relates to the preparation method of the above regulator. Background technique [0002] Gansu Hexi Corridor has vast land, rich light and heat resources, large temperature difference between day and night, and good natural isolation conditions. It is an oasis irrigated agricultural area and an advantageous area for domestic seed and grain production. Seed production area of ​​80,000 to 100,000 hm 2 The annual output of hybrid corn seeds is more than 400-500 million kilograms, accounting for more than 50% of the national corn seed production. Corn seed production has become the leading industry to promote local economic development and increase farmers' income. The healthy and sustainable development of the seed production base is crucial to the sta...

AI Technical Summary

Problems solved by technology

In addition, long-term continuous cropping increases the number of pathogenic microorganisms, enriches harmful organisms, aggravates soil-borne diseases in farmland, imbalances in plant nutrition, and reduces crop resistance.

[0004] 2. The amount of organic fertilizer input is insufficient, and the organic matter in the corn production field is declining. After 15 years of continuous planting and production of corn, the soil organic matter content is 23.61 g / kg. Compared with the 2-year planting period, the soil organic matter has decreased by 4.23 g / kg. The amount of fertilizer input is insufficient. According to the survey, 85% of the peasant households in the field of corn farming have a total input of 456 kg / ha of pure nitrogen and phosphorus in chemical fertilizers, while the total input of pure nitrogen and phosphorus in organic fertilizers is 68.40 kg / ha. The ratio of the total input of pure nitrogen and phosphorus to organic fertilizers is 1:0.15. The increase of corn yield mainly depends on the application of chemical fertilizers. Long-term and large-scale application of chemical fertilizers will increase corn yields, but eventually the soil organic matter content will decrease.

The utilization rate of phosphorus fertilizer for 15 years of corn planting is 18%. Compared with 2 years of planting, the utilization rate of phosphorus fertilizer has dropped by 4.5%. The cost of phosphate fertilizer for 15 years of corn planting is 2,400 yuan / hectare. hectare

[0006] 4. The raw materials and proportions of compound fertilizers circulating in the market do not conform to the nutrient status of corn farming in this area, and there is a lack of multifunctional special fertilizer for seed corn production, which leads to the imbalance of soil nutrients

Second, for a long time, farmers have only paid attention to the application of nitrogen and phosphorus fertilizers, and have no habit of applying potassium fertilizers.

Third, the amount of organic fertilizer application is insufficient

The first reason is that for a long time farmers have only paid attention to the application of nitrogen and phosphorus fertilizers, and have no habit of applying trace elements. The second is that the amount of organic fertilizer input is seriously insufficient

[0007] 5. The planting area is large, the continuous cropping period is long, there are many kinds of foreign varieties, and the seeds are infected with bacteria, which leads to the prevalence and spread of diseases, and reduces the yield and quality of seed production corn

[0008] 6. The planting area is large, the continuous cropping period is long, and the problem of soil compaction is more prominent

[0009] 7. Lag in research and demonstration of high-quality, high-efficiency and safe production technology integration of seed production maize