Affected by traditional farming methods and living habits, many farmers have abandoned or even incinerated large amounts of straw after harvesting crops, causing both waste and environmental pollution. If the arable land per mu is 200 kg, it can reduce the application of about 20% of phosphate and potassium fertilizer, that is, about 2 kg of potassium chloride and 5 kg of superphosphate can be used per mu of cultivated land, which can save farmers about 15 yuan per mu. Fertilizer input. However, it should be noted that straw returning to the field does not effectively increase nitrogen fertilizer, and the amount of urea should be adjusted at an appropriate time.
The safflower is rich in nitrogen, phosphorus and potassium nutrients. It was used as a green manure in many places before the fertilizer was applied in large quantities. The study found that the nitrogen, phosphorus and potassium contents of safflower were 0.48%, 0.11% and 0.24%, respectively. That is to say, if 500 kg of safflower was applied per mu of cultivated land, about 5 kg of urea and 5 kg of superphosphate could be reduced. And 2 kg of potassium chloride can save farmers about 25 yuan of fertilizer input per mu. At the same time, the method of planting safflower is simple. After sowing the seeds, “I don’t careâ€, the yield per mu is also about 1500 kg, and the soil structure can be improved. Guo Xisheng reminded that it is appropriate to apply about 500 kilograms per mu of cultivated land, and it is not possible to achieve the best fattening effect with more or less use.
In addition, the application of farmyard manure can also help farmers reduce fertilizer application and save costs. However, the accumulation and application methods of farmyard manure are not correct, which will result in the serious loss of nutrients and the effect of effective fertilization. When the farmer's fertilizer is accumulated, it should be sealed to prevent nutrient volatilization and leakage, and the manure should be decomposed to increase the release rate of nutrients and kill various parasites, germs and weed seeds; farmyard manure should generally be used as base fertilizer. Deeply applied to the soil, can not be stored and applied with alkaline fertilizers such as grass ash.
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