Nowadays, the corn harvest season is over, and the return of corn stalks has been gradually accepted by farmers' friends. However, some farmers have not mastered this technology comprehensively. Some problems have appeared in the application, and even negative effects have occurred. Some fields have wheat emergence. Low rate, yellow seedling, weak seedling and even dead seedlings. After analysis, the main reason is that the carbon-nitrogen ratio is out of balance, the straw is crushed too thick, the soil is too loose, and production should be prevented.
Anti-carbon to nitrogen ratio imbalance
The carbon to nitrogen ratio of corn stover is 65~85:1, and the ratio of carbon to nitrogen suitable for microbial activity is 25:1. If the nitrogen is insufficient in the soil after the straw is returned to the field, the microorganism will compete with the crop for nitrogen, and the wheat seedling will be deficient in nitrogen. Yellow, thin, and poor growth. Solution: After smashing the straw, 50 kg of ammonium bicarbonate or 20 kg of urea can be applied per acre on the surface of the straw, and then ploughed.
Anti-stalk crushing is too thick
Some of the smashed straw is too long and the length is more than 10 cm, which is not conducive to ploughing and affects planting. Solution: Use a large straw pulverizer with relatively large horsepower, so that the straw is smashed finely, and the rotary tillage is deeper, and the straw and soil are evenly mixed.
The depth of ploughing should be reasonable
When the corn stalks are returned to the field, they should be buried in the soil layer below 10 cm and compacted. At the same time, it should also be noted that Honda straw is still in Honda, and Honda's straw should not be returned to other fields.
Prevention of pests and diseases
When the corn stalks are returned to the field, the well-growing straw should be used. Do not return the corn stalks with pests and diseases to prevent the spread and spread of pests and diseases.
Special reminder: Straw with disease can not be directly returned to the field, otherwise if the corn is planted in the summer of the next year, it is easy to cause disease. Such straws should be destroyed or fertilized at high temperatures before being applied to farmland.
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