What fertilizer 1 and organic fertilizer are used for autumn fertilization of grapes?
To fertilize grapes in autumn, we should choose fertilizers mainly based on organic fertilizers, such as decomposed bean cake fertilizer, crop straw, decomposed human and animal manure, etc. , and then apply 400 to 500 kilograms of decomposed human and animal manure per mu, or use decomposed bean cake fertilizer.
2. Compound fertilizer
Grapes should be supplemented with NPK compound fertilizer in autumn, especially NPK fertilizer. Usually, 40-50 kg NPK compound fertilizer, 80- 100 kg calcium superphosphate or calcium magnesium phosphate fertilizer and 25-30 kg potassium sulfate are applied per mu, which can not only provide sufficient nutrients for plants, but also increase the stress resistance of grapes.
3. Fertilization method
When fertilizing grapes, dig a shallow annular ditch 25-30 cm away from the plant and 40-50 cm wide, then pour the fertilizer into the ditch evenly, cover it with soil and water it once to make the roots absorb water and nutrients better.
4. Daily management
In the process of maintaining vines in autumn, it is necessary to prune plants and cut off branches that grow too densely, too long and too weakly to reduce nutrient consumption. At the same time, check the growth of branches on the main stem, and then cut off branches that grow weakly and affect the appearance, which is beneficial to the growth of branches on the main stem.