The biogas fertilizer has the characteristics of wide source of raw materials, low cost, complete nutrition, high fertilizer efficiency and no pollution. The application of biogas fertilizer to fruit trees can improve the soil, and can improve the soil water retention, cold resistance and antifreeze ability. At the same time, it can enhance the photosynthesis of fruit trees, promote flower bud differentiation and preserve flowers and preserve fruit, and promote early maturity and ripening of fruits. Consistent, it can also enhance the tree potential to significantly reduce the pests and diseases, thus achieving the effect of increasing production and quality. The application of biogas fertilizer on citrus can increase the sweetness of citrus by 0.5-1 degree and increase yield by 10-30%.
I. Application of biogas residue fertilizer Biogas residue is a high-quality organic fertilizer with high nutrient content and good fertilizer efficiency. It should be applied as a base fertilizer during flower bud differentiation. Specific application method: the biogas residue, the straw and the soil are mixed and stacked, and then applied after fruit picking. Adult trees generally adopt ditch application, that is, ditch along the canopy drip line, the ditch depth is 20-30 cm, and the width is about 30 cm. The shallow extravasation is applied. Each plant has 50 kg of biogas residue and 1.5 kg of superphosphate. The young trees can be combined. The expansion hole is applied by a circular groove. The general groove depth is 15-30 cm, the groove width is 20-30 cm, and the soil is covered after application.
The biogas slurry is easy to be absorbed by plants and has comprehensive nutrition, good resistance to stress, fast fertilizer effect, and can also play a role in insecticidal and bacteriostatic action. It is mainly used for root topdressing and foliar topdressing.
1. Root topdressing, dilute the biogas slurry 2 to 3 times with water before use to prevent the root from being too high. Generally, 20-25 kg per plant is applied 10 days before the germination of the fruit trees, and the new shoots are applied again 15 days after the breeding. During the growth of saplings, the growth of the tree should be combined to determine the amount of fertilizer applied. The growth of the potential should be applied more. If the growth is good, the application should be less. If the fruit is more, the application should be repeated.
Second, foliar topdressing (1) for promoting the tip. In the spring shoots, summer shoots, autumn shoots grow to the mung bean large, spray the biogas slurry before the leaves on the shoots turn green, and there are tips for promoting shoots, strong shoots and insects. (2) Spraying the biogas slurry twice from the bud to the flowering front to preserve the fruit. (3) Spraying 2 to 3 times with 50% biogas slurry plus 0.3% potassium dihydrogen phosphate during fruit expansion can effectively increase the sugar content of the fruit, promote fruit coloration and early maturity. Spraying time should be carried out after drying in the morning dew. It is better to use after 6 pm in summer. Do not spray at high temperature and rain before noon. Spray on the back of the leaf to facilitate absorption. The specific spraying times and concentrations should be determined according to the growth period and season of the fruit trees. The general principle is fine seedlings, 1 part of biogas slurry plus 1 to 2 parts of fresh water in the tender leaf stage, 1 part of biogas slurry plus 1 part of clear water in summer high temperature season, the temperature is lower, and the old leaves can be diluted without adding water.
Third, matters needing attention
1. The biogas fertilizer can not be used immediately after it is discharged from the pond. Because the biogas fertilizer just out of the pond is highly reductive, he will compete with the crop for carbon dioxide in the soil, affecting the development of the root system, causing the crop leaves to yellow, so the biogas fertilizer must first be in the pond. Store in a septic tank for 5-7 days.
2, the use of biogas fertilizer can not be excessive, generally less than the use of ordinary pig manure, if blindly used in large quantities will lead to crop length.
3, can not be mixed with alkaline fertilizers such as grass ash, lime, and can not be mixed with pesticides. If mixed, it will cause loss of nitrogen and nitrogen fertilizer, and reduce fertilizer efficiency.
Chenggu Zhibao Station Wang Dongxia
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