Pears have been widely cultivated in China. Since their vegetative growth and reproductive growth are carried out at the same time and are concentrated from March to November, strengthening water and fertilizer management is the key to high quality and high yield.
Biogas fertilizer is the residue after the biogas fermentation, such as biogas residue and biogas slurry, is a kind of fertilizer with rich nutrients and quick effects. Biogas fertilizer is rich in nitrogen, phosphorus, potassium, humus, a variety of trace elements and fertilizer function of both late and fast, which is very suitable for the growth of pear trees. The use of marsh-fertilizer pears, good flower bud differentiation, neatly arranged shoots, thick green leaves, uniform fruit, good glossiness, high sweetness, and enhanced vigor, can increase the ability of pears to resist ringworm disease and black heart disease, and increase yields by 10%. About 50% of fertilizer investment is saved.
The specific application method is:
1. Pear saplings, during the growing season, can be applied once a month to marsh, and each plant applies 10 kilograms of biogas slurry each time, in which the spring shoot fertilizer is applied with 10 kilograms of deep biogas residue per plant.
2. Adult fruit trees are planted to produce fertilizer, mainly based on basal fat. Base fertilizer accounted for 80% of the total amount of fertilization in the whole year. Generally, it is carried out during the dormancy period of pear trees in early spring. The radial grooves are excavated around the trunk, and 50 to 100 kilograms of biogas residues are applied to each plant, supplemented with 250 grams of compound fertilizer and covered with soil after application.
(1) The base fertilizer of pear tree exerts a great influence on the growth and development of pear trees: First, from September to November, the pear trees entered the second peak of growth, and fertilization is beneficial to the rapid decomposition of fertilizers, which is beneficial New roots absorb stored nutrients.
(2) Before flowering: 10 to 15 days before flowering, 50 kg of biogas slurry per plant, 50 g of urea, and root application.
(3) Strong Fruit Fertilizer: The first fertilization was performed one month after flower Xie. Each plant applied 30 kg of biogas residue or 50 kg of biogas slurry, plus 100 g of compound fertilizer, and ditched deeply. The second time in the 2 months after flowering, the fertilizing amount method was the same as the first.
(4) Yang Fei: After fruit picking, apply 30 kg of biogas slurry to each plant, add 50 grams of urea, and apply it to the roots. Fertilizer after harvesting should avoid the growth of autumn shoots.
3, matters needing attention
(1) Pears are big fruit-fermented fruit trees. Although they are rich in nitrogen, phosphorus and potassium, they are still less for pears. Therefore, it is necessary to supplement fertilizers and other organic fertilizers. Adult fruit trees need 250-300 kilograms (60% of fresh residue) to meet nutritional needs.
(2) If the combination of biogas fertilizer and pears is applied to fertilization, the effect is better.
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