base fertilizer Â
   1. Main fertilizer types: The base fertilizer is the basic fertilizer provided for the annual growth and development of the pear trees and the flowering results. The base fertilizer should be based on organic fertilizer. Commonly used organic fertilizers mainly include mature soil fertilized fertilizers (such as column fertilizer, compost, green manure, cake fertilizer, etc.) and commercial organic fertilizers (including pure organic commercial fertilizer, organic compound fertilizer, bio-organic fertilizer, humic acid fertilizer, etc.) . Prohibited containing harmful heavy metal contaminated waste, sewage sludge and other organic substances and the like.
 2 , application rate: the amount of base fertilizer application generally accounts for about 70% of the annual fertilization amount . Chengling Garden often needs 2,000 to 5000 kilograms of soil fertilizer, green manure and other soil fertilizers , plus 50 kilograms of superphosphate or calcium magnesium phosphate . It is recommended to apply soil fertilizer together with appropriate microbial fertilizer, or directly apply high quality bio-organic special fertilizer (or special balanced fertilizer). Â
   3 , fertilization method: combined with soil improvement, deepening the application of deep points every year. I.e. 1, 3, 5 digging in along the sides of the planting hole in the canopy pockets side length of 100 cm wide and 50 cm 40 cm deep groove fertilization, gradually spreading outward. In the 2nd , 4th , and 6th years, the ditch was dug on the other side and the base fertilizer was applied. In the 7th and 8th years, the whole garden can be applied on the ground, combined with deep turning. The base fertilizer is applied in September - December , as early as possible. It can also be fertilized by means of ring, radial or groove. Â
   top dressing Â
   When the amount of base fertilizer is insufficient, the topdressing should be carried out in stages during the growing season to provide nutrients for the different growth stages of the tree. The topdressing fertilizer is mainly composed of a compound fertilizer with nitrogen, phosphorus and potassium of 15% , and as an example, it is described as follows. Â
   1. Pre-flowering fertilizer: 20 kg per acre is applied in mid- January to promote the growth, flowering and germination of new roots. Â
   2, strong fruit fertilizer: divided into two application, the first time in late May, was applied to 20 kg per acre, and add 11 kg of potassium sulfate; 6 months in the second time, late, the 40 per acre kilogram. To meet the large nutrients needed for fruit enlargement , promote flower bud differentiation. Â
   3, taken Higo: After harvest in late August, was applied to 20 kg per acre. In order to restore the tree potential, improve the function of the leaves, extend the life of the leaves, and increase the storage nutrients of the trees. Â
   Top dressing Â
   When the tree body needs a certain nutrient element in a certain period of time and the root system absorbs it and is difficult to satisfy, or when the soil lacks a certain element, foliar spray fertilizer can be carried out, and it can also be combined with spraying. Â
    Usually water-soluble fertilizer, could be used for foliage, concentrations used: urea 0.3 - 0.5%, 0.5% superphosphate, potassium 0.5%, 0.5% potassium dihydrogen phosphate, 0.3% borax, ferrous sulfate 0.05 - 0.1% , zinc sulfate { post-emergence } 0.1 - 0.4% , { before germination } 1 - 5% . When mixing or when it is hot or hot, the concentration is slightly lower. In recent years, liquid surface fertilizers composed of a variety of trace elements and liquid surface fertilizers composed of growth regulating substances, amino acids and microorganisms have emerged, and can be applied after trial use. Â
   Interplanting green manure Â
   In the young garden, it can be used as a green manure for the legumes of the leguminous family, the milk vetch, or the ryegrass of the grass family. Sowing in mid- September , 5 kg of calcium magnesium phosphate fertilizer, potassium sulfate and ammonium molybdate per acre . It is castrated before the onset of drought in the middle and late June of June . Generally, the yield per acre is about 500-1000 kg, which is used as a summer cover and fertilizer for young trees. Â
   Ground cover   Â
   In the middle of July , before the plum blossoms, the orchard's ground cover, which is conducive to the smoothness of the roots and the normal growth of the fruit and the growth of the trees. The covering material may be crude fiber organic matter such as straw, weeds, and straw. Qingnengyuan first year grass At the time, about 5 kg of straw is required per square meter , that is, about 3,500 kg per mu . If the material is insufficient, it can be partially covered under the canopy, and the organic matter is continuously collected for replenishment. It can also be covered with a mulch, but not If you use organic substances, it is good.Emergency Batten Light can be lit for 3 hours at 5w in case of power failure.
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