1, fertilization time. Autumn basal fertilization is two to three months ahead of winter basal fertilization, and should be carried out immediately after picking fruit and clearing the garden.
2, fertilization types. Autumn Schiff base fertilizer should be dominated by organic fertilizer (fertilizer, soil miscellaneous fertilizer, cake fertilizer, plant ash, etc.), supplemented by chemical fertilizers, so that the combination of improved soil and support, delayed and complementary effects. The application of fertilizers should pay attention to the proportion of nitrogen, phosphorus, and potassium fertilizers, and it is not appropriate to use too much available nitrogen fertilizer, otherwise it is easy to cause late autumn shoots. At the same time, it is necessary to apply trace elements in a targeted manner. The application amount of fertilizer should be determined according to the size of the fruit tree, nutritional status, and the number of fruit-bearing fruits. In mature fruit trees, 40-60 kg of organic fertilizer, 0.15 g of urea, 2-4 kg of phosphate fertilizer and 0.5 kg of potassium fertilizer are applied per plant.
3, fertilization method. Available trench or disk cast. When the ditch is applied, a fertilization ditch such as a circle, a rectangle, or an arc is formed at the position of the canopy drip line, and the ditch depth is 40-50 cm. The width of the ditch should be determined depending on the amount of fertilizer, and the ditch should be flat. Spread the dry fertilizer in the ditch after watering, and cover the soil immediately after the water is dry. When fertilizing, the fertilizer should be applied layer by layer. The coarse fat such as leaves and weeds should be placed on the bottom layer. The top layer should be filled with organic fertilizer. Each layer of fertilizer should be coated with a layer of soil. The final amount of fertilizer should be 20-30 cm above the ground.
Due to the staggered distribution of roots in adult orchard soils, discs can be applied, ie the topsoil can be split along the spacing or row spacing on one side of the plant, while the trunks should be shallow (8–10 cm) near the trunk, and it should be far away from the trunk. Deep (40-60 cm). Apply dry fertilizer and cover soil afterwards. In addition, apple trees and pear trees should be applied deeper, and peach trees and grape vines should be applied slightly lighter.
The new flood control and water retaining plate is made of composite materials and weighs only 3.8kg. It is easy to use and fast to install. The water baffle uses the "L" shape principle. The erected structure is used to block rainwater, and the ground structure can convert the accumulated water into pressure, so that the water baffle will not fall.
The new type of water retaining plate is flexible and flexible. It can be used in semi closed tunnels when there is less rainwater on the road surface, allowing special vehicles such as buses to pass first. Once the rainstorm becomes a disaster, the tunnel can be completely closed quickly to avoid greater damage.
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