The "organic fertilizer + formula fertilizer" model takes apples as an example: applying 3000 to 4000 kg of farmyard manure per mu, or applying according to "Jin Guo Jin Fei", combined with a certain amount of NPK fertilizer. Combined with deep soil improvement and tree expansion, ring furrow or strip furrow method is adopted, which is best applied from the end of autumn to the end of September to the end of October.
The "composite breeding" mode takes "citrus + chicken raising" as an example: choose a production garden that is more than 15 years old and plant 50 to 60 plants per mu. The dense planting garden is properly interlaced according to local conditions. The stocking orange orchard is divided into two or three, alternately stocked or alternately stocked, the density is 30-50/mu, so that weeds, insects and other animal and plant feed sources can rest and recuperate.
The "organic fertilizer + water and fertilizer integration" model takes bananas as an example: it uses fixed drip irrigation equipment and is designed according to the terrain. The water supply pipe adopts PVC～U pipe, and the transportation pipe network adopts the three-stage pipe network "Feng" shape layout. According to the actual situation, a bypass fertilization tank and a self-pressure micro-irrigation system after the injection pump are used. Small orchards can use manual control systems, large orchards use automatic control systems. Organic fertilizer is used as the base fertilizer, and water-soluble chemical fertilizer can be selected for top dressing, as well as soluble organic fertilizers such as humic acid, fulvic acid and amino acids, or biogas slurry after precipitation and filtration, and the amount and frequency of top dressing can be determined according to the number of leaves. Drain in time when there is too much water, and irrigate in time when the field soil water holding capacity is less than 75%.
"Natural grass + green manure" model takes apples intercropped with green manure rape as an example: the planting amount is 0.5 kg/mu with good moisture content, 0.75 kg/mu with normal moisture content, and 1 kg/mu with poor moisture content; Replanting seedlings; planting between rows, clearing between plants, planting belt at least 50 cm away from the trunk of the tree. Apply 5 kg/mu of pure phosphorus before sowing, 1 kg/mu of urea as seed fertilizer when sowing, and apply 7-8 kg/mu of urea according to soil moisture when rape is 5-6 leaves. Based on the principle of maximum yield of grass and no impact on orchard farming, the cut rape can be directly covered under the tree plate, and can also be ploughed into the soil.
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