Young saplings are usually fertilized 5-6 times a year. In order to maintain a regular supply of nutrients, fertilization can be applied in other seasons except winter. Generally every two months, once fertilization, nitrogen-based, how much fertilizer and fertilizer by soil fertility difference when planting, are generally saplings should be thin manure handling facilities, mature trees typically 3-4 times in fertilization. The first time after picking fruit from May to June until the beginning of summer shoots, it is mainly to restore the tree potential, promote the summer shoots, grow vigorously, and lay a good foundation for flower development. This time, fertilization should be applied in combination with slow-acting fertilizer, and the amount of fertilizer applied should be about 50 % of the total fertilizer used throughout the year . Late-maturing seeds can be applied before harvesting. The second time before the flowering in September-October , it mainly promoted the flower buds to be strong, normal flowering and improve the cold resistance of the tree. Mainly based on decomposed farmyard manure, with a small amount of chemical fertilizer, the amount of fertilizer applied accounts for 10 % to 20 % of the total. The third flight of young fruit began to expand application of the following year 2-3 months, after which it is thinning during the first spring shoot pumping hair, the main fertilizer to promote the growth of young fruit to reduce fruit drop, and promote spring shoot shoot pumping hair and enrich The amount of fertilizer applied accounts for 20 % to 30 % of the total . For the fourth time, the young fruit was applied quickly during the hypertrophy period. In the later period of the loquat fruit, it quickly gained weight in a short period of time, reaching 70 % of the total fruit weight , and nutrients such as sugar also accumulated rapidly. So does the nutrient supply period, not only affects yield, lower quality, but also damage the tree is large, it should schedule around 10% of the total amount of fertilizer as the fourth fertilization. This fertilization is especially important for late maturity. In some places, 3 % superphosphate and 0.3% urea were used for external application, and good results were also obtained.
The climate, variety, soil fertility and cultivation habits are different, and the fertilization period is not completely consistent, but the effects and objectives are basically the same. In general the Yangtze River Shi fertilizer in spring, summer and fertilizer, fertilizer three times in autumn, the South China Gasch 1 winter fat, which is different according to the climate and loquat growth characteristics, and take measures to local conditions of fertilization. Taiwan loquat taken four times fertilization system, respectively, in January-February, April-May, June and October to December fertilization, each strain nitrogen, phosphorous and potassium fertilizer 2 kg.
The amount of fertilizer applied should be determined according to the age of the tree, the amount of flowering in the current year, and the climate and soil fertility. In hill orchards with low soil fertility, the amount of fertilizer applied per hectare is: nitrogen (N) 187.5-225 kg, phosphorus 150-187.5 kg, potassium 187.5-225 kg. Deep or fertile orchard in the soil layer, fertilization amount per hectare: nitrogen (N) 150 kg, phosphorus 93.75 kg, potassium 112.5 kg.
Fertilization methods include ditch application, surface application, and application with irrigation water. Ditch application is the most commonly used fertilization method in the garden. The young tree is dug in the outer ring of the canopy, and the soil is covered after fertilization. The adult fruit tree is mostly treated with radial ditch or inter-row strip ditch. To cover the soil, to reduce fat loss and improve fertilizer efficiency.
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