The principle of fertilization: The demand of citrus for various nutrients should be fully met, organic fertilizer should be applied more, and inorganic fertilizer should be reasonably applied. Promote leaf nutrient diagnosis formula fertilization.

Fertilizer type and quality: Farmyard manure includes compost, manure, manure, biogas, green manure, crop straw, mud and cake; commodity fertilizers include commodity organic fertilizer, humic acid fertilizer, organic compound fertilizer, inorganic (mineral) fertilizer , organic-inorganic fertilizers, blended fertilizers and foliar fertilizers. Foliar fertilizer should be registered in the Ministry of Agriculture. Commodity fertilizers shall be registered and certified by the relevant national authorities and production licenses, and the quality indicators shall meet relevant national standards. Human and animal urine, etc. must be fermented at a temperature higher than 50°C for more than 7 days. Urban solid waste must be harmlessly treated and its quality meets national technical standards. The number of viable bacteria in microbial fertilizers must comply with relevant regulations. In addition, the use of industrial waste containing harmful substances (such as toxic gases, pathogenic microorganisms, heavy metals, etc.) is prohibited, and the use of fertilizers with higher chlorine content is restricted.

Fertilization method: The first is soil fertilization. There is a ring groove, a groove and a soil spreading method. The second is foliar dressing, but one or a half months before the maturity of citrus fruits can not use any foliar fertilizer.

1, increase organic fertilizer, with the application of chemical fertilizers. In citrus fertilization, in addition to base fertilizer to the main organic fertilizer, topdressing especially strong fruit fertilizer but also add enough organic fertilizer. Base fertilizer combined with deep plowing and soil improvement, per acre buried Qingshan, weeds, straw, manure, compost and other organic fertilizer 3500 kg or more, usually fertilization can use biogas fertilizer, cake fertilizer and other organic fertilizers. The strong fruit fertilizer requires adult trees to produce 2.5 kg of cake fertilizer, 0.5 kg of phosphate fertilizer, 0.3 kg of nitrogen fertilizer, and 0.3 kg of potassium fertilizer. The cake fertilizer is first mixed with phosphorus fertilizer to decompose, and then urea and potassium sulfate are added to the soil to effectively improve the fruit. quality.

2, add trace fertilizer. Based on the application of nitrogen, phosphorus, and potassium fertilizers, calcium, magnesium, zinc, boron, and other trace element fertilizers must also be applied. The application of trace fertilizer can be divided into two kinds: soil fertilization and foliar spray. If the soil is treated with calcium, lime can be sprinkled on the ground in early spring and then ploughed into the soil. Shisheng lime per 100 to 150 kg. This method has three functions: one is to apply calcium; the other is to change the acid; third is that the calcium ions in the lime can replace the fixed potassium ions in the soil colloid, which can increase the release of potassium fertilizer in the soil. Foliar spraying mainly controls three periods: first, flower bud differentiation (from early October to mid-November), spraying with 0.2% potassium dihydrogen phosphate + 0.2% urea 2 or 3 times, which can promote flower bud differentiation. Second, in the spring budding and budding period (in March and April), spray 0.1% Borax + 0.3% Zinc Sulfate + 0.2% Potassium Dihydrogen Phosphate 3 times to accelerate the aging of spring shoots and strong buds. The third is the rapid expansion of the fruit (June to July) with 0.3% potassium dihydrogen phosphate + 2% magnesium sulfate, or sprayed with Guangwensu or multiple fertilizers 2 or 3 times.

Dry Paprika

Laiwu Manhing Vegetables Fruits Corporation , https://www.manhingfood.com