The invention discloses a
nutrition regulating agent for regulating the mature period of citrus fruits and application of the
nutrition regulating agent. The
nutrition regulating agent is prepared from
potassium nitrate,
monopotassium phosphate,
magnesium sulfate,
ferric sodium ethylenediaminetetraacetate,
zinc sodium ethylenediaminetetraacetate,
boric acid,
ammonium molybdate,
gibberellin,
abscisic acid and diatomite which is supplemented to 100 parts. The invention further provides a preparation method of the nutrition regulating agent and application of the nutrition regulating agent in regulating the mature period of citrus fruits, and the application mode is that when the
diameter of the citrus fruits is 40-50 mm, the preparation is diluted by 600-800 times to be sprayed on leaf surfaces, once every 7 days and twice continuously. Through the synergistic effect of mineral
nutrient elements and low-concentration hormones, bidirectional precise regulation and control of the citrus mature period are achieved, fruits can be promoted to mature in advance or later for 7-15 days, the
sugar-acid ratio and color of the fruits can be remarkably improved, meanwhile, the problems of tree vigor decline and quality decline caused by single
hormone treatment are solved, and the method is suitable for large-scale popularization and application. The method has the characteristics of high efficiency, safety and simple operation.