Nutrient element nutrition diagnosis method for Jinhuang mango leaves

Abstract

The invention belongs to the technical field of leaf nutrition diagnosis, and discloses a nutrient element nutrition diagnosis method for Jinhuang mango leaves. The method comprises the following steps: randomly taking current-year newly-sprouted canopy tip leaves from four directions of east, south, west and north of the middle upper part of the outer side of a tree body, and taking each plot asa mixed sample; wiping the collected leaves by using a wet towel cleaned by deionized water, removing dust and pesticide residues on the surfaces of the leaves, bagging the leaves, putting a leave baginto an electrothermal blowing drying oven for fixation, drying at constant temperature, grinding the leaves into powder by using a powder sample machine under a leaf drying condition, packaging, numbering, and storing to-be-detected leaf mineral nutrients; total nitrogen by wet ashing sodium salt colorimetric method; total phosphorus by a wet ashing molybdenum antimony anti-colorimetric method;total potassium by dry ashing flame photometry determination; total calcium and total magnesium by a dry ashing atomic absorption method; and total sulfur by a concentrated nitric acid, perchloric acid and concentrated hydrochloric acid digestion barium sulfate turbidimetry. When the measured value is higher than the standard range, the fertilizer utilization rate is improved; and when the measured value is lower than the standard range, appropriate fertilization measures should be taken.

Description

technical field [0001] The invention belongs to the technical field of leaf nutrition diagnosis, and in particular relates to a nutritional diagnosis method of Jinhuang mango leaf nutrition elements. Background technique [0002] At present, mango (Mangifera indica L.) belongs to the evergreen tree of Anacardiaceae (Anacardiaceae). It is known as the "king of tropical fruits" because of its unique flavor and high nutritional value. At present, mangoes are planted in more than 100 countries , which occupies a certain position in world production and trade. China has a history of more than 1300 years of mango cultivation and is the sixth largest mango producer in the world. Hainan is one of the important provinces for mango cultivation in China. Its mango cultivation areas are mainly distributed in Sanya, Ledong, Lingshui, Changjiang, Dongfang and other cities (County), mainly early-maturing varieties, Jinhuangmango has become one of the main varieties due to its high yield, ...

AI Technical Summary

Problems solved by technology

[0005] (1) Existing technology explores the nutrient content of mango leaves of multiple varieties and analyzes the change trend, all of which are in the same planting site and the cycle is short, which is not enough to formulate nutritional diagnostic standards

[0006] (2) At present, there is no systematic research on the nutritional diagnosis of Jinhuang mango leaves, and there is no clear sampling time, sampling location, and leaf nutrient abundance standards, which cannot provide reference and basis for scientific fertilization

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