Special magnesium-containing fertilizer with soil conditioning function for citrus as well as preparation method and fertilization method of special magnesium-containing fertilizer

Abstract

The invention discloses a special magnesium-containing fertilizer with a soil conditioning function for citrus as well as a preparation method and a fertilization method of the special magnesium-containing fertilizer. The fertilizer comprises a germination fertilizer and a fruit-growth-promotion fertilizer; inner layer particles of the germination fertilizer comprise available nutrients and slow-acting nutrients, the exterior of the germination fertilizer is wrapped by a functional acid-regulating layer, fruit-growth-promotion fertilizer particles comprise available nutrients and slow-acting nutrients, the available nutrients comprise water-soluble magnesium, the slow-acting nutrients comprise active magnesium, and the external functional acid-regulating layer comprises alkaline magnesium. According to the special magnesium-containing fertilizer with the soil conditioning function for the citrus, provided by the invention, the magnesium nutrient proportion is scientific and comprehensive, quick-acting, slow-acting and long-acting nutrients can be provided at the same time, the nutrient release is balanced and reasonable, the period can reach 180 days, and the balanced supply of magnesium nutrients required by the growth period of the citrus is completely realized. The special magnesium-containing fertilizer for the citrus has a soil conditioning function and a nutrition function, effectively improves the quality of the citrus, increases the yield and increases the income.

Description

technical field [0001] The invention relates to a special magnesium-containing fertilizer for citrus with soil conditioning function, a preparation method and a fertilization method thereof, and belongs to the technical field of agricultural fertilizers. Background technique [0002] Citrus is a plant belonging to Rutaceae, which is the general name of tangerine, tangerine, orange, kumquat, pomelo, and trifoliate. China is one of the important origins of citrus, and it is also the country with the largest planting area. It is mainly concentrated in Guangxi, Fujian, Jiangxi, Hubei, Chongqing and other southeast, southern, and southwest regions. Statistics show that the citrus planting area in 2018 has It has reached more than 38 million mu and the output has reached more than 35 million tons. It has become the second largest fruit industry. [0003] Magnesium (Mg) is one of the intermediate nutrients necessary for plant growth and development. It has an irreplaceable role in...

AI Technical Summary

Problems solved by technology

It can be seen that soil acidification and magnesium deficiency lead to the decline of citrus yield and quality, which has seriously restricted the development of citrus industry. It is of great significance to regulate the acidic soil in citrus production areas and balance magnesium nutrition.

[0006] However, in actual production: the application of lime and dolomite powder in citrus producing areas is the main measure to correct soil acidification. This measure is dusty during application and can only increase the pH value of the surface soil, but it does not affect the acidification of the subsurface C>20cm soil layer. There is little effect of rectification, and a large amount of application will lead to defects such as soil compaction, so it is difficult to promote and apply for a long time

In addition, farmers lack knowledge of fertilization. Some farmers mainly use magnesium sulfate, magnesium oxide, and calcium-magnesium phosphate fertilizers. Magnesium sulfate is a physiologically acidic fertilizer with good water solubility. However, the soil in citrus producing areas is severely acidified and the rainfall is abundant. High rainfall will lead to severe leaching or runoff loss of magnesium, which cannot meet the demand for magnesium in the middle and late stages of crops. Magnesium oxide and calcium magnesium phosphate fertilizers are citrate-soluble magnesium fertilizers, which have poor quick-acting properties and cannot meet the critical growth period of citrus. A large supply of magnesium

The published patent technology does not have a scientific guidance plan for applying magnesium fertilizer to citrus. Chinese patents CN107522551A, CN111606748A, and CN109928853A only disclose that a small amount of magnesium is added to a large amount of element compound fertilizer to form a multi-element compound fertilizer, which can be used as a citrus-specific or package fertilizer. , its disadvantages are: first, in order to ensure the effective content of a large number of elements (nitrogen, phosphorus and potassium), the amount of magnesium added is low (Mg<1.0%), and most of the individual magnesium-containing elements are introduced by the magnesium present in phosphate rock , far less than the demand for magnesium nutrients in citrus (citrus needs more magnesium than phosphorus); second, adding magnesium to multi-element compound fertilizer products will cause antagonism between magnesium and potassium or calcium , which seriously affects the release and utilization rate of effective nutrients in fertilizers, and ultimately affects the quality and yield of citrus

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