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Controlled-release fertilizer and application thereof

A technology of fertilizers and fertilizer sticks, applied in controlled-release fertilizers and its application fields, can solve problems such as not being able to meet the needs of nutrient absorption depth, and achieve good water solubility

Inactive Publication Date: 2021-04-16
STANLEY AGRI GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it is possible to mix coated fertilizers with different nutrient release cycles to achieve the purpose of staged release, the distribution of fertilizers with different release cycles is not different during fertilization, which cannot meet the needs of different growth stages of peanuts for the depth of nutrient absorption. need

Method used

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  • Controlled-release fertilizer and application thereof
  • Controlled-release fertilizer and application thereof
  • Controlled-release fertilizer and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Step 1: In parts by weight, 5.12 parts of calcium ammonium nitrate, 5.12 parts of ammonium sulfate, 13.74 parts of monoammonium phosphate, 20.61 parts of potassium sulfate, 55.08 parts of dolomite powder, and 0.32 parts of ferrous sulfate are fully mixed through a mixer, and the The press is compressed into a rod shape, and the size control diameter is 1 cm, and the length is 12 cm to obtain a fertilizer rod.

[0052] Step 2: In parts by weight, mix 61.52 parts of urea, 31.32 parts of monoammonium phosphate, 3.13 parts of zinc sulfate monohydrate, 3.13 parts of boric acid, 0.22 part of ammonium heptamolybdate, and 0.67 part of mineral source potassium fulvic acid into the melting tank. Heat to 120°C-130°C and stir to form a uniform slurry.

[0053] Step 3: In parts by weight, dissolve 48.67 parts of urea in an aqueous solution, add potassium hydroxide to adjust the pH to 7.5, heat to 50°C, and keep it stable, add 51.33 parts of formaldehyde solution to react, after 0.5 ...

Embodiment 2

[0061] Step 1-2 is the same as embodiment 1, step 3 adds formaldehyde and reacts for 1 hour.

Embodiment 3

[0063] Step 1-2 is the same as embodiment 1, and step 3 adds formaldehyde and reacts for 3 hours.

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Abstract

The invention relates to the technical field of fertilizers, in particular to a controlled-release fertilizer and application thereof. The controlled-release fertilizer comprises a fertilizer rod and a fertilizer separation film formed on the surface of the fertilizer rod, in the longitudinal axis direction of the fertilizer rod, the fertilizer separation film is divided into a fertilizer separation film upper section, a fertilizer separation film middle section and a fertilizer separation film lower section which are sequentially connected from top to bottom; in the fertilizer separation film upper section, the mass percentage of urea is 50% or above; in the fertilizer separation film middle section, the mass percentage of urea is 45-52%, and the mass percentage of urea formaldehyde is 20-25%; and in the fertilizer separation film lower section, the mass percentage of urea formaldehyde is more than 90%. The controlled-release fertilizer can achieve nutrient staged release, the release depth is gradually reduced, the requirements of crops for different nutrient compositions and absorption positions in different growth periods are better met, growth in different periods is promoted, the utilization rate of the fertilizer is increased, and finally the yield and quality are improved.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a controlled-release fertilizer and its application. Background technique [0002] Peanut is an annual herbaceous oil-bearing crop of the leguminous family. China is the largest peanut producer and exporter in the world. It has rich resources of peanut varieties and a wide range of planting. It is mainly concentrated in the Huanghuaihai River Basin, the southeast coast and the Yangtze River Basin, Henan, Shandong, Hebei, and Guangdong. , Anhui, Hubei, Sichuan, Jilin, Liaoning and Guangxi are the main peanut producing areas in China. [0003] Covering cultivation techniques are commonly used in northern peanut planting to resist low temperature and spring drought, promote peanut growth and development, improve peanut quality, and increase premature yield. In the early stage of peanut growth, the number of root nodules is small, and the ability to fix nitrogen is weak. In the ...

Claims

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Application Information

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IPC IPC(8): C05G3/40C05G3/80C05G5/14C05G5/30
Inventor 杨恒哲崔然王洪富王婷婷李元峰白静张广忠徐勤政
Owner STANLEY AGRI GRP CO LTD
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