Nitration-inhibiting slow-release compound fertilizer for dual purposes of basal application and topdressing

A slow-release compound fertilizer and nitrification inhibition technology, which is applied in urea compound fertilizer, fertilization equipment, application, etc., can solve problems such as low fertilizer utilization rate, groundwater pollution, and soil nitrate accumulation, so as to improve labor productivity and reduce nitric acid Salt content, the effect of reducing the loss of nitrogen in farmland

Pending Publication Date: 2019-03-12
HEBEI AGRICULTURAL UNIV. +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The management mode of extensive fertilization and irrigation of facility vegetables will not only lead to low fertilizer utilization effici

Method used

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  • Nitration-inhibiting slow-release compound fertilizer for dual purposes of basal application and topdressing
  • Nitration-inhibiting slow-release compound fertilizer for dual purposes of basal application and topdressing
  • Nitration-inhibiting slow-release compound fertilizer for dual purposes of basal application and topdressing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1. Base topdressing dual-purpose nitrification inhibiting slow-release compound fertilizer and its configuration.

[0025] A dual-purpose nitrification-inhibiting slow-release compound fertilizer for base application and topdressing, its components include dicyandiamide, urea, potassium sulfate, ammonium polyphosphate, and excipient auxiliary materials, and dicyandiamide accounts for 2.5% of the total weight of the compound fertilizer. Wherein the weight ratio of nitrogen, phosphorus and potassium nutrients is 19:8:21, and the total content of nitrogen, phosphorus and potassium nutrients calculated by weight percentage is 48% of the total weight of the compound fertilizer.

[0026] In terms of configuration, the compound fertilizer is a granular fertilizer, which contains an inner core composed of urea, potassium sulfate, ammonium polyphosphate, and excipients, and an outer cladding formed by spraying dicyandiamide on the inner core; the diameter of the inner ...

Embodiment 2

[0028] Embodiment 2, field planting test.

[0029] (1) Test materials.

[0030] The test crop is cucumber, and the variety is "Jinyou No. 1" by Tianjin Cucumber Research Institute.

[0031] (2) Test method.

[0032] The test site is located in the glass greenhouse of the Luquan Agricultural Environmental Science Observation and Experiment Station of the Ministry of Agriculture - the test base of the Hebei Academy of Agriculture and Forestry Sciences in Dahe Town, Luquan City, Shijiazhuang City. The soil for testing is calcareous cinnamon soil, and its basic nutrient content is shown in Table 1:

[0033]

Available phosphorus (mg / kg)

Available Potassium (mg / kg)

Total nitrogen (g / kg)

Total phosphorus (g / kg)

Total potassium (g / kg)

Organic matter (g / kg)

pH

content

28.37

73.50

1.14

0.82

19.19

14.32

8.2

[0034] A total of 5 treatments were designed in this experiment, and 3 repetitions were set for each treatme...

Embodiment 3

[0041] Embodiment 3, analysis and discussion: the positive effect of the present invention on reducing the loss of farmland nitrogen.

[0042] 3.1 The impact of this patented product on reducing gaseous nitrogen loss in farmland

[0043] 3.1.1 Effects of different fertilizer types on ammonia volatilization in cucumber farmland soil

[0044] Such as Figure 4. As shown, the changing rules of ammonia volatilization under each treatment during the whole growth period of cucumber. The overall performance is that the amount of ammonia volatilization after topdressing at the flowering stage is greater than that after application of base fertilizer. The application of the patented product (Inhibitor) can effectively reduce the rate of ammonia volatilization. Among the treatments, the ammonia volatilization rate was the highest under the farmer's customary fertilization (FP) treatment, and the maximum volatilization rate after topdressing was 0.97kg / (hm 2 .d); the application of thi...

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PUM

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Abstract

The invention discloses a nitration-inhibiting slow-release compound fertilizer for dual purposes of basal application and topdressing. Components of the compound fertilizer comprise dicyandiamide, urea, potassium sulfate, ammonium Polyphosphate and an auxiliary material, wherein the dicyandiamide accounts for 2.2-3.7% of a total weight of the compound fertilizer, a weight proportion of nitrogen,phosphorus and potassium nutrients is (15-25):(6-10):(18-26), and calculated by a weight percentage, total content of the nitrogen-phosphorus-potassium nutrients is not lower than 40% of the total weight of the compound fertilizer. The compound fertilizer is capable of delaying conversion from ammoniacal nitrogen in soil to nitric nitrogen through using combined application of a nitrification inhibitor and a nitrogen fertilizer, remarkably reducing loss of farmland nitrogen, and effectively improving vegetable yield and quality, and has an ecological protection value.

Description

technical field [0001] The invention relates to the technical field of agricultural chemical fertilizers, in particular to a functional nitrification inhibiting slow-release compound fertilizer. Background technique [0002] With the continuous improvement of the living standards of urban and rural residents, residents' demand for vegetables continues to increase. As a high-input, high-output production system, facility vegetables have become the agricultural pillar industry in many regions of my country. In 2014, the area of ​​protected vegetables in Hebei Province reached 1.37 million hectares, and will increase by 400,000 mu per year. The management mode of extensive fertilization and irrigation of facility vegetables will not only lead to low fertilizer utilization efficiency, but also cause the accumulation of nitrate content in the soil, causing environmental pollution problems such as groundwater pollution. Therefore, finding the best fertilization method to reduce t...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/08C05G5/00C05G3/90
CPCC05B17/00C05G3/00C05G3/90C05G5/30C05C9/00C05D1/02Y02P60/21
Inventor 王凌李博文刘孟朝张国印刘文菊杨志新张丽娟赵欧亚孙世友侯利敏陶晡韩宝文茹淑华徐万强
Owner HEBEI AGRICULTURAL UNIV.
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