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Efficient agricultural fertilizer conversion and utilization method

A high-efficiency, chemical fertilizer technology, applied in fertilization methods, botanical equipment and methods, applications, etc., can solve problems such as limited prevention and control effect, impact on target crops, etc., to improve utilization, low cost, control or reduce agricultural non-point sources. The effect of pollution

Inactive Publication Date: 2015-04-01
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has a great impact on the production of target crops, and has limited effects on the prevention and control of N and P in water bodies.

Method used

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  • Efficient agricultural fertilizer conversion and utilization method
  • Efficient agricultural fertilizer conversion and utilization method
  • Efficient agricultural fertilizer conversion and utilization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The main material of this example: NH 4 CL, KNO 3 , 1 / 10 Hogland nutrient solution (pH 5.5), Qingping, Ziping with few roots, Ziping with many roots.

[0028] Based on the concentration in general sewage water, on the basis of 1 / 10 Hogland nutrient solution, the nitrogen nutrition in it is adjusted to contain NH 4 + : NO 3 -The ratio is 1:1, and the N concentration is 10.5mg / L. Take multiple 350ml disposable transparent plastic cups and pour 200ml of the above culture solution into them respectively. Select good-growing varieties of Qingping, less-rooted and multi-rooted Ziding, and set up five duckweeds to put in treatments A, B, C, D and E. The fresh weight ratios were 9:1:1, 1:3:1, 1:1:3, 3:1:1 and 4:2:2 respectively, and the dosage of duckweed in each treatment was 0.1g. 4 repetitions were set up for the treatment, and a blank control without adding duckweed was made. Replenish lost moisture with deionized water daily.

[0029] The measurement item is the c...

Embodiment 2

[0032] The main material of this example: K H 2 PO 4 , 1 / 10 Hogland nutrient solution (pH 5.5), Qingping, Ziping with few roots, Ziping with many roots.

[0033] Based on the concentration in general sewage water, on the basis of 1 / 10 Hogland nutrient solution, the phosphorus in it is adjusted to a P concentration of 7.5mg / L. Take multiple 350ml disposable transparent plastic cups and pour 200ml of the above-mentioned culture solution into them respectively; select the varieties of green duckweed, less-rooted purple duckweed and multi-rooted purple duckweed with good growth, and set up five duckweeds for treatment A, B, C, and D and E, the fresh weight ratios of their Qingping: less-rooted Ziping: multi-rooted Ziding are 9:1:1, 1:3:1, 1:1:3, 3:1:1 and 7 respectively: 2.5: 1.5, the dosage of duckweed in each treatment was 0.1g, and each treatment was set with 4 replicates, and a blank control without duckweed was made. Replenish lost moisture with deionized water daily.

[...

Embodiment 3

[0037] The main materials of this embodiment are paddy rice planting test field, Qingping, few-root Ziping and many-rooting Ziping.

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Abstract

An efficient agricultural fertilizer conversion and utilization method includes in the early period of rice growth, utilizing different characteristics of different duckweed growth periods, feeding various duckweed configured in a composite manner into the paddy field, installing a duckweed baffling device at the water drainage port of the paddy field to prevent the duckweed from flowing out with water flow, when rice seedlings require little nutrition, allowing the duckweed to absorb nutrition from the water of the field for growth to store the nutrition inside; in the tillering period, allowing the duckweed to accumulate in the field in large amount and to be decomposed gradually to supply nutrition to the rice in various growth period after the tillering period; in the field drying period, allowing the duckweed to sink to the mud and rots gradually to serve as green fertilizer so as to supply nutrition to rice subsequently and optimize the soil environment. The method has the advantages of simple operation and low cost, excessive nitrogen and phosphorus of the field can be converted into nutrition required by rice growth, the fertilizer utilization rate is increased, the effects of preventing paddy field non-point source pollution and fertilizing the soil are achieved, and the method can be applied to rice cultivation.

Description

technical field [0001] The invention relates to a method for efficiently utilizing agricultural chemical fertilizers, in particular to a method for efficiently transforming and utilizing agricultural chemical fertilizers through compound duckweed, and belongs to the field of agricultural technology. Background technique [0002] During the process of fertilizing crops, the nitrogen utilization rate of crops is only 20%-35%, most of the nitrogen is absorbed by the soil for the crops to gradually absorb and use, and 5%-10% volatilizes into the atmosphere; with the precipitation runoff and 20%-25% of the nitrogen leaked out of farmland is the nitrogen fertilizer applied in the season, and in terms of the pollution of nitrate nitrogen in surface water (lakes, etc.), nitrogen fertilizer accounts for more than 50%. The utilization rate of phosphorus fertilizer by crops is also very low. Usually, the utilization rate of crops in the current season is only 5%-15%, and after-effects ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G1/00
CPCA01C21/005A01G22/00
Inventor 沈健英黄荣松陈侠桦郭利利
Owner SHANGHAI JIAO TONG UNIV
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