Method for determining optimal nitrogen fertilizer application amount of flue-cured tobacco

A technology of application rate and flue-cured tobacco, applied in fertilization methods, applications, fertilization devices, etc., can solve problems such as difficult to intuitively and effectively determine the appropriate range of optimal nitrogen application rate, and achieve the effect of accurate nitrogen application rate

Inactive Publication Date: 2016-02-10
TOBACCO RES INST CHIN AGRI SCI ACAD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the conventional nitrogen dosage test design can only determine the appropriate interval of the optimal nitrogen dosage based on experience and test results, and it is difficult to determine the appropriate interval of the optimal nitrogen dosage intuitively and effectively.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A method for determining the optimal nitrogen fertilizer application rate for flue-cured tobacco. There is no control group, and five repetition groups are set up. Each repetition group uses 201 flue-cured tobacco plants. A nitrogen application rate is set for each flue-cured tobacco plant, and the nitrogen application rate for each flue-cured tobacco plant is continuously increased. , and ensure that the nitrogen, phosphorus and potassium ratio of each flue-cured tobacco is consistent, and the fertilization amount of the 201 flue-cured tobaccos is (a-2x) / hm 2 , (a-1.98x) / hm 2 , (a-1.96x) / hm 2 Increment in turn to (a+1.96x) / hm 2 , (a+1.98x) / hm 2 , (a+2x) / hm 2 , where a represents the conventional nitrogen dosage, and x represents the gradient; 8-12 days after topping, according to the yellowing of tobacco plants, the optimum range of nitrogen dosage is preliminarily determined visually; After harvesting and roasting, comprehensive analysis of the appearance quality,...

Embodiment 2

[0015] This embodiment is an existing method test example, as a comparative example.

[0016] Set up a pot experiment at the X City Experimental Station in XX County.

[0017] Variety of flue-cured tobacco: NC102; test fertilizer is special fertilizer for tobacco (N:P 2 o 5 :K 2 O=10:10:20).

[0018] Pot experiment; nitrogen dosage gradient is 30kg pure nitrogen / hm 2 ; CK: 15kg pure nitrogen / hm 2 ; T1: 45kg pure nitrogen / hm 2 ;T2: 75kg pure nitrogen / hm 2 ;T3: 105kg pure nitrogen / hm 2 ;T4: 135kg pure nitrogen / hm 2 , the ratio of nitrogen, phosphorus and potassium is 1:1:2.

[0019] test results

[0020] Statistical analysis of economic traits, main chemical components and sensory evaluation quality of 5 treated tobacco leaves yielded 75kg pure nitrogen / hm 2 Optimum, 105kg pure nitrogen / hm 2 The next two points, and then deduce the range of the optimal nitrogen rate is: 75kg pure nitrogen / hm 2 ~105kg pure nitrogen / hm 2 .

Embodiment 3

[0022] Potted experiments were also set up at the X City Experimental Station in XX County.

[0023] Variety of flue-cured tobacco: NC102; test fertilizer is special fertilizer for tobacco (N:P 2 o 5 :K 2 O=10:10:20).

[0024] The pot experiment was set as continuous treatment, and the nitrogen dosage was 0-135kg pure nitrogen / hm 2 , the ratio of nitrogen, phosphorus and potassium is 1:1:2, and the nitrogen dosage gradient is 0.6kg pure nitrogen / hm 2 . One flue-cured tobacco plant was transplanted in each pot, the pot was buried in the soil, the edge of the pot was 5 cm above the ground, the diameter of the pot was 40 cm, and the height was 45 cm. Pot test soil filling method: first fill in fine sand, then mix the soil with fertilizer, and finally fill in a layer of fine sand.

[0025] Observe the layered yellowing of the tobacco leaves in the tobacco plants. With the gradual increase of nitrogen application, the tobacco plants gradually change from defertilization and f...

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PUM

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Abstract

The invention discloses a method for determining the optimal nitrogen fertilizer application amount of flue-cured tobacco. No control groups are set, five repeating groups are set, 201 pieces of flue-cured tobacco are adopted in each repeating group, the nitrogen application amount is set for each piece of flue-cured tobacco, the nitrogen application amount of each piece of flue-cured tobacco is continuously increased, and the consistent nitrogen, phosphorus and potassium ratio of each piece of flue-cured tobacco is guaranteed; 8-12 days after topping, the suitable interval of the optimal nitrogen element application amount is visually and preliminaryly determined according to the good mature appearance condition of tobacco plants; the single flue-cured tobacco plant in normal good mature appearance is harvested and baked, the appearance quality, the main chemical component content and the sensory evaluation quality of baked tobacco leaves are comprehensively analyzed, the suitable nitrogen element application amount range which is preliminaryly obtained is adjusted, and therefore the optimal nitrogen application amount range can be finally determined. According to the normal layering good mature appearance condition of tobacco plants, and the appearance quality and the internal quality of the baked tobacco leaves, the suitable nitrogen element application amount range is visually and accurately determined; the suitable nitrogen element application amount range is obtained, not a certain nitrogen application level is obtained, and therefore the obtained suitable nitrogen element application amount is more accurate compared with an existing method.

Description

technical field [0001] The invention relates to a method for determining the optimum nitrogen fertilizer application rate of flue-cured tobacco, which belongs to the field of agricultural production. Background technique [0002] Fertilization is one of the important technical links in flue-cured tobacco planting. Among the three elements of nitrogen, phosphorus and potassium, appropriate application of phosphorus and potassium fertilizers generally does not have much adverse effect on the yield and quality of tobacco leaves, but nitrogen fertilizer is different. Due to the large differences in soil and climate conditions in various places, the physical and chemical properties of the soil are different, the amount of residual nitrogen in the previous crops is different, the annual rainfall is unevenly distributed, and the types and application methods of fertilizers are different. The absorption and utilization rate of nitrogen in the medium and nitrogen in the fertilizer i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01C21/00
Inventor 窦玉青程森唐宇卢晓华蔡宪杰张忠锋牛纪军朱志军付秋娟初晓鹏董维杰
Owner TOBACCO RES INST CHIN AGRI SCI ACAD
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