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Method for potassium extraction and fertilization of tobacco leaves of Yunyan85 (flue-cured tobacco variety)

A potash fertilizer and Yunyan technology, which is applied to the field of Yunyan 85 potassium extraction and fertilization, can solve the problems of uncertainty in the application amount and application time of potassium fertilizer, restricting the quality of tobacco leaves, and low potassium content in tobacco leaves, so as to ensure yield, reduce waste, and improve potassium content. amount of effect

Inactive Publication Date: 2014-02-12
SICHUAN AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Judging from the current status quo, the application amount and application time of potassium fertilizer are uncertain
According to the investigation of the Liangshan tobacco area, a large amount of potassium fertilizer is applied all year round when planting flue-cured tobacco locally, and most of the topdressing potassium fertilizer is completed within 30 days after transplanting. The value is only about 1.8%, which seriously limits the further improvement of tobacco leaf quality

Method used

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  • Method for potassium extraction and fertilization of tobacco leaves of Yunyan85 (flue-cured tobacco variety)
  • Method for potassium extraction and fertilization of tobacco leaves of Yunyan85 (flue-cured tobacco variety)
  • Method for potassium extraction and fertilization of tobacco leaves of Yunyan85 (flue-cured tobacco variety)

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for extracting potassium from Yunyan 85 and fertilizing, the method comprising the steps of:

[0028] (1) Tobacco fields are plowed and ridged to dig nests, and the nest spacing is 120×50cm;

[0029] (2) When transplanting, apply 600 kg of calcium magnesium phosphate fertilizer, 210 kg of ammonium nitrate and 192-216 kg of potassium sulfate per hectare around the tobacco seedlings, take a small amount of soil to cover the fertilizer, and then water; ring application is a tobacco fertilization method , specifically fertilizing around the ridge.

[0030] (3) Before the flue-cured tobacco enters the flourishing period, the first topdressing is carried out at about 50 days of growth, and 90 kg of ammonium nitrate and 68 kg of potassium sulfate are applied around the roots per hectare;

[0031] (4) When more than 50% of the flue-cured tobacco in the flue-cured tobacco buds are topped, and the growth is about 80 days, the second topdressing is carried out after topp...

Embodiment 2

[0033] Gradient experiment:

[0034] Soil culture experiment set up 4 potassium treatments (K 2 O): 0 (PK0), 90 mg·kg -1 (PK90), 180 mg·kg -1 (PK180) and 270 mg·kg -1 (PK270) Soil, of which 180-270 mg·kg -1 Equivalent to field consumption, 180-270 kg·hm -2 It is the local conventional potassium fertilizer application rate in Liangshan Prefecture. Each treatment was repeated 30 times, and the amount of nitrogen and phosphorus fertilizers was applied to N90mg and P per kilogram of soil. 2 o 5 90mg. The experiment was carried out in a net room with rainproof facilities in the teaching and research farm of Sichuan Agricultural University in 2011. Air-dry the soil and mix it evenly, put it into 10L plastic buckets, each bucket contains 15kg of soil, and mix all the phosphorus fertilizer, 70% nitrogen fertilizer and 70% potassium fertilizer into the soil in the form of water solution as the base fertilizer one week before transplanting, and the remaining nitrogen and potass...

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Abstract

The invention belongs to the technical field of flue-cured tobacco cultivation and in particular relates to a method for potassium extraction and fertilization of Yunyan85 (flue-cured tobacco variety). The method is characterized by comprising the following steps of applying a potassic fertilizer to Yunyan; applying a certain amount of potassic base fertilizer to tobacco leaves when the tobacco leaves are grown; and topdressing the potassic fertilizer to flue-cured tobaccos before the flue-cured tobaccos enter into a fast growing period and after more than 50% of the flue-cured tobaccos bud for topping, wherein the application amount of a potassic base fertilizer is 60%-70% of the total application weight of the potassic fertilizer, the application amount of the topdressed potassic fertilizer before entering the fast growing period is 15%-20%, and the application amount of the topdressed potassic fertilizer is 15%-20% after more than 50% of the flue-cured tobaccos bud for topping. According to the method, the fertilization period and the additional fertilization period and amount are accurate, the waste of the potassic fertilizer can be reduced, the potassium content of the tobacco leaves can be improved while guaranteeing yield. The collected tobacco leaves are analyzed, and the potassium content of the tobacco leaves is measured to be 3.13%, which is higher than the standard that the potassium content of high-quality tobacco leaves is more than or equal to 2%.

Description

technical field [0001] The invention belongs to the technical field of flue-cured tobacco cultivation, and in particular relates to a method for extracting potassium and fertilizing Yunyan 85. [0002] Background technique [0003] Yunyan 85 flue-cured tobacco belongs to Dicotyledonous Phyloflowers Solanaceae, Nicotiana genus, an annual herb plant, and is a variety bred by crossing K326 and Yunyan 2. It has been planted in our country for many years. However, in recent years, continuous cropping and excessive application of chemical fertilizers have led to a decrease in the oil content of the roasted tobacco leaves, a decrease in the amount of aroma, a decrease in the quality of the aroma, and ultimately a decline in the quality of the tobacco leaves. [0004] One aspect of the decline in the quality of Yunyan 85 is that the potassium content in the tobacco leaves cannot keep up. Therefore, in recent years, in order to increase the potassium content in the tobacco leaves, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01C21/00A01G1/00
Inventor 李廷轩张锡洲李静郑子成王永东余海英刘涛陈光登
Owner SICHUAN AGRI UNIV
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