CN112314141A

CN112314141A - Fertilizing method for effectively reducing sulfur content of flue-cured tobacco

Info

Publication number: CN112314141A
Application number: CN202011283157.1A
Authority: CN
Inventors: 崔权仁; 周本国; 竟丽丽; 许大凤; 武文明; 姜超强
Original assignee: INSTITUTE OF TOBACCO ANHUI ACADEMY OF AGRICULTURAL SCIENCES
Current assignee: INSTITUTE OF TOBACCO ANHUI ACADEMY OF AGRICULTURAL SCIENCES
Priority date: 2020-11-17
Filing date: 2020-11-17
Publication date: 2021-02-05

Abstract

The invention provides a fertilizing method for effectively reducing the sulfur content of flue-cured tobacco, potassium sulfate is used as a base fertilizer, and the potassium sulfate is applied into soil 15 days before transplantation, ridging and film covering are carried out for waiting for planting. The fertilizing method can effectively reduce the sulfur content in the upper leaves, the middle leaves or the lower leaves of the flue-cured tobacco and can improve the potassium content of the flue-cured tobacco.

Description

Fertilizing method for effectively reducing sulfur content of flue-cured tobacco

Technical Field

The invention belongs to the field of tobacco planting, and particularly relates to a fertilizing method for effectively reducing sulfur content of flue-cured tobacco.

Background

Tobacco (Nicotianatabacum) is a plant of the dicotyledonous class, order tracheales, family Solanaceae (Solanaceae), genus Nicotiana (Nicotiana). The tobacco is a favorite economic crop taking leaves as a harvest object, the requirement on quality is strict, wherein potassium is an important quality element of the tobacco and has important influence on the smoking quality of the tobacco, the higher the potassium content of the tobacco is, the better the combustibility is, and the improvement of the combustibility is also an important technical means for reducing harm and reducing tar, so that the improvement of the potassium content of the tobacco is of great significance to the tobacco production. On the other hand, the tobacco is a plant which needs more sulfur, the yield of the tobacco leaves is obviously reduced due to insufficient sulfur, and the combustibility of the tobacco leaves is poor even if the tobacco leaves are flamed out due to overhigh sulfur content. At present, the potassium content of flue-cured tobacco in China is not high on the whole, and in the production of flue-cured tobacco, potassium sulfate is applied as the most direct and effective measure for improving the potassium content of tobacco leaves. However, long-term dressing of potash fertilizer (K2SO4) results in accumulation of sulfur content in the soil and also increases the sulfur content in tobacco leaves. The method provides a reference basis for the production of high-quality flue-cured tobacco by researching a fertilization technology for effectively reducing the sulfur content of upper leaves of the flue-cured tobacco under the condition of not changing the sulfur application amount

Disclosure of Invention

The invention belongs to the field of tobacco planting, and particularly relates to a fertilizing method for effectively reducing sulfur content of flue-cured tobacco. The specific technical scheme is as follows:

a fertilizing method for effectively reducing the sulfur content of flue-cured tobacco uses potassium sulfate as a base fertilizer, and the potassium sulfate is applied into soil 15 days before transplantation and is subjected to ridging and film mulching for later planting.

The fertilizing method can effectively reduce the sulfur content in the upper leaves, the middle leaves or the lower leaves of the flue-cured tobaccos. In particular to the reduction of the sulfur content in the upper leaves of flue-cured tobacco.

The application amount of the potassium sulfate in the fertilizing method is 7.5-15kg/667m². In particular, the application amount of the potassium sulfate is 10kg/667m²。

The invention provides application of potassium sulfate in reducing sulfur content of flue-cured tobacco and improving potassium content of flue-cured tobacco, which is characterized in that the potassium sulfate is used as a base fertilizer, is applied into soil 15 days before transplantation, and is subjected to ridging and film mulching to be planted.

Compared with the prior art, the invention has the following beneficial effects:

1. the potassium sulfate is used as a base fertilizer, and the sulfur content in the upper leaves, the middle leaves or the lower leaves of the flue-cured tobaccos can be effectively reduced by applying the potassium sulfate into soil 15 days before transplanting. 2. The fertilizing method of the invention reduces the sulfur content, and does not reduce the potassium content or even improve the potassium content. 3. The fertilizing method of the invention can effectively improve tobacco varieties.

Detailed Description

The invention will be better understood from the following examples. However, those skilled in the art will readily appreciate that the description of the embodiments is only for illustrating the present invention and should not be taken as limiting the invention as detailed in the claims.

Example 1 Effect of different methods of application of Potassium sulfate on the Sulfur content of flue-cured tobacco

Test varieties and test sites: yunyan 97; the soil fertility of the test field is moderate, the illumination is sufficient, and the drainage is good.

The test method comprises the following steps: the test was carried out under the same conditions of N, P, K total application level (10 kg/667m potassium sulfate application rate in each treatment plot)²) And 5 treatments are set according to the application time of the base fertilizer potassium sulfate. The method adopts random block arrangement and repeats for 3 times, the row spacing of tobacco planted in each cell is 1.2m multiplied by 0.5m, and 90 tobacco plants are planted in each cell. The application times of the potassium sulfate for each treatment are shown in table 1.

The test method comprises the following steps: tobacco leaf grades are graded according to the "GB 2635-92 flue-cured tobacco standard", wherein each set of tobacco leaf samples comprises 3 grades of the lower leaf (X2F), the middle leaf (C3F), and the upper leaf (B2F). 1.5kg of tobacco leaves were taken for each sample. And drying and crushing the tobacco leaf sample, and screening the tobacco leaf sample with a sieve with the aperture of 0.3mm to prepare a sample to be measured. The sulfur content of the tobacco leaves is measured by a barium sulfate turbidimetry method, and the potassium content of the tobacco leaves is measured by a flame photometry method.

And (3) test results:

TABLE 1 Effect of different application methods on the Sulfur content of flue-cured tobacco

As can be seen from table 1, the distribution of sulfur in different parts of the tobacco leaf is roughly upper leaf > middle leaf > lower leaf. The application time of the base fertilizer potassium sulfate has obvious difference on the influence of the sulfur content in the tobacco leaves, and the sulfur content in the tobacco leaves at the upper, middle and lower parts of the tobacco plant is obviously increased along with the delay of the application time; potassium sulfate is applied 0d before transplanting, the sulfur content of upper leaves exceeds the highest limit of sulfur requirement of high-quality tobacco by 0.70%, and the result of a fertilization time test set in the test shows that: and (3) applying potassium sulfate as a base fertilizer 15 days before transplanting, wherein the sulfur contents of the tobacco leaves at the upper, middle and lower parts of the test tobacco plant are respectively 0.63%, 0.55% and 0.42%, which are lower than the highest sulfur content upper limit of the high-quality tobacco, and are within 0.30% -0.70% of the sulfur content range required by the high-quality tobacco, so that the test tobacco belongs to the high-quality tobacco.

TABLE 2 Effect of different application methods on the Potassium content of flue-cured tobacco

Treatment of	B2F(％)
		1	1.57
2	1.74
		3	2.09
4	1.88
		5	1.71

As can be seen from Table 2, the application time of potassium sulfate had a significant effect on the K content in the upper tobacco leaves; the potassium content of the flue-cured tobacco in the treatment 3 is 2.09 percent and is higher than that of other treatment groups.

The foregoing is only a preferred embodiment of the present invention, and it will be apparent to those skilled in the art that modifications may be made without departing from the invention as claimed in the invention and these modifications are within the scope of the invention.

Claims

1. A fertilization method for effectively reducing the sulfur content of flue-cured tobacco is characterized in that potassium sulfate is used as a base fertilizer, and is applied into soil 15 days before transplantation, and ridging and film covering are carried out for waiting for planting.

2. The fertilization method of claim 1, wherein the sulfur content of the upper, middle, or lower leaves of flue-cured tobacco is effectively reduced.

3. The fertilization method of claim 2, wherein the sulfur content in upper leaves of flue-cured tobacco is effectively reduced.

4. Fertilizing method as claimed in any of the claims 1-3, characterized in that the potassium sulphate is applied in an amount of 7.5-15kg/667m²。

5. Fertilizing method as claimed in claim 4, characterized in that the potassium sulphate is applied in an amount of 10kg/667m²。

6. The application of potassium sulfate in reducing the sulfur content of flue-cured tobacco and increasing the potassium content of flue-cured tobacco is characterized in that the potassium sulfate is used as a base fertilizer, and is applied to soil 15 days before transplantation, and ridging and film covering are carried out for waiting for planting.

7. Use according to claim 7, which is effective in reducing the sulphur content in the upper leaves of flue-cured tobacco.

8. Use according to claim 6, characterized in that potassium sulfate is applied in an amount of 10kg/667m²。