Acid-base regulator for tobacco planting and application of acid-base regulator

Abstract

The invention belongs to the technical field of tobacco planting, and discloses an acid-base regulator for tobacco planting and application thereof.The acid-base regulator for tobacco planting comprises a regulator A for improving the PH of soil and a regulator B. The regulator A comprises, by weight, 60%-65% of plant ash, 10%-20% of straw powder, 5%-10% of charcoal powder and 10%-15% of mountain sand; 0-5% of humus; and the regulator B comprises the following components in percentage by weight: 50-55% of calcium sulfate dihydrate, 20-30% of humic acid and 20-25% of sand tree sawdust. The problem that the PH value of flue-cured tobacco planting soil is obviously too low or too high is solved.

Description

Technical Field

[0001] This invention relates to the field of tobacco cultivation technology, specifically to an acid-base regulator for tobacco cultivation and its application. Background Technology

[0002] Yunnan is a major tobacco-producing province in China, and Yuxi is known as the "Hometown of Yunnan Tobacco." Yuxi City is an important quality-producing area for flue-cured tobacco in Yunnan. Large-scale flue-cured tobacco cultivation in Yuxi City has a history of about 40 years. In the past 40 years, the cultivation of vegetables and other cash crops has developed rapidly in Yuxi City. The continuous cropping of vegetables and flue-cured tobacco, along with the large amount of chemical fertilizers used for cash crops, has led to many soils in flue-cured tobacco fields having a pH level that deviates from the range required by flue-cured tobacco. Currently, there are large areas of flue-cured tobacco fields with significantly low or high pH values. Both excessively high and low soil pH will have adverse effects on flue-cured tobacco. Low pH will hinder nutrient absorption, inhibit root development, and reduce the nutrients available to plants; excessively high pH will easily lead to deficiencies in trace elements such as iron, manganese, zinc, and boron, affecting the normal growth of tobacco; and it will also cause soil compaction, which is not conducive to root expansion.

[0003] Therefore, there is an urgent need to develop an agent to regulate the pH of the soil used for flue-cured tobacco cultivation. Summary of the Invention

[0004] The present invention aims to provide an acid-base regulator for tobacco planting and its application. The present invention solves the problem of excessively low or high pH value in flue-cured tobacco planting soil.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A pH regulator for tobacco cultivation, comprising a regulator A for increasing soil pH and a regulator B for decreasing soil pH, wherein regulator A, by weight percentage, comprises: 60%-65% wood ash, 10%-20% straw powder, 5%-10% charcoal powder, 10%-15% mountain sand, and 0-5% humus; and regulator B, by weight percentage, comprises: 50%-55% calcium sulfate dihydrate, 20%-30% humic acid, and 20%-25% sawdust from sand trees.

[0007] Furthermore, the regulator A comprises, by weight percentage: 60% wood ash, 15% straw powder, 10% charcoal powder, and 15% mountain sand.

[0008] Furthermore, the regulator A comprises, by weight percentage: 65% wood ash, 15% straw powder, 5% charcoal powder, 5% humus, and 10% mountain sand.

[0009] Furthermore, the regulator B comprises, by weight percentage: 52% calcium sulfate dihydrate, 25% humic acid, and 23% sawdust from sand trees.

[0010] The application of acid-base regulators as described above in adjusting soil pH.

[0011] The beneficial effects of the technical solution are:

[0012] After applying regulator A of the present invention, the soil pH value can be increased. After applying regulator B of the present invention, the soil pH value can be decreased, and the increased pH value can be maintained stably for a long period of time. Furthermore, the raw materials used in the present invention are widely available and cost-effective. In addition, the application of the product is environmentally friendly to the soil and the agricultural products produced are safe. Detailed Implementation

[0013] The present invention will be further described in detail below with reference to the embodiments:

[0014] Example 1

[0015] A pH regulator for tobacco cultivation, comprising a soil pH regulator A, which comprises, by weight percentage: 60% wood ash, 15% straw powder, 10% charcoal powder, and 15% mountain sand.

[0016] Example 2

[0017] A pH regulator for tobacco cultivation, comprising regulator A for increasing soil pH, wherein regulator A comprises, by weight percentage: 65% wood ash, 15% straw powder, 5% charcoal powder, 5% humus, and 10% mountain sand.

[0018] Example 3

[0019] A pH regulator for tobacco cultivation, comprising a pH regulator B that increases soil pH, wherein the pH regulator B comprises, by weight percentage: 52% calcium sulfate dihydrate, 25% humic acid, and 23% sawdust from sand trees.

[0020] The acid-base regulators of Examples 1-3 were added as powder solids and mixed with soil. Experiments were conducted on various varieties of flue-cured tobacco using the acid-base regulators.

[0021] (1) The acid-base regulator described in Example 1 was used for the test.

[0022] Experimental materials: The test soil was collected from a flue-cured tobacco continuous cropping field in Yuxi City, Yunnan Province. The initial soil pH was 4.2-4.8, the organic matter content was 12.5 g / kg, and the available nitrogen content was 85 mg / kg. The test regulator A, by weight percentage, consisted of 60% wood ash, 15% straw powder, 10% charcoal powder, and 15% mountain sand. All raw materials were crushed and passed through a 2 mm sieve before use. The tested flue-cured tobacco variety was "Yunyan 87".

[0023] Experimental Design: The experiment consisted of three treatment groups and one control group, with each group replicated three times. The plot area was 15 m², arranged in a randomized block design. Treatment group 1: 750 kg / ha of plant growth regulator A was applied; Treatment group 2: 1125 kg / ha of plant growth regulator A was applied; Treatment group 3: 1500 kg / ha of plant growth regulator A was applied; Control group: No plant growth regulator was applied. The plant growth regulator was evenly mixed with the top 20 cm of soil 7 days before tobacco transplanting. Results: Soil samples from the 0-20 cm layer were collected at 30, 60, 180, and 360 days after application. Soil pH was measured using the potentiostatic method. Plant height, stem diameter, number of effective leaves, and yield per plant were measured at tobacco harvest. Soil pH changes showed that the soil pH in the control group was below 5.0 during the experimental period. Treatment group 1 showed a pH value that rose to 5.5 after 30 days of application, stabilized at 5.6 after 60 days, remained at 5.5 after 180 days, and was still at 5.4 after 360 days; Treatment group 2 showed a pH value that rose to 5.8 after 30 days of application, reached 5.9 after 60 days, remained at 5.8 after 180 days, and was at 5.7 after 360 days; Treatment group 3 showed a pH value that rose to 6.2 after 30 days of application, reached 6.3 after 60 days, remained at 6.2 after 180 days, and was at 6.1 after 360 days.

[0024] In terms of flue-cured tobacco growth indicators, treatment group 3 performed best, with plant height increasing by an average of 15-18 cm, stem diameter increasing by an average of 0.3-0.5 cm, number of effective leaves increasing by 2-3, and yield per plant increasing by 20% compared to the control group; treatment group 2 showed plant height increasing by 12-14 cm, stem diameter increasing by 0.2-0.4 cm, number of effective leaves increasing by 1-2, and yield per plant increasing by 18%; treatment group 1 was also better than the control group, with plant height increasing by 11-13 cm and yield per plant increasing by 15%, and the effect increased with the increase of application rate.

[0025] (2) The acid-base regulator described in Example 2 was used for the test.

[0026] Experimental materials: The test soil was collected from a flue-cured tobacco-vegetable rotation field in Yuxi City. The initial soil pH was 4-5, and the organic matter content was 10.2 g / kg. The test regulator A, by weight percentage, consisted of 65% wood ash, 15% straw powder, 5% charcoal powder, 5% humus, and 10% mountain sand. The raw material particle size was 1-3 mm. The tested flue-cured tobacco variety was "K326".

[0027] Experimental design: Two treatment groups and one control group were set up, with each group replicated three times. The plot area was 15 m². Treatment group 1: 900 kg of growth regulator A was applied per hectare; Treatment group 2: 1350 kg of growth regulator A was applied per hectare; The control group received no growth regulator. The growth regulator was applied 7 days before tobacco transplanting and mixed thoroughly by tilling.

[0028] Experimental Results: Soil pH values ​​and tobacco plant height, stem diameter, number of effective leaves, and yield per plant were measured at different stages. Soil pH monitoring showed that the control group had a pH value below 5.0. In treatment group 1, the pH value rose to 5.6 after 30 days of application, reached 5.7 after 60 days, 5.6 after 180 days, and 5.5 after 360 days. In treatment group 2, the pH value rose to 6.0 after 30 days of application, reached 6.1 after 60 days, 6.0 after 180 days, and 5.9 after 360 days. Regarding tobacco growth indicators, treatment group 2 performed better, with plant height increasing by 12-15 cm, stem diameter increasing by 0.2-0.4 cm, number of effective leaves increasing by 2-3, and yield per plant increasing by 18%. In treatment group 1, plant height increased by 8-10 cm, stem diameter increased by 0.2-0.3 cm, number of effective leaves increased by 1-2, and yield per plant increased by 15%. Tests showed that the heavy metal content in the cured tobacco leaves was below the national standard limit.

[0029] (3) The acid-base regulator described in Example 3 was used for the test.

[0030] Experimental materials: The test soil was collected from a high-pH flue-cured tobacco field in Tonghai County, Yuxi City. The initial soil pH was 7.1-7.6, and the available iron content was 3.2 mg / kg. The test regulator B, by weight percentage, consisted of 52% calcium sulfate dihydrate, 25% humic acid, and 23% sawdust from sand trees. The raw materials were crushed and passed through a 2 mm sieve. The tested flue-cured tobacco variety was "Yunyan 97".

[0031] Experimental design: Three treatment groups and one control group were set up, with each group replicated three times. The plot area was 20 m². Treatment group 1: 750 kg / ha of plant growth regulator B was applied; Treatment group 2: 1125 kg / ha of plant growth regulator B was applied; Treatment group 3: 1500 kg / ha of plant growth regulator B was applied; The control group received no plant growth regulator. The plant growth regulator was applied 7 days before tobacco transplanting and mixed thoroughly with the soil.

[0032] Experimental Results: Soil pH values ​​at different stages, as well as plant height, stem diameter, number of effective leaves, and yield per plant at harvest, were measured. Soil pH changes showed that the control group had a pH higher than 6.5. In treatment group 1, the pH decreased to 7.6 after 30 days of application, reached 7.5 after 60 days, 7.4 after 180 days, and 7.3 after 360 days; in treatment group 2, the pH decreased to 7.2 after 30 days of application, reached 7.1 after 60 days, 7.0 after 180 days, and 6.9 after 360 days; in treatment group 3, the pH decreased to 6.8 after 30 days of application, reached 6.7 after 60 days, 6.6 after 180 days, and 6.5 after 360 days. Regarding the growth indicators of flue-cured tobacco, treatment group 3 showed the most significant improvement, with plant height increasing by 11-15 cm, stem diameter increasing by 0.3-0.4 cm, the number of effective leaves increasing by 2-3, and yield per plant increasing by 21% compared to the control group. Treatment group 2 showed plant height increasing by 8-12 cm, stem diameter increasing by 0.2-0.3 cm, the number of effective leaves increasing by 2, and yield per plant increasing by 15%. Treatment group 1 showed plant height increasing by 5-7 cm, stem diameter increasing by 0.2-0.3 cm, the number of effective leaves increasing by 1-2, and yield per plant increasing by 10%. No micronutrient deficiency symptoms were observed in any of the treatment groups, while the control group showed obvious iron deficiency chlorosis.

[0033] Experimental results show that the pH regulators in the above embodiments can be widely used in various crops without causing harm or planting obstacles. The regulators in Examples 1 and 2 can increase the soil pH value, while the regulator in Example 3 can decrease the soil pH value and maintain a stable value for 1-2 years.

[0034] In summary, applying regulator A of the present invention can increase the soil pH value, while applying regulator B of the present invention can decrease the soil pH value and maintain a stable increase in pH value over a long period of time. Furthermore, the raw materials used in the present invention are widely available and cost-effective. In addition, the application of the product is environmentally friendly to the soil and the resulting agricultural products are safe.

[0035] The above descriptions are merely embodiments of the present invention, and common knowledge regarding specific technical solutions or characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An acid-base regulator for tobacco cultivation, characterized in that, The regulators include regulator A, which increases soil pH, and regulator B, which decreases soil pH. Regulator A, by weight percentage, comprises: 60%-65% wood ash, 10%-20% straw powder, 5%-10% charcoal powder, 10%-15% mountain sand, and 0-5% humus. Regulator B, by weight percentage, comprises: 50%-55% calcium sulfate dihydrate, 20%-30% humic acid, and 20%-25% sawdust from sand trees.

2. The acid-base regulator for tobacco cultivation according to claim 1, characterized in that: The regulator A, by weight percentage, comprises: 60% wood ash, 15% straw powder, 10% charcoal powder, and 15% mountain sand.

3. The acid-base regulator for tobacco cultivation according to claim 1, characterized in that: The regulator A, by weight percentage, comprises: 65% wood ash, 15% straw powder, 5% charcoal powder, 5% humus, and 10% mountain sand.

4. The acid-base regulator for tobacco cultivation according to claim 1, characterized in that: The regulator B, by weight percentage, comprises: 52% calcium sulfate dihydrate, 25% humic acid, and 23% sawdust from sand trees.

5. The application of the acid-base regulator as described in any one of claims 1-4 in adjusting soil pH.