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Tobacco seedling cultivation substrate capable of strengthening seedlings and reducing cadmium absorption and preparation method and use thereof

A seedling raising substrate and tobacco technology, applied in the field of agriculture, can solve the problems of reducing the chemical quality of tobacco leaves

Inactive Publication Date: 2019-01-11
CHINA TOBACCO CENTRAL SOUTH AGRICULTURAL EXPERIMENTAL STATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tobacco has a high accumulation characteristic of Cd in soil, soil Cd pollution not only inhibits the growth and development of tobacco, but also reduces the chemical quality of tobacco leaves

Method used

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  • Tobacco seedling cultivation substrate capable of strengthening seedlings and reducing cadmium absorption and preparation method and use thereof
  • Tobacco seedling cultivation substrate capable of strengthening seedlings and reducing cadmium absorption and preparation method and use thereof
  • Tobacco seedling cultivation substrate capable of strengthening seedlings and reducing cadmium absorption and preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: the preparation of tobacco seedling raising substrate

[0035] Cow dung is composted and decomposed and fermented, and then the decomposed and fermented products are used to breed earthworms. The cultivation of earthworms is carried out in PVC tanks (length*width*depth=1.6m*1.2m*0.3m): firstly, the cow dung that has been decomposed and fermented in the early stage Lay it in a PVC tank about 15cm thick, spray water according to the ratio of cow dung (air-dried weight): water (weight ratio) = 4:1, and then place about 6kg (fresh weight) of earthworms on the cow dung, in order to maintain a suitable content The amount of water, spray a small amount of water to the breeding tank every other week, after about 45 days of breeding (cow manure is basically completely eaten), the earthworms in the breeding tank are manually separated to obtain the vermicompost, and then the vermicompost is air-dried, and after 1- After the mm sieve, take the sieved material as eart...

Embodiment 2

[0036] Embodiment 2: the nutrient solution preparation in the tobacco floating nursery pond

[0037] The preparation of the nutrient solution in the tobacco seedling floating pond is based on the characteristics of tobacco’s nutritional needs, using ammonium nitrate, potassium dihydrogen phosphate, ferrous sulfate heptahydrate, copper sulfate pentahydrate, zinc sulfate heptahydrate, potassium molybdate, monohydrate Dissolve manganese sulfate, magnesium sulfate, boric acid, sulfuric acid, etc. in distilled water to prepare N,P 2 o 5 , K 2 O, Fe, B, Cu, Zn, Mo, Mn, S and Mg concentrations (mg / L) are respectively 30, 15, 30, 0.10, 0.05, 0.02, 0.02, 0.01, 0.05, 0.05, 0.05 nutrient solution , with 0.1mol / L of H 2 SO 4 Or KOH solution to adjust the pH value of the nutrient solution to between 6.0-6.5. In this example, the preparation of the nutrient solution is based on the nutritional requirements of tobacco and the antagonistic characteristics of Zn to Cd.

Embodiment 3

[0038] Embodiment 3: Effect experiment of different substrates on tobacco seedling cultivation

[0039] (1) The pretreatment method of the tobacco seedling raising substrate of the present invention is as follows: a) the vermicompost particles of the prepared 1-mm sieve and the attapulgite powder of the 200 mesh sieve are respectively according to the weight ratio (w / w) to be 6:4 (T1), 7:3 (T2) and 8:2 (T3) were mixed in a ratio, fully stirred evenly, and three kinds of mixtures of vermicompost and attapulgite powder with different proportions were obtained, that is, three kinds of seedling substrates (T1, T2 and T3 ); b) according to the funnel method (funnel method is as follows) recorded in "Soil Agricultural Chemical Analysis Method" (Lu Rukun, Beijing: China Agricultural Science and Technology Press, 2000), measure the maximum amount of vermicompost and attapulgite powder mixture Water holding capacity (%); c) according to the maximum water holding capacity result measure...

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Abstract

The invention discloses a tobacco seedling cultivation substrate capable of strengthening seedlings and reducing cadmium absorption and a preparation method and a use thereof. The substrate includes earthworm excrement and attapulgite powder. The preparation method includes the step of mixing earthworm excrement and attapulgite powder at a weight ratio of 10:1 to 1:1. The preparation of the earthworm excrement includes the following steps: composting and fermenting cow dung to form a product of composting and fermenting; breeding earthworms with the product of composting and fermenting; artificially separating the earthworms; obtaining earthworm excrement; air-drying the earthworm excrement to obtain dry earthworm excrement; and sieving the dry earthworm excrement. The preparation of the attapulgite powder includes the following steps: preliminarily grinding attapulgite by a mechanical method; grinding the attapulgite by a ball milling method; and sieving the attapulgite. The tobacco seedling cultivation substrate prepared by the method can significantly increase the weight of tobacco leaves and reduce the content of metal cadmium in tobacco leaves.

Description

technical field [0001] The invention belongs to the field of agriculture, and relates to tobacco safety production that improves the production of high-quality tobacco leaves and reduces the hazards of heavy metal cadmium (Cd) in tobacco leaves, and specifically relates to a tobacco seedling-growing substrate capable of strengthening seedlings and reducing the absorption of Cd by tobacco leaves, as well as its preparation and application technology . Background technique [0002] Seedling cultivation and transplanting is a tobacco cultivation method widely carried out in countries all over the world, and seedling cultivation occupies an important position in tobacco production. Cultivating enough strong seedlings is the prerequisite for completing the tobacco production plan, and it is also the basis for obtaining high-quality and high-yield tobacco leaves. At present, the planting of tobacco usually adopts nutrient pots for floating seedlings and then transplanting. Since ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G24/20A01G24/15A01G24/10A01G22/45
CPCA01G22/45A01G24/10A01G24/15A01G24/20
Inventor 段淑辉周志成陈世宝王萌杨佳蒴
Owner CHINA TOBACCO CENTRAL SOUTH AGRICULTURAL EXPERIMENTAL STATION
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