Special marine biological fertilizer for tobacco as well as preparation method and application of fertilizer
A technology of marine organisms and special fertilizers, applied in fertilization methods, applications, inorganic fertilizers, etc., to achieve the effects of improving the quality of tobacco leaves, enhancing the ability of disease resistance and promoting growth, and having a good market application prospect
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Embodiment 1
[0025] 1. Extraction process of exopolysaccharide of Bacillus floraceus SJ
[0026] Take the Bacillus japonica SJ strain (preserved in the General Microorganism Center of China Microbiological Culture Collection Management Committee, the preservation number is: CGMCC No.7571), the colony shape is round, with neat edges, 4-6mm in diameter, and white mucus. Under laboratory conditions, it has obvious inhibitory effect on tobacco fusarium, tobacco red spot disease, tobacco black shank and other fungal diseases, and tobacco virus disease (TMV).
[0027] Preparation of seed culture solution: Inoculate the slant of the strain on the seed medium, the seed medium is: peptone 5-10g, beef extract 1-3g, sodium chloride 1-5g, ferric chloride 0.05-0.3g, distilled water 1000ml, pH6. 8~7.4. Cultivate at a temperature of 30-35° C. and a rotational speed of 170 rpm for 18-24 hours to obtain a seed culture solution.
[0028] Fermentation production: the seed culture solution is inoculated int...
Embodiment 2
[0034] Example 2, exopolysaccharides inhibiting effect on TMV
[0035]Inhibitory effect of extracellular polysaccharides on TMV: Take the extracellular polysaccharides of the strain SJ, dilute them 100 times, 500 times, 1000 times, 2000 times, mix them with 40 times the same volume of TMV virus juice for 15 minutes, inoculate Sansheng NN cigarettes, and Sterile water mixed with an equal volume of TMV was used as a control to detect its scab inhibition rate.
[0036] Table 1 Inhibitory effect of crude polysaccharide extracted from strain LJ-2 on TMV
[0037]
Embodiment 3
[0038] Embodiment 3, enteromorpha polysaccharide water retention, adsorption heavy metal ion experiment
[0039] 1) Determination of water retention of Enteromorpha polysaccharides
[0040] The water retention capacity of Enteromorpha polysaccharides was determined by calculating the evaporation rate of soil water. Take a cube with a length, width, and height of 10 cm and a volume of 1 decimeter as a container. The soil is ordinary loess. After drying at 105°C for 4 hours to constant weight, fill it into the container and compact it, and record the soil mass (Ms) Take tap water as contrast, make soil fully absorb water, write down used tap water quality (Mw); Respectively with the enteromorpha polysaccharide polysaccharide solution of 1 / 100,000 (A), 1 / 10,000 (B) concentration as experimental object, will The soil and exopolysaccharide solution of the same quality as the control were filled into empty containers, and placed at a constant temperature of 30°C for 3 to 15 days, r...
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