| The total amount of potassium resources is about 11.95 billion tons, potash reserves of457 million tons, only 2.6% of the world, on the basis of water soluble potassium resources potash resources can be divided into water soluble and insoluble potassium mineral based on,water soluble potassium resources reserves in our country are very few, but not soluble potassium ore resources were very rich whose reserves were more than 100 billion tons.Although the insoluble potassium mineral resources reserves is huge, the insoluble potassium ore resources are not developed and utilized well because of technical and cost issues,therefore it is is a top priority and imperative to speed up the development of comprehensive utilization of insoluble potassium rock and study the extraction of potassium in potassium rock new technology. Coal gangue is the solid waste in the process of coal mining and the large accumulation of coal gangue pollute the environment, but Coal gangue contains a large number of elements which can make crops grow, and it is nutritionally and complete to mixe the coal gangue into potassium mineral. Therefore, using bacteria deal with the mixed minerals compound fertilizer mixed mineral to transform the insoluble in mineral nitrogen,phosphorus and potassium into can be absorbed by crops using alkaline hydrolysis nitrogen,effective phosphorus and available potassium to make microbial compound fertilizer, which can not only improve the utilization rate of potash and alleviate shortage of fertilizer in our country, but also make coal gangue resource recycling and reduce the coal gangue on the pollution of the environment.In order to, potassium ore and gangue used in the experiment were mineral composition determination, and bacillus megaterium(ACCC10011) and silicate bacteria(GY03)physicochemical properties were tested to determine the of the experimental method. The paper explored that bacillus megaterium(ACCC10011) and silicate bacteria(GY03) effected on potassium ore and gangue dopants preparation of fertilizer, and the factors which wase the the ore particle size, the ore proportion, the inoculation amount, p H of the system, incubation time and oscillation obviously influenced the preparation of fertilizer. It was based on the optimum condition of the single factor experiment such as the incubation time, the ore proportion, inoculating quantity, p H and the particle size of potassium ore and gangue to design the orthogonal experimental, the L16(4) 5 orthogonal table was designed by the factors which had obvious effected, such as the incubation time, inoculating quantity, the ore proportion, p H and the particle size of potassium ore and gangue to conduct orthogonal test to investigate the correlation between the preparation factors of fertilizer and determine the optimum conditions for preparing fertilizer.It turns out that the preparation of fertilizer by bacillus megaterium(ACCC10011) of the content of rapidly-available potassium, available phosphate and effective nitrogen was 1200mg·kg-1、 27.81 mg·kg-1and 263.34mg·kg-1, and the rapidly-available potassium, available phosphate and effective nitrogen content respectively increased 1.94 times, 21.90 times and10.55 times when the potash and coal gangue were 200 mesh, ratio of 3:1, the inoculation quantity of 9.2×1014-2.32×1015cfu/g, p H 6.0, time for 4 days. It turns out that the preparation of fertilizer by silicate bacteria(GY03) of the rapidly-available potassium, available phosphate and effective nitrogen was 800 mg?kg-1、44.06 mg?kg-1、63.76 mg?kg-1, and the the content of rapidly-available potassium, available phosphate and effective nitrogen content respectively increased 1.29 times, 37.66 times and 2.30 times, when the potash and coal gangue were 200 mesh, ratio of 4:1, the inoculation quantity of 3.92×1015-3.96×1016cfu/g, p H 7.0, time for 12 days. It turns out that the preparation of fertilizer by two mixed strains of rapidly-available potassium, available phosphate and effective nitrogen content was 1300 mg·kg-1、 85.49mg·kg-1、155.23 mg·kg-1, and the the rapidly-available potassium, available phosphate and effective nitrogen content respectively increased 2.10 times, 73.07 times and 5.60 times when the potash and coal gangue were 200 mesh, the potash and coal gangue ratio of 4:1, the mixing ratio of bacillus megaterium and silicate bacteria of 4:1, the inoculation quantity of8.28×1014-1.18×1016cfu/g, p H 7.0, time for 10 days.Using bacillus megaterium(ACCC10011) and silicate bacteria(GY03) dissociate the dopant of potassium ore and gangue which are rich in nutrient substance to make microbial compound fertilizer which can greatly improve the soil fertility and alleviate the shortage of fertilizer in our country, which can provide new ideas on the study of using potassium ore preparation fertilize in China and provide a new way of coal gangue waste recycling. This method has simple operation, easy to get raw materials, low energy consumption, small pollution to the environment and other advantages and conforms the national policy of energy conservation and emissions reduction, meanwhile it has a good industrial development prospects and clean and is an important direction of clean and low carbon development of insoluble potassium mineral resources. |
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