The effect of microorganisms, organic residues and calcium salts on the formation of soil aggregates
Keywords:Microorganisms, Soil aggregates
A set of laboratory experiments were conducted, the aim of which was to compare the effect of the interaction between different levels of poultry waste (0, 5, 1,3%) with the same levels of cow waste and different levels of calcium salts (0, 750, 1500) ppm Ca For each of the calcium nitrate, calcium carbonate and calcium chloride and their interactions on the formation of soil aggregates, which is represented by the weighted average diameter formed after two months of incubation in sterile and inoculated with types of different genera of fungi: Rhizopus nigricans, Penicillium chrysogenum, Asperigllus niger and the bacteria Rhizobium trifoli i , Bacillus subtilis, Azotobacter Chroococcum
The results showed that the inoculation of the soil with types of different species of fungi and bacteria led to different increases in the average weighted diameter compared to the uninoculated soil, and that the fungi are more effective than the bacteria, and also it was found that the type and level of addition of organic waste had an impact on the average diameter. The weighted of the aggregations and that it increases with the increase of the quantities added and that the effect of poultry waste was greater than the effect of the waste of cows, and the results showed that the type and level of addition of calcium salts had an effect on the average weighted diameter and that it increases with the increase of the quantities added and that the effect of calcium nitrate salt was more effective.
- Baver, L. D., W. H. Gardener and W. R. Gardener, 1972, Soil Physics. 3rd. , John Wiley and sone. Inc. New York, Chap 5, P. 176-229.
- Sabey, R. J., 1949, "The relationship between microognism and soil aggregation", J. Can. Microbial 3: P. 236-254.
-Tisdall, J.M. and J. M. Oades, 1982, "organic matter and water-stable aggregates in soil", J. Soil Sci 3: P. 141-163.
- Greenland, D. J. , 1965, "Soil aggregate stability", Soil Fertilizer, 18: P. 647-664.
- Jackson, M. L. , 1958, Soil Chemical Analysis, Prentic-Hall Inc. Englewood, New Jersey.
- Black, C. A., 1965, Methods of Soil Analysis. part2, chemcil and microbiological properties, Amer. soc. of Agronomy, Inc. Madison, Wisconsin USA.
- Brenner, J. M. , 1965, "Total nitrogen", Methods of Soil Analysis, V.2, P. 141-149.
- Richards, L. A., 1954, "Diagnosis and improvement of saline and alkaline soil", Hand Book No. 60, US Dept. of Agric.
- Black, C.A., 1965, "Methods of soil analysis, Agron. Mono 9 parts (1 and 2)", Amer, Soc. Agron. madison, wisconson.
Martin, J.P., 1956, "use of acid, rose bengal and streptomycin in the plate method for Estimating soil fungi", Soil Sci., 69, P. 215-232.
- Aspiaras, R.B, O.N. Allen, G. Chesters and R.F. Harris, 1971, "Chemicaland and physical stability of microbially stabilized aggregates", Soil Sci. Soc. of Amer. proc. , 35, P. 283-286.
- Susan, M. Forster, 1979, "Microbial aggregationof sand in one embrye duen system N." Biol and Biochem, 11, P. 537-541.
- Chester, G. , O. J. Attoe and O. N. Allen, 1957, Soil, " Aggregation in relation to various soil constituents", Soil Sci. Amer. proc , 2, P. 272-277.
- Chaney Kand, R. S. Swift, 1984, "The influence of organic matter on aggregate stability in some British soils", J. of Soil Sci., 35, P. 223-230.
- Mazurak, A. P. , L. Chesnin and A. Amic Thijeel, 1977, "Effect of Beet cattle manurs on water-stability of soil aggregates", Soil Sci. Soc. Amer proc. , 41, P. 613-615.
-El-Sibaei, M. A., 1967, "Soil aggregation and its effect on some physical, chemical and biological characteristics of Egyptian alluvial", MSC Thesis, Fac. of Agric, Cahiro University
-Skinner, F. A., 1979, "Rothamsted stuies of soil structure VII. The effect of incubation on soil aggregates stability", J. Soil Sic., 30, P. 473-481.
Copyright (c) 1997 Omer Ali Fattah
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.