[Qualitative differences of organic fertilizers of different genesis and their influence on the efficiency of crop rotation]
2000
Tsekhanovich, Y. | Shaidak, L. | Krasnoberskaya, V. | Ochkovskaya, L. | Matyushevskaya, T. (Institut for Problems of Natural resources Use and Ecology, National Acad.of Sciences of Belarus, Minsk (Belarus)
Content and quality of soil humus is much influenced by organic fertilizers serving as a source of organic and mineral substances needed for nutrition of agricultural plants. They annually replace up to 40% of mineral fertilizers. The differences in quality of soil humus depend, in particular, on genesis of organic fertilizers but qualitative differences of these organic fertilizers were not examined yet. The ability of ground to fertility depends not only on quantity of humus, but also on its quality. Study of CO2 isolation dependence on humidity amd sapropel type has shown that for all sapropel types increase of intensity of CO2 isolation was characteristic at composting. The greatest speed of its isolation was displayed at sapropel humidity above 50%. Natural structure of organic fertilizers shows, that the content of common nitrogen at sapropels changes in 1,5 time, at peat in a smaller degree (1,1 time). The lighthydrolising nitrogen of sapropels varied in 2,5 times, peat in 1,1 time. Ash content of sapropels differed in 3,5 times and exceeded ash of peat in 1,5...4,1 times. The efficiency of crop rotation depend on the contents of lighthydrolising nitrogen, that is connected with genesis of organic fertilizers. Spent analysis of the amino acids structure of organic fertilizers has enabled to differentiate their genetic peculiarities, has shown essential difference between kinds of peat and sapropel
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