The Influence of Winter Wheat Continuous Cropping and Fertilization on the Crop Yields and Microbial Soil Diversity
The possibilities of the elimination of continuous cropping negative implications on the grain yield and microbial soil diversity were investigated. A stationary field experiment was established on Luvi-Haplic Chernozem. Statistically higher grain yield was found in the variant with mineral fertilization and straw and organic fertiliser Veget® incorporation (5.58 t.ha−1) compared with the variant with mineral fertilization only (4.87 t.ha−1) and with the variant with mineral fertilization and straw incorporation (4.90 t.ha−1). Statistically higher straw yield was found in the variant with mineral fertilization and straw and organic fertiliser Veget® incorporation (6.21 t.ha−1) compared with the variant with mineral fertilization only (4.41 t.ha−1). By cultivar Ebi, the grain yield was significantly higher in comparison to the cultivar Petrana. The lowest metabolic diversity of microbial communities and their respiration activity was found out in the variant with mineral fertilizer. On the other hand, the increase of functional diversity of microorganisms, their respiration activity and the number of cultivable bacteria was found in the variant with mineral fertilization and straw incorporation as well as in the variant with mineral fertilization and straw and organic fertiliser Veget® incorporation.
Keywordscontinuous cropping winter wheat grain yield yield formation components microbial soil diversity
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