Effect of crop rotation and fertilization on readily available phosphorus levels in chernozem
2006
Seremesic, S. (Faculty of Agriculture, Novi Sad (Serbia)), E-mail: [email protected] | Milosev, D. (Faculty of Agriculture, Novi Sad (Serbia)) | Cuvardic, M. (Faculty of Agriculture, Novi Sad (Serbia))
Effect of crop rotation and fertilization on soil levels of readily available P were studied in a long-term crop rotation trial at Rimski Sancevi, Serbia. The study treatments were as follows: fertilized three-field crop rotation (maize-soybean-wheat); fertilized two-field crop rotation (maize-wheat), fertilized monoculture of wheat; fertilized monoculture of maize; unfertilized three-field crop rotation (maize-soybean-wheat); and unfertilized two-field crop rotation (maize-wheat). The fertilized treatments were fertilized with organic and mineral NPK fertilizers until 1986. Since then, only N fertilizer has been applied, while P and K use was discontinued because of a very high presence of these elements in the soil. In the unfertilized treatments, no fertilizer has been used since the treatments were established in 1946/47. The unfertilized crop rotations have very low P levels (5-10 mg/100 g soil), while the P content of the fertilized ones is so high it is harmful (80-100 mg/100 g soil). Analysis of the study results revealed statistically significant differences among the various fertilization treatments and crop rotation.
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