362-18 Maize and Soybean Nutrition in Intensive Cropping Systems in Southern Russia.
See more from this Division: SSSA Division: Soil Fertility and Plant Nutrition
See more from this Session: Soil Fertility for Corn, Wheat, and Soybean
Abstract:
Field experiments with maize-soybean (chickpea since 2015) rotation were conducted on a common chernozem. The soil had a clay loam texture, high pH, and low OM content. Average initial contents of nitrateN (N03-N) were medium to "increased". Olsen P and exchangeable K (1 M ammonium acetate extractable) tests found P to be "increased", while K was high.
The highest average yield of maize of 6.37 t/ha was obtained through a local EI management including balanced application of NPK fertilizers, splitting the N rate, application of starter PK fertilizer, and Zn seed treatment. Its average improvement over FP was 9%. Maize responded only slightly to added N in both the EI and FP management systems. The average yield increase due to N was 6%. Adequate N03-N levels in the soil may explain this low response.
The highest average yield of soybean of 1.96 t/ha was also obtained through EI management including balanced application of NPK fertilizers, Mo seed treatment and inoculation (in the first season). The improvement over FP reached 25%. The yield response to additional N over the low N treatment, for both the EI and FP management, ranged from 6 to 7% and were not significant during all seasons. Improvements in seed protein were obtained with both EI and FP management treatments that provided extra N fertilizer.
See more from this Division: SSSA Division: Soil Fertility and Plant Nutrition
See more from this Session: Soil Fertility for Corn, Wheat, and Soybean