Abstract
A pot experiment was conducted to compare the uptake and dry matter production potential of NH sup+inf4 and NO sup-inf3 and to study the effect of Baythroid, a contact poison for several insect pests of agricultural crops, on growth and N uptake of maize (Zea mays L.). Nitrogen was applied as (15NH4)2SO4, K15NO3, or 15NH4NO3 and in one treatment Baythroid was combined with 15NH4NO3. Source of N had, in general, a nonsignificant effect on dry matter and N yield, but uptake of NO sup-inf3 was significantly higher than that of NH sup+inf4 when both N sources were applied together. Substantial loss of N occurred from both the sources, with NH sup+inf4 showing greater losses. Baythroid was found to have a significant positive effect on dry matter yield of both root and shoot; N yield also increased significantly. Uptake of N from both the applied and native sources increased significantly in the presence of Baythroid and a substantial added nitrogen interaction (ANI) was determined. The positive effect of Baythroid was attributed to: (1) a prolonged availability of NH sup+inf4 due to inhibition of nitrification, (2) an increased availability of native soil N through enhanced mineralization, and (3) an enhanced root proliferation.
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Lodhi, A., Azam, F. & Malik, N.N. Growth and nitrogen nutrition of maize (Zea mays L.) in soil treated with the nitrification-inhibiting insecticide Baythroid. Biol Fertil Soils 23, 161–165 (1996). https://doi.org/10.1007/BF00336057
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DOI: https://doi.org/10.1007/BF00336057