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Integrated management of sesbania azolla and urea nitrogen in lowland rice under a rice wheat cropping system



Integrated management of sesbania azolla and urea nitrogen in lowland rice under a rice wheat cropping system



Journal of Agricultural Science 113(2): 203-206



A two-year field experiment on a mollisol at Pantnagar [India] showed that organic sources of N gave generally higher rice yields than the equivalent split dressing of prilled urea (PU). In 1985/86, Sesbania green manuring (40 kg N/ha) and PU (40 kg N/ha) and, in 1986/87, Sesbania (40 kg N/ha) + Azolla (40 kg N/ha) gave significantly higher yields than a split application of 80 kg N/ha as PU. Yield increases were attributed to significant variations in panicles/m2, filled spikelets/panicle and nitrogen uptake by the crop. These components, and grain yield, were significantly correlated with wet soil NH+4-N, which was increased by organic manuring. Wheat grown after each rice crop showed significant residual effects of the different sources of N applied to rice.

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Accession: 007470931

Download citation: RISBibTeXText

DOI: 10.1017/s0021859600086779


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