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Effect of nitrogen fixing water fern Azolla and different forms of urea application on the growth, nitrogen uptake and grain yield of rice crop



Effect of nitrogen fixing water fern Azolla and different forms of urea application on the growth, nitrogen uptake and grain yield of rice crop



Acta Agronomica Hungarica 42(1-2): 69-76



Two field experiments were conducted during the late wet season and early wet season to study the effect of Azolla inoculation as dual crop with different forms of urea on rice. The different forms of urea included were prilled urea, carbofuran blended urea, neem cake blended urea, KCl blended urea and gypsum blended urea. Inoculation of Azolla as dual crop with carbofuran blended urea, neem cake blended urea and KCl blended urea have shown positive effect on plant height, tiller and straw yield of rice varieties IR-50 and Co-43. Prilled urea blended with carbofuran or KCl or neem cake have increased the nitrogen uptake at early stages of crop growth and also in grain and straw when applied with Azolla than the individual application. Individually and in combination with different forms of urea, Azolla inoculation also recorded more total nitrogen accumulation in soil during both seasons.

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