Effect of green manures and urea on nitrogen mineralization in relation to growth of rice under Upper Brahmaputra Valley zone of Assam


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Authors

  • B DEKAMEDHI
  • D N MEDHI

Keywords:

green manure, exchangeable NH4- N, rice, N uptake

Abstract

 An experiment was conducted during 1995 and 1996 at Jorhat to study the nitrogen mieralization and growth of rice treated with green manures, viz Sesbania rqstrata L., Sesbania aculeata L. and urea. Nitrogen was applied @ 40 kg N/ha and 'Lachit' rice (Oryza satiya L.) was used as the test crop. Incorporation of green manure delayed the release of exchangeable NH4 ± N than that of urea. Addition of green manure and urea increased grain yield, straw yield and N uptake significantly than the control. More N was retained in the soil from green manure than from urea indicating higher residual effect of green manures.

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Author Biographies

  • B DEKAMEDHI
    Senior Scientist (Soils)
  • D N MEDHI
    Associate Professor, Department of Agronomy

Issue

Vol. 70 No. 12 (2000)

Section

Articles

License

The copyright of the articles published in The Indian Journal of Agricultural Sciences is vested with the Indian Council of Agricultural Research, which reserves the right to enter into any agreement with any organization in India or abroad, for reprography, photocopying, storage and dissemination of information. The Council has no objection to using the material, provided the information is not being utilized for commercial purposes and wherever the information is being used, proper credit is given to ICAR.

How to Cite

DEKAMEDHI, B., & MEDHI, D. N. (2013). Effect of green manures and urea on nitrogen mineralization in relation to growth of rice under Upper Brahmaputra Valley zone of Assam. The Indian Journal of Agricultural Sciences, 70(12). https://epubs.icar.org.in/index.php/IJAgS/article/view/28743