Sources of nitrogen and methods of application for flooded rice: I. Comparison of two methods of applying slow release and standard fertilizer materials
2009
s. k. de datta | and j. c. moomaw | g. v. | simsiman
<jats:p>Field experiments with rice were conducted on a flooded soil comparing two standard fertilizers with N fertilizers with various release rates. For each of these fertilizer materials two methods of application were compared: broadcast and incorporated, and placement at 15 cm depth. The .slow release materials resulted in a lower grain yield than did fast or medium release rate or standard fertilizer materials. They released N too slowly during the early growth of rice to permit optimum plant growth and development.</jats:p><jats:p>Placement of 80 kg/ha N at 15 cm depth increased the plant N content at all stages of growth and significantly increased the grain yield compared with the broadcast-and-incorporated fertilizer treatment. The highest grain yield in the experiment (7701 kg/ha rough rice) was obtained from a medium release material, which was 88 % more efficient in increasing grain yield per unit of N when placed at 15 cm than when broadcast-and-incorporated.</jats:p><jats:p>The recovery of fertilizer N was 68% when deeply placed and 38 % when broadcast-andincorporated.</jats:p>
Show more [+] Less [-]Simsiman, 'Sources of nitrogen and methods of application for flooded rice. I. Comparison of two methods of applying slow-release and standard fertilizer materials', Journal of Agricultural Science 69, no. 2 (1967): 189-196.
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