Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2003.10.15Brassica rapa) Cultivation Due to Incorporation of
Water Hyacinth Residues into the System]]>WidjajantoDidik WisnuTerumasa Honmura Nobufumi Miyauchi 1200361Nitrogen derived (Ndev) from water hyacinth (WH) residues and recovered (Nrec) in
Komatsuna (Brassica rapa L.) was measured to evaluate the effect of different amounts
of water hyacinth residues (0, 30, 45, 60 and 100%) added during komatsuna cultivation
on the performance of the crop and amount of N released from WH residues into the
system. There were no significant differences on dry matter production among treatments
both in the 1st and 2nd sampling. N yield of Komatsuna decreased as the amounts of
added WH residues increased in the 1st sampling but no significant differences were
observed in N yield among treatments in the 2nd sampling. The Ndev from WH residues
was significantly increased as amounts of added WH residues increased. In contrast,
there were no significant differences found in Nrec from Komatsuna both in the 1st and
2nd sampling. In conclusion different quantities of added WH residues influenced the
performance of Komatsuna, and the N dynamics in the soil-Komatsuna systems. The
combination of 30% WH residues: 70% ammonium sulphate seems to be the most
appropriate ratio that may be applied in the field.]]>Azam, F., F.W. Simmons and R.L. Mulvaney,19932517871792Azam, F.,200215459Barrachlough, D.,199729101108Bol, R., W. Amelung, C. Friedrich and N. Ostle,20003213371343Contantinides, M. and J.H. Fownes,1994264955Harris, G.H., O.B. Hesterman, E.A. Paul and R.R. Janke,199486910915Hauck, R.D. and J.M. Bremner,197628219266Hood, R.C., N. Goran, K.M. Aigner and G.A. Hardarson,1999208259270Jordan, D., R.R. Bruce and D.C. Coleman,199621271276Jenkinson, D.S., R.H. Fox and J.H. Rayner,198536425444Joedodibroto, T., L.S. Widyanto and M. Soerjani,1983212932Kuzyakov, Y., H. Ehrensberger and K. Stahr,20003214851498Matsumoto, S., N. Ae and M. Yamagata,199945269278Matsushita, K., N. Miyauchi and S. Yamamuro,200015N-labeled nitrogen from co-compost made from cattle manure and chemical fertilizer in a paddy field.]]>46355363Morris, R.A., R.E. Furoc and M.A. Dizon,198678413416Norman, R.J., J.T. Glimour and R.B. Wells,19905413511356Paul, E.A.,198476275285Schenk, M.K.,199822185223Van Veen, J.A., J.N. Ladd and M. Amato,198514C(U)] glucose and [N] (NH4)2SO4 under different moisture regimes.]]>17747756Vestgarden, L.S.,2001Pinus sylvestris L.) needle litter decomposition: Effects of internal and external nitrogen.]]>33465474Widjajanto, D.W., K. Matsushita, T. Honmura and N. Miyauch,2001410751077Wisnu Widjajanto, D., H. Terumasa and M. Nobufumi,20025740743Yaacob, O. and G.J. Blair,198057237248Anonymous,1996pp: 1-62pp: 1-62Amanda, J.A.,20002000Oki, Y. and K. Une,19941994pp: 96100Henry, C., D. Sullivan, R. Rynk, K. Dorsey and C. Cogger,1999pp: 1-60pp: 1-60Bremner, J.M.,19651965pp: 1179-1237pp: 1179-1237