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Articles by M.H. Mian
Total Records ( 2 ) for M.H. Mian
  Shamima Akhter , M.H. Mian , M.A. Kader and S.A. Begum
  A suitable combination of Azolla and urea-N was investigated for cultivation of rice (cv. BRRI Dhan 29). For this purpose an attempt was made to apply 30, 40, 50, 60 and 70% of the recommended doses of urea in 2 or 3 splits along with incorporation of one layer of Azolla grown from 0.2 kg m-2 inoculum. Two separate treatments of applying 100% of the recommended dose of urea in 3-splits (without Azolla) and no application of N at all from either urea or Azolla were included. Azolla covered the surface area in 13 days after inoculation at 7 DAT and reached the maximum growth in 19 days producing 14.0 to 18.3 t ha-1 fresh biomass containing 20.7 to 26.4 kg N ha-1. Incorporation of one layer of Azolla at 30 DAT plus application of 50, 60 and 70 kg N ha-1 in 3 splits constituted the application of 72.7, 81.6 and 91.1 kg N ha-1 that produced 5.58, 6.00 and 6.02 t ha-1 grain yields which were statistically similar to each other but the latter two were statistically superior to the grain yield of 5.40 t ha-1 produced by conventional recommended practice. Total uptake of N, P and S by the rice plants (grain+straw) were increased significantly due to incorporation of Azolla. Incorporation of one layer of Azolla plus application of 60% of urea-N appeared as the best combination in this study.
  Rehana Banu , M.H. Mian , M. Jahiruddin and M.A. Hasan
  A field experiment was carried out at the Bangladesh Agricultural University Farm, Mymensingh, Bangladesh during Boro season of 2000 to evaluate the comparative effect between one or two layers of incorporated Azolla biomass from 0.2 and 0.1 kg m‾2 inoculum with 50 kg N ha-1 as urea and the recommended dose of N (100 kg ha-1) on the yield and NPS uptake of BRRI Dhan 29. All the treatments were tried in two different plant spacings i.e., S1: 25-25×15 cm and S2: 35-15×15 cm. The highest grain yield of 4.43 t ha-1 produced by two incorporations of Azolla @ 0.2 kg m‾2 inoculum with 50 kg N ha-1as urea, which differed significantly from 4.06 t ha-1yield produced by 100 kg N ha-1 as urea (the recommended dose). But the yield of 3.88 t ha-1produced by twice incorporation of Azolla @ 0.1 kg m‾2 inoculum with 50 kg N ha-1 as urea and the yield from one incorporation of Azolla @ 0.1 and 0.2 kg m‾2 inoculum plus 50 kg N ha-1 as urea (3.65 and 3.91 t ha-1, respectively) did not differ statistically with that of 100 kg N ha-1as urea. The lowest grain yield of 2.26 t ha-1 was recorded from the control. The nitrogen, phosphorus and sulfur (NPS) uptake in grain and straw increased significantly by about 40-84, 45.3-109 and 41-87%, respectively, due to incorporation of Azolla over control. The difference between two plant spacings was not significant. Interaction effect between plant spacing and Azolla-urea treatments also did not exhibit any significant variation.
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