Mst. Sarmin Akter Ranu
Department of Agricultural Botany, Sher-e-Bangla Agricultural University (SAU), Dhaka-1207, Bangladesh
Md. Shoriful Islam
Department of Agricultural Botany, Sher-e-Bangla Agricultural University (SAU), Dhaka-1207, Bangladesh
Md. Moinul Haque
Department of Agricultural Botany, Sher-e-Bangla Agricultural University (SAU), Dhaka-1207, Bangladesh
Mahbuba Siddika
Department of Agricultural Chemistry, Sher-e-Bangla Agricultural University (SAU), Dhaka- 1207, Bangladesh
Md. Mostafizer Rahman
Department of Agricultural Botany, Sher-e-Bangla Agricultural University (SAU), Dhaka-1207, Bangladesh
Growth stimulator, Hybrid rice, Yield
Sher- e-Bangla Agricultural University, Sher-e-Bangla Nagar, and Dhaka, Bangladesh
Crop-Soil-Water Management
The experiment was carried out on the farm of Sher- e-Bangla Agricultural University, Sher-e-Bangla Nagar, and Dhaka, Bangladesh. The soil of the experimental field is silt loam in texture belonging to the ago-ecological zone of Modhupur Tract (AEZ-28). In the present study, two high yielding rice varieties BRRI hybrid dhan3 and BRRI dhAN29 were used as plant materials. This experiment consists two factors: 1) Rice varieties: BRRI hybrid dhan3 and BRRI dhan29. 2) PGS and fertilizer management: Recommended fertilizer dose (T1), Recommended fertilizer dose + Akota + Global(T2), Recommended fertilizer dose + Akota + Global + Calsol (T3), Recommended fertilizer dose + Akota + Global + Magic Growth (T4), Recommended fertilizer dose + Akota + Global + Calsol + Magic Growth (T5). Layout and land preparation of the experiment The experimental design was laid out in a Randomized Complete Block Design (RCBD) with two factors and three replicates for each treatment. The experiment was arranged in a Randomized Complete Block Design (RBCD) having PGS and fertilizer management in the main plots and varieties in the sub-plot. The total numbers of unit plots were 30. The size of unit plot was 3.0 m x 1.5 m. There were 10 treatment combinations. The distances between plot to plot and replication to replication were 0.5 m and 1m respectively. Fertilizer application Cow-dung was used as decomposed organic matter @ 5.0 ton /hectare before final land preparation. The recommended doses of chemical fertilizer were applied as Urea, TSP, MOP, Gypsum, and Zinc at the rate of 220, 165, 180, 70, 10 kg ha-1. The whole amount of all the fertilizers except urea were applied at the time of final land preparation and thoroughly incorporated with soil with the help of a spade. Half of the rest two third of urea was applied after 20 DAT and the rest amount of urea was applied at 45 DAT. Seed treatment and sowing Seeds were treated with Bavistin at the rate of 0.2% to 0.3% of seed weight. Seeds were kept in water bucket for 24 hours and then it was kept tightly in gunny bags. The seeds started sprouting after 48 hours and were sown after 72 hours. As per BRRI recommendation seedbed was prepared with 1 m wide adding nutrients as per the requirements of soil. Seeds were sown in the seed bed on 20 December, 2016 in order to transplant the seedlings in the main field. The plot selected for the experiment was opened in the first week of 24 January 2017 with a power tiller, and was exposed to the sun for a week, after which the land was harrowed, ploughed and cross- ploughed several times followed by laddering to obtain a good tilt. Weeds and stubble were removed, and finally obtained a desirable tilt of soil for transplanting of seedlings. The nursery bed was made wet by application of water one day before uprooting the seedlings. The seedlings were uprooted on January 25, 2017 without causing much mechanical injury to the roots. The seedlings were transplanted in the main field on 25 the January, 2017 with a spacing 15 cm from hill to hill and 20 cm from row to row. Intercultural operations Some intercultural operations are irrigation and drainage, gap filling, weeding, top dressing, spraying of insecticides and fungicides, protection of crops from other pests. Harvesting The rice plant was harvested depending upon the maturity of plant and harvesting was done manually from each plot. The harvested crop of each plot was bundled separately, properly tagged and brought to threshing floor. Enough care was taken for harvesting, threshing and also cleaning of rice seed. Fresh weight of grain and straw were recorded plot wise. The grains were cleaned and finally the weight was adjusted to a moisture content of 12%. The straw Was sun dried and the yields of grain and straw plot-1 Were recorded and converted to t ha-1. Data collection The following data were collected during the study period: effective tiller (%) hill-1, panicles hill-1, panicle length, filled grain panicle-1, Total grains panicle-1, Filled grain (%), 1000 grains weight, grain yield, straw yield, biological yield, harvest index (%) Statistical analysis All the data collected on different parameters were statistically analyzed following the analysis of variance (ANOVA) technique using MSTAT-C computer package program and the mean differences were adjudged by Least Significant Difference (LSD) test at 5 % level of significance (Gomez and Gomez, 1984).
International Journal of Biosciences, Vol. 16, No. 1, p. 93-106, 2020
Journal