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Effect of Seedling Age and Water Management on the Performance of Boro Rice (oryza Sativa L.) Variety BRRI Dhan28

M. S. Ali
Department of Crop Physiology and Ecology, Hajee Mohammad Danesh Science and Technology University,Dinajpur-5200, Bangladesh

M. A. Hasan
Department of Crop Physiology and Ecology, Hajee Mohammad Danesh Science and Technology University,Dinajpur-5200, Bangladesh

S. Sikder
Department of Crop Physiology and Ecology, Hajee Mohammad Danesh Science and Technology University,Dinajpur-5200, Bangladesh

M. R. Islam
Department of Crop Physiology and Ecology, Hajee Mohammad Danesh Science and Technology University,Dinajpur-5200, Bangladesh

M. H. R. Hafiz
Department of Crop Physiology and Ecology, Hajee Mohammad Danesh Science and Technology University,Dinajpur-5200, Bangladesh

Abstract/ Executive Summary:

A field experiment was conducted at the research farm of Crop Physiology and Ecology Department, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh during November 2010 to May 2011 to find out the effect of seedlings age and water management on tillering behavior, growth dynamics, yield and yield contributing characters of BRRI dhan28. The experiment was laid out in two factors randomized complete block design with four replications taking two seedlings age i.e. 15 and 30-d-old seedlings at transplanting and two water management practices viz. continuous flooding and intermittent irrigation. Fifteen-d-old seedlings provided greater ability of tiller production, dry matter accumulation and more leaf area than those of 30-d-old seedlings but the ability was influenced more with intermittent irrigation than continuous flooding. Transplanting of younger seedlings provided more effective tillers hill^-1, filled grains panicle^-1, thousand grain weight and finally grain yield than those of the older one but the younger seedlings interacted with intermittent irrigation significantly to explore all of these parameters. Fifteen-d-old seedlings of took shorter time to be matured than 30-d-old seedlings in both continuous flooded and intermittent irrigated condition. Again the crop matured 2 days earlier in intermittent irrigated plots than continuous flooded plots for both 15 and 30-d-old seedlings. Finally it may be concluded that transplanting of younger seedlings in combination with intermittent irrigation performed the best in tiller production, growth dynamics, yield and yield contributing characters.

Keywords: Seedlings age, Intermittent irrigation, Growth, Yield, Rice

Location: Crop Physiology and Ecology Department, Hajee Mohammad Danesh Science and Technology University, Dinajpur

Start Date: 00-11-2010

End Date: 00-05-2011

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

To determine the effect of seedlings age and water management on tillering behavior, growth dynamics, yield and yield contributing characters of BRRI dhan28.

Methodology:

The experiment was set up at the research farm of Crop Physiology and Ecology Department, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh at 25⁰39' N latitude and 88⁰41' E longitudes during November 2010 to May 2011. The experiment was laid out in a two factors factorial randomized complete block design i.e. Factor A: Seedlings age: 15 and 30-d-old seedlings and Factor B: Water management: Continuous flooding (3 to 5 cm water was kept throughout the growing period by checking water level every 24-hour) and intermittent irrigation (intermittent irrigation treatment consisted of providing light irrigation to keep the soil moist. After panicle initiation, a thin layer (1 to 2 cm) of water was maintained in this treatment and the field was completely drained 10 to 15 days before harvest). Water treatments were started one week after transplanting when the transplanting shock had abated. The total number of plots was 16 and the unit plots size was 12 m² (4m × 3m) having a plots to plots and block to block distance of 1.0 and 2.0 m, respectively. Fertilizer was applied at the rate of 140-35-100- 25-3.5 kg ha^-1 N, P, K, S, and Zn in the form of urea, triple supper phosphate, muriate of potash, gypsum and zinc sulphate, respectively. The 15 and 30-d-old seedlings of rice (Variety- BRRI dhan28) were transplanted on 12.12.2010 as per treatment design having 20 cm × 20 cm spacing. Three healthy seedlings were transplanted per hill. Intercultural operations were done as per requirement. At 45 days after transplanting (DAT) and at anthesis, three hills were selected randomly from two peripheral line rather than boarder line to collect data on tillers hill^-1, leaf area index (LAI) and dry matter hill^-1. Leaf area was measured using leaf area meter (Model: CI 202, USA) and dry matter hill^-1 was obtained by drying the collected hills in an electric oven (Model- E28# 03-54639, Binder, Germany) at 70ºC for 72 hours and weighing them in an electrical balance (Model- AND EK- 300 i). Plant height, number of tillers hill^-1 at 45 DAT, number of tillers, effective tillers and panicles hill^-1 during harvesting, panicle length and number of filled and unfilled grains of panicle^-1, grain yield and straw yield were recorded properly. The data were analyzed by partitioning the total variance by using MSTAT program. The treatment means were compared using Duncan’s Multiple Range Test (DMRT at 5% level of significance.

Source of Information: The Agriculturists 11(2): 28-37 (2013) ISSN 2304-7321 (Online), ISSN 1729-5211 (Print), A Scientific Journal of Krishi Foundation

Article Link (Online Journal): http://banglajol.info/index.php/AGRIC/article/view/17484/12260

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

From the overall results it may be concluded that transplanting of younger seedlings produced more productive tillers hill^-1 and filled grains panicle^-1 to increase grain yield. Intermittent irrigation was suitable for exploring the physiological potentials of rice seedlings on effective tillers for increasing grain yield.

Knowledge Management: Journal