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Effect of Age of Seedlings at Staggered Transplanting and Nutrient Management on Yield Performance of Aromatic Fine Rice (cv. BRRI Dhan38)

A. Roy
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M.A.R. Sarkar
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

S.K. Paul*
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during July to December 2014 with a view to finding out the effect of age of seedlings at staggered transplanting and nutrient management on growth and yield of aromatic fine grained rice (cv. BRRI dhan38). The experiment consisted of three ages of seedlings (30, 45 and 60 day-old) at staggered transplanting and six nutrient managements viz. control (no nutrients), recommended dose of inorganic fertilizers, 50% of recommended dose of inorganic fertilizers + cowdung @ 5 t ha^-1, 75% of recommended dose of inorganic fertilizers + cowdung @ 5 t ha^-1, 50% of recommended dose of inorganic fertilizers + poultry manure @ 2.5 t ha^-1 and 75% of recommended dose of inorganic fertilizers + poultry manure @ 2.5 t ha^-1. The experiment was laid out in a randomized complete block design with three replications. The effect of age of seedlings at staggered transplanting, nutrient management and their interactions were significant on crop characters, yield components and yield of aromatic fine rice. The tallest plant was recorded due to transplanting 30 day old seedlings fertilized with 75% of recommended dose of inorganic fertilizers + poultry manure @ 2.5 t ha^-1. The highest leaf area index (6.55), number of total tillers hill^-1 (12.56), number of effective tillers hill^-1 (8.54), panicle length (24.07cm) and number of grains panicle^-1 (141.3) were recorded in 30-day old seedlings fertilized with 75% of recommended dose of inorganic fertilizers + poultry manure @ 2.5 t ha^-1 while the lowest values were recorded in 60-day old seedling with control. In case of sterile spikelets panicle^-1, 60-day old seedlings with control treatment showed the highest value (30.94). The highest grain (3.85 t ha^-1) and straw (5.29 t ha^-1) yields were obtained in 30-day old seedlings fertilized with 75% of recommended dose of inorganic fertilizers + poultry manure @ 2.5 t ha^-1. Therefore, 30-day old seedlings fertilized with 75% of recommended dose of inorganic fertilizers + poultry manure @ 2.5 t ha^-1 appeared as the promising technique for appreciable growth and grain yield of aromatic fine grained rice (cv. BRRI dhan38).

Keywords: Aromatic fine grained rice, Seedlings, Staggered transplanting, Nutrient, Yield

Location: At the agronomy field laboratory of Bangladesh Agricultural University (BAU), Mymensingh

Start Date: 00-07-2014

End Date: 00-12-2014

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

The present study was carried out to delineate the effect of age of seedlings at staggered transplanting and nutrient management on the yield performance of aromatic fine rice (cv. BRRI dhan38).

Methodology:

The experiment was conducted at the agronomy field laboratory of Bangladesh Agricultural University (BAU), Mymensingh during July to December 2014 to study the effect of age of seedlings at staggered transplanting and nutrient management on the growth and yield of aromatic fine grained rice (cv. BRRI dhan38). The experimental field is located at 24°75’ N latitude and 90°50’E longitude at an altitude of 18m. The experimental field belongs to the Old Brahmaputra Floodplain (AEZ-9). The soil of the experimental land belongs to the Sonatala series of non-calcareous dark grey floodplain. The land was medium high, silt loam in texture and more or less neutral in reaction (pH 6.5), and low in organic matter (1.29%). Aromatic rice variety BRRI dhan38 was used as plant material. The experiment consisted of three age of seedling at staggered planting viz. 30- (A1), 45- (A2) and 60- day old seedlings (A3) and four nutrient managements viz. Control (no nutrients) (F0), Recommended dose of inorganic fertilizers (i.e. 150, 97, 70, 60 and 12 kg Urea, TSP, MoP, Gypsum and ZnSO₄, respectively ha^-1) (F2), 50% of recommended dose of inorganic fertilizers + cowdung @ 5 t ha^-1 (F2), 75% of recommended dose of inorganic fertilizers + cowdung @ 5 t ha^-1 (F3), 50% of recommended dose of inorganic fertilizers + poultry manure @ 2.5 t ha^-1 (F4) and 75% of recommended dose of inorganic fertilizers + poultry manure @ 2.5 t ha^-1 (F5). The experiment was laid out in a randomized complete block design with three replications. The size of unit plot was 4.0 m × 2.5 m. The distances between blocks and plots were 1 m and 75 cm, respectively. Sprouted seeds were sown in the prepared wet nursery bed on 23 June 2014. Proper care was taken to raise the seedlings in the nursery bed. Weeds were removed and irrigation was given in the nursery bed as and when necessary. The experimental land was prepared by a power tiller 10 days before transplanting. It was then ploughed well with the help of country plough to make the soil nearly ready for transplanting. Weeds and stubble were removed and the field was then leveled by laddering. The experimental field was then divided into unit plots which were spaded one day before transplanting for incorporating the basal fertilizers. The specified amount of cowdung, poultry manure, triple superphosphate, muriate of potash, gypsum and zinc sulphate were applied at final land preparation. Urea was applied in three equal splits, at 15, 35 and 50 days after transplanting (DAT). Seedlings were transplanted on the well puddled experimental plots following staggering of transplanting on 23 July, 8 August and 23 August 2014, maintaining the spacing of 25 cm × 15 cm using three seedlings hill^-1. Intercultural operations were done for ensuring and maintaining the vigorous growth of the crop. Intensive care was taken throughout the growing season. The leaf area was measured by an automatic leaf area meter. LAI was calculated as the ratio of total leaf area and total ground area of the sample as described by Hunt (1978) and Yoshida (1981). LAI = LA/P, Where, LA = Total leaf area of the leaves of all sampled plants (cm²), P= Area of the ground surface covered by the plant (cm²). Maturity of the crop was determined when 90% of the grain became golden yellow in color. Five hills (excluding border hills and central 1 m² area) were selected randomly from each plot and uprooted prior to harvest to record data on crop characters and yield contributing characters. After sampling, central one square meter area was harvested to record the data on yield. The crop was harvested on 24 December 2014 with sickle at proper maturity. Then the crop was threshed, cleaned and sun dried to record the grain yield per square meter. The grain yield was adjusted to 14% moisture content. Straws were sun dried to record the straw yield per square meter. Grain and straw yields were then converted to t ha^-1. The recorded data were analyzed following analysis of variance technique and mean differences were adjudged by Duncan’s Multiple Range Test (Gomez and Gomez, 1984).

Source of Information: SAARC J. Agri., 16(1): 49-59 (2018)

Article Link (Online Journal): DOI: http://dx.doi.org/10.3329/sja.v16i1.37422

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

It can be concluded that 30-day seedlings fertilized with 75% inorganic fertilizer + poultry manure @ 2.5 t ha^-1may be used for better performance compared to other combinations in respect of grain yield of aromatic fine rice (cv. BRRI dhan38). In case of staggered transplanting, 60-day old seedlings fertilized with 75% inorganic fertilizer + poultry manure @ 2.5 t ha^-1 appeared as the promising technique to obtain an appreciable grain yield of 3.39 t ha^-1 under late transplanted condition

Knowledge Management: Journal