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Moisture Stress and Different Rates of Nutrients on Growth and Yield of Rice

K. P Halder
Director (Administration and Common Service)
Bangladesh Rice Research Institute, Joydebpur, Gazipur

M. S Islam
Principal Scientific Officer
Bangladesh Rice Research Institute, Joydebpur, Gazipur

M. R Manir
Senior Scientific Officer
Farm Management Division, Bangladesh Rice Research Institute, Joydebpur, Gazipur

M. A Ali
Former Director (Administration and Common Service)
Bangladesh Rice Research Institute, Joydebpur, Gazipur

Abstract/ Executive Summary:

The experiment was conducted at the Bangladesh Rice Research Institute (BRRI) Gazipur farm during Boro 2003-04 seasons to observe the moisture stress effects in relation to nutrient rates on growth and yield of rice. The treatments were three moisture stresses (NS= Always saturated condition i.e. 1-2 cm standing water; VPS= Withholding water at the vegetative phase i.e. 15 days after transplanting (DAT) to maximum tillering stage; RPS=Withholding water at the reproductive phase i.e. PI to flowering stage) and three fertilizer doses (F0= No fertilizer; HD= Half of the optimum dose and OD= Optimum dose i.e. 120-60-40-10-2 kg ha^-1 of N, P₂O₅, K₂O, S and Zn respectively). The treatments were applied in high yielding variety BRRI dhan29. The result showed that irrespective of nutrient rates, drought stress decreased plant height, tiller number and shoot dry weight. Unstressed plants (NS) produced the highest grain yield (3.14 to 6.51 t ha^-1) followed by vegetative phase stressed (VPS) plants (2.73 to 4.50 t ha^-1). The reproductive phase stressed (RPS) plants produced the lowest grain yield (2.54 to 4.20 t ha^-1). Regardless of water stress, application of optimum dose (OD) of nutrients produced the highest grain yield followed by half dose (HD) of nutrients. No fertilizer treatment (F0) produced the lowest grain yield. Due to water stress, the highest grain yield reduction occurred in OD (22-32%) followed by HD (12-19%) and the lowest in F0 (4-15%).

Keywords: Rice, Moisture stress, Nutrients rates, Plant growth, Yield components

Location: BRRI farm Gazipur

Start Date: 00-00-2003

End Date: 00-00-2004

Program Area: Crop-Soil-Water Management

Commodity: Fertilizer and manures

Objectives:

To investigate the effect of moisture stress and different doses of nutrients on the growth, yield and yield components of rice.

Methodology:

The experiment was conducted at the BRRI farm Gazipur during Boro 2003-04 season. The treatments were three moisture stresses (NS= Always saturated condition i.e. 1-2 cm standing water; VPS= Withholding water at the vegetative phase i.e. 15 DAT to maximum tillering stage; RPS=Withholding water at the reproductive phase i.e. PI to flowering stage) and three fertilizer doses (F0= No fertilizer; HD= Half of the optimum dose and OD= Optimum dose i.e. 120-60-40-10-2 kg ha^-1 of N, P₂O₅, K₂O, S and Zn, respectively). The treatments were arranged in a randomized complete block design (Factorial) with three replications. BRRI dhan29 was used as tested variety. The unit plot size was 4m × 4m. Thirty-five-day-old seedling @ 3 seedlings per hill was transplanted. The plant height, tiller number per hill and plant samples were collected from 15 days after transplanting (DAT) i.e. from stress imposed to maturity of the crop with 28 days intervals. The sampling days were D1= 0 days after stress imposed (DASI), D2=28 DASI, D3=56 DASI, D4=84 DASI and D5=112 DASI. At the maturity of the crop, the grain yield was recorded from 5-m² area excluding the border rows and weight was adjusted at 14% moisture content. The collected data were analyzed by following a standard statistical procedure and the mean differences were adjusted by LSD method.

Source of Information: Bangladesh Rice j. 2018, 22 (2): 23-30

Article Link (Online Journal): DOI: https://doi.org/10.3329/brj.v22i2.44039

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Water stress decreased growth of the plant due to reduction of plant height and tiller number. When a higher dose of fertilizer was applied in stressed plant, there was a greater percentage of reduction of grain yield than the lower dose of fertilizer applied stressed plant. Therefore, if fertilizer is applied, proper water supply must be ensured, otherwise yield will be reduced drastically.

Knowledge Management: Journal