Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Effect of Water Management Practices on Rice Yield, Water Productivity and Water Savings Under Irrigated Rice Paddy Ecosystem

S. C. Barman
Department of Environmental Science, Bangladesh Agricultural University, Mymensingh-2202

M. A. Ali*
Department of Environmental Science, Bangladesh Agricultural University, Mymensingh-2202

H. J. Hiya
Department of Environmental Science, Bangladesh Agricultural University, Mymensingh-2202

K. R. Sarker
Department of Soil Science, Bangladesh Agricultural University, Mymensingh-2202

M. A. Sattar
Department of Environmental Science, Bangladesh Agricultural University, Mymensingh-2202

Abstract/ Executive Summary:

A field experiment was carried out during the Boro season 2013 to find out the effects of water management practices on rice yield performance and water productivity index at Old Brahmaputra flood plain paddy land, Muktagacha, Mymensingh. The experiment was laid out in randomized complete block design (RCBD) with six (6) irrigation treatments. Two treatments, T1 and T3 were kept under continuous standing water levels (10 cm and 5 cm respectively) while in treatment T5 irrigation water was supplied for 1st 3 weeks then followed mid season drain out and re-flooded at flowering stage. Three alternate wetting and drying irrigation treatments, T2, T4 and T6 were selected in which irrigation water was applied when water level dropped 20cm, 10cm and 15cm below ground level, respectively. All the irrigation treatments significantly affected the rice yield and yield contributing parameters. The study revealed that the highest grain yield (5950 kg ha-1) was found in treatment T5 which was identical with AWDI treatment T4 (5820 kg ha^-1) followed by AWDI treatment T6 (5460 kg ha^-1). On the contrary, rice yield of 3350 kg ha^-1, 4470 kg ha^-1 and 4810 kg ha^-1 were found in the treatment T1, T2 and T3, respectively. It was found that AWDI treatment T2 showed maximum water savings (15.1%) followed by T6 (11.3%), T4 (7.59%) and T5 (3.8%), however rice yield in the treatment T2 (4470 kg ha^-1) was significantly lower compared to T6, T4 and T5 treatment. Therefore, it may be inferred that treatment T4 (AWDI; irrigation when water level fell 10 cm from ground level), T5 (Irrigation for 1st 3 weeks, then mid-season drain out and re-flooding at flowering) and T6 (AWDI; irrigation when water level fell 15cm from ground level) would be the feasible choice for the water savings, higher rice yield as well as maximum water productivity index (0.478, 0.472 and 0.467, respectively) for sustaining rice farming during the dry Boro season in Bangladesh.

Keywords: AWDI, Productivity, Rice yield, Water savings

Location: Chechua, Muktagacha, Mymensingh.

Start Date: 10-01-2013

End Date: 00-04-2013

Program Area: Crop-Soil-Water Management

Commodity: Water management, Rice

Objectives:

To investigate the effects of alternate wetting and drying irrigation on rice yield, water productivity, soil properties and water savings under boro season field condition.

Methodology:

The field experiment was carried out at Chechua, Muktagacha, Mymensingh. The experiment was laid out in a randomized complete block design (RCBD) having 3 blocks and 6 irrigation treatments. The dimension of an experimental plot was 4.0 m x 2.5m. The plot size was selected based on the facilities available for rice production. The experimental field was prepared by a power tiller and a ladder. It was then fragmented into 3 major blocks. Each block was then divided into 6 experimental plots. Standard recommended doses or fertilizers were used in the experimental plots. Triple superphosphate (TSP), Muriate of potash (MoP), gypsum and zinc sulphate fertilizers were applied only once before transplanting, whereas urea was applied thrice after transplantation. Twenty one days old seedlings of BRRl dhan28 was transplanted in the field on 10th January, 2013. In this experiment, plots were equipped with a pipe irrigation system, along with water inlet and outlet devices which controlled timely irrigation and drainage. Some pieces of PVC pipes were used to measure the depletion of soil water in the field. The diameter of the PVC pipe was 7.5 cm. Different levels of irrigation were applied to determine the suitable one considering the rice growth and yield and water savings capacity. In each of the cases, the field was allowed to be dried up to a certain level. The depleted water table was observed from the pipes installed in the field. A wooden stick scale was used to measure the water level inside the pipe. The experimental treatments were T1 = 10 cm standing water maintained 1st 3 weeks, then kept 5cm throughout the growing season; T2 = Irrigation when water level in the pipe fell 20cm below the ground level; T3 = 5 cm standing water maintained throughout the growing season; T4 = Irrigation water when water level fell 10cm below ground level; T5 = Irrigation water for 1st 3 weeks, then mid-season drain out, re-flooding at flowering; T6 = Irrigation when water level in the pipe fell 15cm below the ground level. BRRl dhan 28 was harvested on 18 May 2013 and data on the rice yield and yield contributing parameters were taken before threshing the grains from the plant. Water saving percentage was calculated as follows: Water Savings (%) = (Water Supplied in Flooded Plot- Water Supplied in AWDI Plot)/Water Supplied in Flooded Plot x100 Water Productivity Index was calculated as the ratio of crop yield (kgha^-1) per unit water (mha^-3) supplied as defined by Jaafar et al. (2000). It includes irrigation, rainfall and antecedent soil moisture. Water productivity index (kg m^-3) = Grain Yield (Kg /ha) /Total Vol. of Water Supplied (M³/ha)

Source of Information: J. Environ. Sci. & Natural Resources, 9(2): 79-84, 2016 ISSN 1999-7361

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The alternate wetting and drying irrigation treatments significantly affected the rice yield and water productivity. The results revealed that the highest grain yield (5950 kg ha^-1) was found in the treatment T5, which was very close to the yield (5820 kg ha^-1) obtained in AWDI treatment T4 followed by AWDI treatment T6 (5460 kg ha^-1). In the present study, treatments T5, T4 and T6 appeared to produce the best output considering the yield of rice grain as well as water saving percentages compared to other treatments. It was also observed that plant height, number of panicles per hill, grain yield, harvest index and water productivity index were higher in AWDI plots (T4 and T6) and in treatment T5 plot compared to other treatments. Therefore, it may be inferred that practicing AWDI treatments T4 (irrigated when water level fell 10cm), T5 (Irrigation 1st 3 weeks with mid-season drain out and re-flooding at flowering) and T6 (irrigated when water level fell 15cm) would be the feasible choice for farmers to obtain optimum grain yield with higher water productivity index irrigation treatments.

Knowledge Management: Journal