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

Estimation of Growing Degree Days and Solar Radiation Use Efficiency in Mustard and Wheat

Dr. Rina Rani Saha
Chief Scientific Officer (In Charge)
Plant Physiology Division, BARI, Jodebpur, Gazipur

Abstract/ Executive Summary:

Two varieties of mustard such as BARI Sarisha 15 and BARI Sarisha 16 and also two varieties of wheat such as BARI Gom 26 and BARI Gom 28 used as test crops. It was observed that leaf area index (LAI) increased with progression of growth duration up to 60 days and then declined. Absorption efficiency of photosynthetically active radiation (PAR) showed almost similar pattern with that of LAI. Dry matter accumulation of mustard and wheat varieties increased gradually up to maturity. A linear and identical relationship between total above ground dry matter and accumulative absorbed photosynthetically active radiation was found in both the mustard and wheat varieties. Radiation use efficiency of BARI Sarisha 15 was higher than that of BARI Sarisha 16 though yield was lower. In case of wheat varieties, BARI Gom 28 had lesser growth duration and absorbed lower amount of PAR but produced higher amount of biomass, greater radiation use efficiency and yielded more than that of BARI Gom 26. In requiring growing degree days from different developmental stages of mustard and wheat varieties a considerable variation was observed.

Keywords: Solar radiation, Growing degree, Mustard and Wheat

Location: Gazipur

Start Date: 00-00-0000

End Date: 00-00-0000

Program Area: Variety and Species

Non-commodity: Performance

Objectives:

i) To estimate and compare radiation use efficiency (RUE) and growing degree day between mustard and wheat

ii) To study the relationship of biomass, leaf area index (LAI) and absorbed photo synthetically active radiation (PRAa) of mustard and wheat

Methodology:

Two varieties of mustard such as BARI Sarisha 15 and BARI Sarisha 16 and also two varieties of wheat such as BARI Gom 26 and BARI Gom 28 used as test crops. Recommended production practices were followed. Data were recorded on days to emergence, 50% flowering, physiological maturity and maximum and minimum temperature, sun shine hour. Canopy light interception was measured with PAR Ceptometer (LP-80, AccuPAR, Decagon, USA) at different growth stages to calculate extinction coefficient. For determining the leaf area index, five plants were randomly selected in each plot and cut at ground level. Each sampling was done at 20 days interval up to 80 days after sowing and also at maturity. The green leaf portions were separated and the area of the leaves was measured immediately after collection of the plant with the help of an automatic leaf area meter (LI 3100, LI COR, USA). The samples collected for determining leaf area index were also used for recording above ground biomass production. For this purpose, these samples were oven dried at 80⁰C for 72 hours. Daily solar radiation was calculated from sun shine hour by using Weatherman of DSSAT 4.5 crop model and conversion of solar radiation to photosynthetic active radiation (PAR) was as the fraction of 0.5 of solar radiation. Radiation use efficiency (RUE) was estimated from the slope of the linear regression line of the above ground total dry matter and accumulative absorbed PAR.

Source of Information: Plant Physiology, Annual Research Report, 2013-2014

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Radiation use efficiency of BARI sarisha15 was higher than that of BARI sarisha16 although yield was lower than BARI sarisha16. In wheat varieties, BARI Gom 28 had lesser growth duration and absorbed lower amount of photosynthetically active radiation (PAR) but produced higher amount of biomass, greater radiation use efficiency and yielded more than that of BARI Gom 26. On the other hand, growing degree days (GDD) for different developmental stages were higher in BARI Sarisha16 than that of BARI Sarisha 15 and BARI Gom 26 required higher GDD during emergence to flowering than BARI Gom 28.

Knowledge Management: Report/Proceedings