International Journal of Biometeorology

, Volume 32, Issue 2, pp 81–86 | Cite as

Prediction of evapotranspiration and grain yield of rice (Oryza sativa L. cv Thriveni) in a humid tropical climate

  • A. S. Rao
  • D. Alexander
Original Articles

Summary

In a humid tropical climate at Pattambi (10° 48′ N, 76° 12′ E), the evapotranspiration (ET) rates of rice (Oryza sativa L. cv. Thriveni) were 2.8–5.7 mm/day during the first crop season (May–September) and 6.2–9.1 mm/day during the second crop season (September–January). The crop was grown at the Station in the irrigated lowlands on sandy soils with average yields of 3025 and 2925 kg/ha in the first and second cropping seasons, respectively. The seasonal ET, water requirements, water use efficiency and field water use efficiency of the crop were 400 mm, 1150 mm, 7.56 and 2.63 kg/ha per mm in the first crop season and 650 mm, 1500 mm, 4.50 and 1.95 kg/ha per millimetre in the second crop season. Using the reference crop ET computed by Blaney-Criddle, Radiation, and Penman methods and measured evaporation from class A pan, Colorado and GGI 3000 pans, the crop coefficients were worked out. Correlations between weather parameters and the biomass of rice were obtained. The grain yield (Y, in kg/ha) of the crop was predicted using the equationY=1.71Y0−56S+85F−2430 (N=8,r=0.920), whereY0 is the sample of biomass of the rice at flowering in kg/ha,S andF are the duration of sunshine hours and maximum air temperatures (°C) between the 46th day of transplanting and maturity.

Key words

Paddy rice yield Evapotranspiration Correlation model-Kerala 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. ARS (1984) Annual report of 1976–1977. Agronomic Research Station, ChalakudyGoogle Scholar
  2. De Datta SK (1981) Principles and practices of rice production. Wiley, New York, pp 9–40Google Scholar
  3. De Datta SK, Zaratte PM (1970) Environmental conditions affecting growth characteristics, nitrogen response and grain yield of tropical rice. Biometeorology 4:71–89Google Scholar
  4. Doorenbos J, Pruitt WO (1977) Guidelines for predicting crop water requirements. Irrigation and drainage. paper no 24. FAO, Rome, pp 144Google Scholar
  5. Rao AS, Vamadevan VK (1985) Insolation in monsoonal wet tropics and transmission/reflection coefficients of leaves of some plantation crops. Mausam 36(3):347–350Google Scholar
  6. Satake T, Yoshida S (1977a) Mechanism of sterility caused by high temperature at flowering time inindica rice. JARQ 11:127–128Google Scholar
  7. Satake T, Yoshida S (1977b) Critical temperature and duration for high temperature-induced sterility inindica rice. JARQ 11:190–191Google Scholar
  8. Stansel JW, Bollich CN, Thysell JR, Hall VL (1965) The influence of light intensity and nitrogen fertility on rice yield components. Rice J 68 (4):34–35, 49Google Scholar
  9. Subba rao K, Venkataraman S, Sarker RP (1976) Evapotranspiration of paddy crop in relation to pan evaporation at Nellore and Canning. Sci Rep no. 76/12, India Meteorol Dept, PoonaGoogle Scholar
  10. Tomar VS, O'Toole JC (1980) Water use in lowland rice cultivation in Asia: A review of evapotranspiration. Agric Water Manage 3:83–106Google Scholar
  11. Vergara BS, Chang TT (1976) The flowering response of the rice plant to photoperiod: a review of literature. IRRI Tech Bull 8:75Google Scholar
  12. Yoshida S, Parao FR (1976) Climatic influence on rice yield and yield components of lowland rice in the tropics. In: Climate and rice IRRI, Los Baños, Philippines, pp 471–494Google Scholar

Copyright information

© International Society of Biometeorology 1988

Authors and Affiliations

  • A. S. Rao
    • 1
  • D. Alexander
    • 2
  1. 1.Centre for Water Resources Development and ManagementCalicutIndia
  2. 2.Regional Agricultural Research StationPattambiIndia
  3. 3.Division IVCentral Arid Zone Research InstituteJodhpurIndia

Personalised recommendations