Open AccessRadiation utilization efficiency and surface energy exchange of winter maize (Zea mays L.) under different irrigation regimes
Author(s) -
Gouranga Kar,
ASHWANI KUMAR
Publication year - 2016
Publication title -
journal of agrometeorology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 11
eISSN - 2583-2980
pISSN - 0972-1665
DOI - 10.54386/jam.v18i2.934
Subject(s) - photosynthetically active radiation , agronomy , dry matter , biomass (ecology) , irrigation , environmental science , crop , yield (engineering) , crop yield , nutrient , biology , photosynthesis , botany , physics , ecology , thermodynamics
Knowledge of resource capture particularly, energy, nutrients and radiation by crop species under different management practices helps in improving productivity of any crop.Growth and yield of any grain crop are largely determined by intercepted photosynthetically active radiation (IPAR), the efficienc y of conversion of it into dry matter (RUE) and partitioning of dry matter to grain. In this investigation IPAR, RUE andenergy flux of the winter maize were studied and relationships were established among biomass, yield, RUE and IPAR under different irrigation (120, 180, 240, 300, 360 mm) and nitrogen (30, 60, 90, 120, 150 kg ha-1) levels. Simulation models that rely on RUE for biomass accumulation can use these relationships for predicting biomass and yield of the crop. The RUE of the crop ranged from 1.01 to 2.16 g MJ-1under different irrigation and nitrogen levels whereas, latent heat flux varied with the growth stages and values ranged between 8.64 to 18.77 MJ m-2 day-1.