Open AccessHeat utilization and radiation interception in transplanted rice (Oryza sativa L.) in relation to seedling age
Author(s) -
Navneet Aggarwal,
Avtar Singh,
Surender Singh
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.v18i1.908
Subject(s) - seedling , transplanting , panicle , oryza sativa , tiller (botany) , interception , agronomy , photosynthetically active radiation , crop , system of rice intensification , leaf area index , biology , horticulture , agriculture , botany , ecology , biochemistry , photosynthesis , gene
The experiment comprising of mechanical transplanting of 3, 4 and 5 weeks-old seedlings was conducted at Punjab Agricultural University, Ludhiana during 2010 and 2011 to study the effect of seedling age on heat utilization, radiation interception and productivity of rice. Mechanical transplanting of 3 weeksold seedlings recorded highest accumulation of growing degree days (GDD) of 2045oC day resulting from highest number of days taken to maturity. The heat use efficiency (HUE) was similar in all transplantedseedlings. The growth and yield attributes in terms of plant height, tiller number, panicle length, panicle weight, leaf area index (LAI) and photosynthetically active radiation (PAR) interception by the crop declined with increasing seedling age from 3 to 5 weeks. The 3 weeks-old transplanted seedlings recorded 0.90 and 2.79 per cent higher grain yield over 4 and 5 weeks old seedlings, respectively although the differences were non-significant.