Relationship of agroclimatic parameters to high density grain production [India]
1987
Rao, S.P. (Directorate of Rice Research, Rajendranagar, Hyderabad 500030, A.P. (India))
Production of high density (HD) grains differs with crop duration, season, and N levels. It was found that HD grain index (% of fully filled grain of 1.18 specific gravity divided by spikelets per panicle) is influenced positively by crop duration and season and negatively by N level. Long-duration varieties IET5656, Mahsuri, CR1009, and Pankaj had higher HD grain indexes than the short- and medium-duration varieties. A similar trend was found when these varieties were tested under the different climatic conditions of the All India Coordinated Rice Physiology program. Short- and medium-duration varieties performed better in the dry season (65% HD grains) than in the wet season (45-55%). HD grains had a negative relationship with higher N levels in the field. However, higher N levels resulted in higher production of tillers, panicles, and spikelets, and higher leaf area index and total dry matter. Those overall increased yie1635lds were attributed to other yield compone
Mostrar más [+] Menos [-]Palabras clave de AGROVOC
Información bibliográfica
Este registro bibliográfico ha sido proporcionado por University of the Philippines at Los Baños