Solar energy utilization by tropical sorghums. Part I. Seasonal patterns and productivity uri icon

abstract

  • Data on global solar radiation, phenology and seasonal drymatter production of sorghum, grown at ICRISAT Center during the rainy and postrainy seasons over a three-year period (1978?1980), were used to compute net potential productivity and compare it with actual productivity over three growth phases: GS1, GS2, and GS3. The largest difference in sorghum productivity (expressed as % of net potential productivity) occurred in the GS2 phase; and the difference in the rainy season was nearly twice that in the postrainy season. Measurements of intercepted photosynthetically active radiation and dry-matter production for sorghum, grown in different row spacings and on different soil types, showed that improved management can enhance interception of radiation by the crop, thereby leading to higher production. The productivity levels reported here could serve as a base for comparing sorghum productivity elsewhere in the tropics and in the temperate regions

publication date

  • 1985
  • 1985