AI Article Synopsis

  • Sorghum is a crucial crop for food security in dry regions due to its resilience to challenges like poor soil and pests, making it suitable for low-fertility lands.
  • A two-year study in China explored how different factors—like variety, location, sowing dates, and plant density—affect sorghum yields, revealing that location had the largest impact, followed by variety, while factors like sowing date and density contributed less.
  • The research concluded that mid-maturing sorghum varieties are preferable in spring sowing early maturing areas, as they perform better under varying climate conditions during critical growth stages.

Article Abstract

Sorghum [ (L.) Moench] is an important crop for food security in semiarid and arid regions due to its high tolerance to abiotic and biotic stresses and its good performance in marginal lands with relatively low fertility. To deeply understand the interrelationship among sorghum genotype, environment, sowing dates, and densities in the spring sowing early maturing (SSEM) areas of China, and to provide a basis for specifying scientific and reasonable cultural practices, a two-year field experiment was conducted with six popular varieties at six locations. Combined ANOVA showed that the yield difference between years was significant (); the yield differences among locations, varieties, sowing dates, and densities were all highly significant (). The variety effect was mainly influenced by location, year, sowing dates and their interactions. The sowing effect was mainly influenced by the location, year, variety and their interactions The plant density effect was significantly influenced by location and location-year interaction. Of the contributions of various test factors to yield variance, the location was the largest one (38.18%), followed by variety (12.31%), sowing date (1.53%), density (0.54%), and year (0.09%), with all these single factors accounting for 52.65%. The total contribution of all two-factor interactions accounted for 14.24%, among which the greatest contributor was location-hybrid interaction (8.07%). The total contribution of all three-factor interactions accounted for 14.58%, of which year-location-hybrid interaction was the largest contributor (9.02%). Sowing dates significantly affected model of sorghum growth and development, especially during the late period. The key climatic factors affecting yield were different among the six locations. Weather factors during the grain filling stages contributed much more than those during the early stage to grain yield. Mid-maturing varieties are recommended other than early maturing varieties for the SSEM areas even when late sowing occurs. Sowing as early as possible is recommended for areas with very short frost-free period (Harbin, Tongliao, and Datong). Proper delayed sowing is recommended for areas with a relative long frost-free period (Gongzhuling, Baicheng and Zhangjiakou). This research will provide a conducive reference for sorghum production in similar areas.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9533098PMC
http://dx.doi.org/10.3389/fpls.2022.1008198DOI Listing

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