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- W1550160240 abstract "The effect of water stress on canopy development of sugarcane cultivars N22 and NCo376 was evaluated in a rain shelter facility at the South African Sugarcane Research Institute at Mount Edgecombe. The crop was grown under unstressed conditions for four months. Subsequently, water was withheld from one half of the trial for a period of 42 days. Soil water content in the stressed plots decreased from field capacity of 26% at the start of drying to 15% on day 15, and to a permanent wilting point of 10% at approximately day 40. Shoot survival in N22 was more sensitive to water stress than in NCo376. Water stress caused a simultaneous reduction in leaf appearance rate and an increase in leaf senescence rate, and consequently markedly reduced green leaf number in both cultivars. Leaf senescence appears very sensitive to water stress, with increases apparent at high relative soil water content (RSWC). Interception of radiation was not as sensitive to water stress as leaf area, and in both cultivars decreased only after RSWC dropped below 0.5. NCo376 was able to maintain canopy development processes longer under conditions of increasing water stress, and thus maintained a higher green leaf area index for longer than N22. This was achieved by extracting more water from the profile than N22, thereby maintaining a high turgor for longer, and supporting growth processes for longer. The information obtained in this study will be used to refine and test crop canopy algorithms in crop models. This will allow better application of models to assist management of sugarcane production, especially under conditions of limited water supply." @default.
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- W1550160240 date "2005-01-01" @default.
- W1550160240 modified "2023-09-23" @default.
- W1550160240 title "Differences in canopy development of two sugarcane cultivars under conditions of water stress: preliminary results." @default.
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