Summary
The influence of the meteorological parameters: maximum and minimum temperatures, relative humidity, rainfall and duration of sunshine, on sugarcane yield, is studied by fitting third-degree response function models using the long-period experimental data at the Regional Agricultural Research Station at Anakapalle (17°38′N, 83°01′E), Andhra Pradesh, India. These models give the quantitative response in the yield brought about by a unit change in the meteorological parameters at each stage of the crop growth. The maximum and minimum temperatures and relative humidity during the first three months of the crop (germination and tillering phases), are found to have a profound influence on the yield. Above normal temperatures and drier conditions at this time seem to be favourable for good yields. Presuming that the year-to-year variations of the meteorological parameters are largely the reflections of the broad synoptic systems prevailing over and around the area of study, an attempt has been made to identify the macrometeorological situations that critically affect the sugarcane yield. This is accomplished through selected case studies of weather situations during the critical periods obtained above, for some poor-yield and good-yield years. This study helps in fixing the favourable and unfavourable macrometeorological systems, which could be useful for issuing special agrometeorological forecasts for sugarcane growers and crop-outlook statements.
Zusammenfassung
Der Einfluß der meteorologischen Parameter Maximum- und Minimum-Temperatur, relative Feuchte, Niederschlag und Sonnenscheindauer auf den Zuckerrohrertrag wird durch Angleichen von respondierenden Funktionsmodellen dritten Grades studiert, welche langfristige Daten der regionalen landwirtschaftlichen Forschungsstation in Anakapalle (17°38′N, 83°01′E), Andhra Pradesh, Indien, benützen. Diese Modelle liefern ein quantitatives Ansprechen des Ertrages, der durch Änderung in den meteorologischen Parametern um je eine Einheit in jedem Stadium der Wachstumsentwicklung hervorge rufen wird. Der stärkste Einfluß auf den Ertrag wird durch Maximum- und Minimum-Temperaturen und durch die Feuchte während der ersten drei Monate des Wachstums (Keimungs- und Sprossungsphasen) hervorgerufen. Übemormale Temperaturen und verhältnismäßig trockene Bedingungen während dieser Zeit scheinen sich vorteilhaft auf den Ertrag auszuwirken. Unter der Annahme, daß die interannuale Veränderlichkeit der meteorologischen Parameter hauptsächlich durch die großräumigen synoptischen Systeme im Raume der Beobachtungsstation bestimmt wird, wurde versucht, die makrometeorologischen Lagen, welche den Zuckerrohrertrag beeinflussen, zu identifizieren. Dies wurde durch Studien selektiver Fälle von Wetterlagen während der kritischen Zeitperioden in etlichen Jahren mit schlechtem und mit gutem Ertrag bewerkstelligt. Die Identifizierung von günstigen und ungünstigen Wetterlagen kann in der Herausgabe von speziellen, agrarmeteorologischen Vorhersagen für Zuckerrohrplantagen und für Ertragsabschätzungen von Nutzen sein.
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Rupa Kumar, K. Yield response of sugarcane to weather variations in Northeast Andhra Pradesh, India. Arch. Met. Geoph. Biocl., Ser. B 35, 265–276 (1984). https://doi.org/10.1007/BF02263351
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DOI: https://doi.org/10.1007/BF02263351