1 research outputs found
Not Available
Not AvailableFlue cued Virginia (FCV) tobacco is an important
commercial crop grown under rainfed conditions
(>70% area) in Southern Transitional Zone (STZ) of
Karnataka and is typically characterized by drysub
humid to semi-arid climate. Being a rainfed
production system, the sustainable leaf
productivity and cured leaf quality / chemistry is
largely influenced by climate changes and prevailing
weather situations during the crop growth period.
Even though Meteorological Standard Week 26th was
found to be a dry spell week indicating that the
short term drought can occur during the active
growth stage of the crop, the fluctuations or the
coefficient of variations in rainfall (RF) intensity
and rainy days of July month are very high enough
(46.3 and 39.8%, respectively) to cause serious
losses in productivity and leaf quality. Regression
models based on RF data of 34 years (1981-2014)
indicated that productivity followed sigmoid/ bell
shaped curve with the July RF. Nicotine content in
cured leaf found to be negatively correlated with
increase in quantum of July RF, but on the other
hand reducing sugars found to increase with
increase in July RF. Leaf chlorides showed declining
trend with increased rainfall. The study suggested
that the reliable forecast of July month rainfall
situation becomes very much relevant in
determining not only yield estimates/ quality
assessment, but also serves for planning possible
climate mitigation/crop management strategies for
maintaining better productivity and quality leaf
required for sustaining the export potential and
farm income in this rainfed agro-climatic zone.Not Availabl