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INVESTIGATIONS ON TIME OF PLANTING AND METHOD OF CURING IN ORIENTAL TOBACCO (Nicotiana tabacum)

KrishiKosh

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Title INVESTIGATIONS ON TIME OF PLANTING AND METHOD OF CURING IN ORIENTAL TOBACCO (Nicotiana tabacum)
 
Creator RANGA NETHAJI, P
 
Contributor REDDI RAMU, Y
 
Subject organic fertilizers, sowing, rhizobium, yields, farmyard manure, planting, application methods, vermicomposting, biofertilizers, livestock, INVESTIGATIONS, PLANTING, METHOD, CURING, ORIENTAL TOBACCO, Nicotiana tabacum
 
Description An experiment entitled ?Investigations on time of planting and method of curing in oriental tobacco? was conducted during rabi, 2013 in the farmers field of Thotavaripalle village of P.T.M. Mandal, Chittoor District, Andhra Pradesh, to identify the optimum planting time and best curing method for oriental tobacco.
The experiment was laid out in a randomized block design with factorial concept and replicated thrice. The experiment consisted of 12 treatments with combination of four times of planting viz., T1 (first fortnight of October), T2 (second fortnight of October), T3 (first fortnight of November) and T4 (second fortnight of November) and three curing methods viz., C1 (open rack sun curing), C2 (25 per cent ventilated polyhouse curing) and C3 (50 per cent polyhouse curing). The test variety used in the study was ?Izmir?.
The results indicated that among the different times of planting evaluated, the growth parameters viz., plant height, number of green leaves plant-1and total dry matter production were higher in the crop planted during October second fortnight, at all the stages of observations compared to either early or later plantings. The lowest values of these growth parameters were registered in the crop planted during second fortnight of November.
Among the different times of planting, the highest green leaf yield was recorded in the crop planted during second fortnight of October which was higher than the other dates of planting, while the lowest green leaf yield was registered in the crop planted during November second fortnight.
The highest cured leaf yield was obtained in the crop planted during second fortnight of October which was significantly superior to either October first fortnight or November plantings. The lowest cured leaf yield was recorded in the November second fortnight planted crop. The highest cured leaf yield was noticed in the 25 percent ventilated polyhouse curing method, while the lowest was registered in the open rack sun curing method. The interaction between times of planting and methods of curing was not traceable.
The temperature and humidity conditions prevailed during curing process in the 25 per cent ventilated polyhouse resulted in superior quality leaf in terms of physical and chemical characteristics while, the inferior quality leaf was noticed in the open rack sun curing method.
The lowest nicotine content was recorded in the crop planted during October first fortnight which was comparable with crop planted during October second fortnight. The highest nicotine content was registered in the crop planted during November second fortnight. The lowest values of nicotine was noticed in the 25 per cent ventilated polyhouse curing, while the highest nicotine content was recorded in the open rack sun curing.
The highest amount of total sugars were recorded in the crop planted during first fortnight of October which was comparable with the crop planted during October second fortnight, while the lowest per cent of total sugars was noticed in the crop planted during second fortnight of November. Curing of primed leaves under 25 per cent ventilated polyhouse method recorded the highest amount of total sugars, while the lowest content was registered in the open rack sun curing. Among the treatmental combinations the highest total sugars were recorded in the crop planted during October first fortnight and cured by 25 per cent ventilated polyhouse curing method which were comparable with crop planted in the second fortnight of October with the same method of curing. The crop planted during November second fortnight and cured by open rack sun curing recorded the lowest values.
The crop planted during second fortnight of October recorded highest potassium content (%), while the lowest values were observed in the November second fortnight planted crop. Curing of leaves by 25 per cent ventilated polyhouse method registered the highest potassium content whereas, the open rack sun curing recorded the lowest values. The interaction effect was found to be significant and the highest potassium content was recorded in the crop planted during October second fortnight and cured under 25 per cent ventilated polyhouse curing method, which in turn comparable with crop planted in the first fortnight of October with 25 per cent ventilated polyhouse curing. The crop planted during November second fortnight and cured in open rack sun curing recorded the lowest values of potassium content.
The time of planting has not exerted any significant influence on the colour of leaf in oriental tobacco. The better leaf colour was noticed in 25 per cent ventilated polyhouse curing method, while it was poor in the open rack sun curing method. The interaction was not traceable with respect to leaf colour.
The highest uptake of N, P and K was registered with the crop planted during second fortnight of October while, the lowest nutrient uptake was recorded in the crop planted during November second fortnight.
The maximum and minimum values of post harvest soil available nitrogen, phosphorus and potassium were recorded in the plots where tobacco was planted during November second fortnight and October second fortnight respectively.
The highest gross returns, net returns and benefit cost ratio were realized with the crop planted during second fortnight of October which were significantly superior over the other treatments, while they were found to be at the lowest with the crop planted during November second fortnight. Among the curing methods, the higher values of gross returns, net returns and benefit cost ratio were obtained with 25 per cent ventilated polyhouse curing method. The lowest values were obtained with open rack sun curing method. The highest economic returns were obtained in the crop planted during second fortnight of October and cured under 25 per cent ventilated polyhouse curing, while the lowest values of gross returns and net returns as well as benefit cost ratio were realized with the crop planted in November second fortnight and cured by open rack method.
The present investigation was revealed that in sandy clay loam soils of western parts of Chittoor district in Andhra Pradesh the highest cured leaf yield with better leaf quality and higher economic returns were obtained with the planting of oriental tobacco during second fortnight of October and cured under 25 per cent ventilated polyhouse.
 
Date 2016-11-10T15:00:58Z
2016-11-10T15:00:58Z
2014
 
Type Thesis
 
Identifier 131p.
http://krishikosh.egranth.ac.in/handle/1/84909
 
Language en_US
 
Relation D5014;
 
Format application/pdf
 
Publisher ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY