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Trends in climate and productivity and relationship between climatic variables and productivity in black pepper (Piper nigrum)

Indian Agricultural Research Journals

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Title Trends in climate and productivity and relationship between climatic variables and productivity in black pepper (Piper nigrum)
 
Creator KRISHNAMURTHY, K S
KANDIANNAN, K
SIBIN, C
CHEMPAKAM, B
ANKEGOWDA, S J
 
Subject Black pepper; Climatic parameters; Rainfall; T max; T min; NYD; Yield
 
Description Trend analysis of the climatic parameters (past two decades) in major black pepper growing areas of the country showed in general that rainfall is decreasing while temperature is increasing. Black pepper productivity also showed a decreasing trend. Studies on the relationship between climatic parameters and productivity in black pepper showed that December and January rainfall had negative correlation while April and May rainfall had positive correlation. Minimum temperature had positive correlation in higher elevations while both T max and T min had negative correlation with productivity in plains. Results on the extent of relationship between climatic parameters and productivity revealed that T max and T min influenced yield more than rainfall or rainy days. Normalized yield deviations (NYD) were worked out (deviations from the mean for two decades) for different stations based on the climatic data for the past two decades. This was regressed with rainfall, T max and T min to get regression line which can predict the yield deviations if values for rainfall, T max and T min are substituted in the equation. However, apart from the weather parameters used for the study, other weather variables such as light and humidity and other factors such as cost of cultivation and price for the produce, diseases and management practices definitely have a role in production and productivity of black pepper.
 
Publisher The Indian Journal of Agricultural Sciences
 
Contributor —
 
Date 2011-08-03
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
 
Format application/pdf
 
Identifier http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/8436
 
Source The Indian Journal of Agricultural Sciences; Vol 81, No 8 (2011)
0019-5022
 
Language eng
 
Relation http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/8436/3395
 
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