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Effect of water deficit on relationship between yield and physiological attributes of banana cultivars and hybrids

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Title Effect of water deficit on relationship between yield and physiological attributes of banana cultivars and hybrids
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Creator Krishna Surendar K, D. Durga Devi , I. Ravi , P. Jeyakumar and K. Velayudham.
 
Subject Water deficit, relative water content (RWC), chlorophyll stability index (CSI), membrane stability index (MSI), yield, banana.
 
Description Water stress is a major problem in banana growth and
development. It is the leading tropical fruit in the world
market with a highly organized and developed industry.
Drought is an insidious hazard of nature. Although it has
scores of definitions, it originates from a deficiency of
precipitation over an extended period of time, usually a
season or more.
This study examined the relationship between the yield reduction by chlorophyll stability index (CSI),
membrane stability index (MSI) and relative water content (RWC). The field experiment was conducted
at National Research Centre for banana to screen the banana cultivars and hybrids for water deficit
tolerance and to elucidate information on growth attributes mechanism of banana cultivars and hybrids.
Water stress was imposed at different critical growth stages viz., 3rd, 5th, 7th and 9th month after planting.
The stress was given by scheduling irrigation at the 50% available soil moisture (ASM) during critical
stages. The soil moisture content was analyzed by using pressure plate membrane apparatus. In
control plots, the irrigation was given at the ASM of 80% with the soil water potential of about -6 bars. In
stressed plots, the irrigation was given at 50% ASM with the soil water potential of -14 bars. In stressed
plots, 50% ASM was reached around 30 days. The present study was conducted with twelve cultivars
and hybrids with three replications. The data were analyzed by using split plot design. The results
revealed that the cultivars of Karpuravalli, Karpuravalli x Pisang Jajee, Saba and Sannachenkathali
recorded significantly higher yield (67.3, 52.4, 55.8 and 41.3 t ha-1
) and the magnitude of yield was
decreased by 12% than the cultivars and hybrids of Matti, Pisang Jajee x Matti, Matti x Anaikomban and
Anaikomban x Pisang Jajee (14.9, 11.1, 10.3 and 10.6 t/ha). Similarly, Karpuravalli, Karpuravalli x Pisang
Jajee, Saba and Sannachenkathali recorded significantly high relative water content, chlorophyll
stability index and membrane stability index with lesser reduction percent were shown than the
cultivars and hybrids of Matti, Pisang Jajee x Matti, Matti x Anaikomban and Anaikomban x Pisang
Jajee.
 
Date 2017-01-12T10:02:17Z
2017-01-12T10:02:17Z
2013-07-05
 
Type Research Paper
 
Identifier 1996-0824
http://krishi.icar.gov.in/jspui/handle/123456789/1369
 
Language English
 
Publisher Academic Journals