Abstract
An experiment was conducted during 2004—08 at the Regional Station of Central Plantation Crops Research Institute, Kayamkulam, Kerala on root (wilt) disease affected palms of West Coast Tall variety. The entire field was divided into 2 parts and applied with full dose of fertilizers (500:300:1000 g NPK/palm/year) and with 50 % fertilizers + organic manures as vermicompost and incorporation of local variety of green manure cowpea (Vigna unguiculata L. Walp.) raised in the palm basin. All the coconut palms were indexed for the disease during December-May (2005 to 2008). There was not much variation in the nutrient content in leaves of palms under various treatments except P and K which are slightly high in palms supplied with both fertilizers and organic manures. Presence of higher population of function-specific micro-organisms was found in the rhizosphere soils of disease early palms than in the other categories. Comparison of treatment after accounting for variations in disease index separately for various years was found non-significant. Though the post-treatment yield in both the treatments was non-significant, there was an increase of 17 % in yield in palms receiving both fertilizers and organic manures compared to 7 % increase in palms receiving only fertilizers. Negative correlation existed between yield and disease index in 2005, 2006 and 2007 and was respectively -0.223, -0.268 and -0.284 (P<0.05). In general, copra content was higher in palms applied with both fertilizers and organic manures and the overall increase was 4.57 % over the other treatment. The results indicated that through an integrated nutritional management, soil health as well as health of palms could be improved over the years or maintained without further deterioration.
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Claims 8
Claim · model-written summary
Leaf P and K were slightly higher under fertilizer plus organic manure.
- Taxon
- coconutt0
- Treatment
- both fertilizers and organic manurese0
- Outcome
- P and Ke0
- Direction
- slightly highe0
Not reportedComparator
Verbatim
e0“P and K which are slightly high in palms supplied with both fertilizers and organic manures”
t0“coconut”
Claim · model-written summary
Function-specific microorganisms were more numerous in rhizosphere soils of early disease palms.
Verbatim
e0“higher population of function-specific micro-organisms was found in the rhizosphere soils of disease early palms than in the other categories”
t0“coconut”
Claim · model-written summary
Treatment comparisons adjusted for disease index were nonsignificant.
Verbatim
e0“Comparison of treatment after accounting for variations in disease index separately for various years was found non-significant”
t0“coconut”
Claim · model-written summary
Yield under both fertilizer and organic manure increased 17%.
Verbatim
e0“there was an increase of 17 % in yield in palms receiving both fertilizers and organic manures compared to 7 % increase in palms receiving only fertilizers”
t0“coconut”
Claim · model-written summary
Yield under only fertilizer increased 7%.
Verbatim
e0“7 % increase in palms receiving only fertilizers”
t0“coconut”
Claim · model-written summary
Yield and disease index were negatively correlated in 2005, 2006 and 2007.
- Taxon
- coconutt0
- Outcome
- yield and disease indexe0
- Direction
- Negativee0
- Value
- -0.223, -0.268 and -0.284e0
- Qualifier
- 2005, 2006 and 2007e0
Not reportedSetting
Verbatim
e0“Negative correlation existed between yield and disease index in 2005, 2006 and 2007 and was respectively -0.223, -0.268 and -0.284 (P<0.05)”
t0“coconut”
Claim · model-written summary
Copra content was higher under fertilizer and organic manure, by 4.57% over the other treatment.
Verbatim
e0“copra content was higher in palms applied with both fertilizers and organic manures and the overall increase was 4.57 % over the other treatment”
t0“coconut”
Claim · model-written summary
Integrated nutritional management may improve or maintain palm and soil health.
Verbatim
e0“through an integrated nutritional management, soil health as well as health of palms could be improved over the years or maintained without further deterioration”
t0“coconut”
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