Abstract
A long-term field investigation was carried out during 2001 to 2010 at Vittal (Karnataka) in a 22 year old coconut garden under laterite soil to study the impact of inorganic fertilizer substitutions by vermicompost (VC) on productivity and profitability of coconut (Cocos nucifera L.). The treatments, viz. recommended inorganic fertilizer (500 g N, 320 g P and 1200 g K/palm/year), 25% of N in the form of VC (9.6 kg/palm) + 75% of NPK, 50% N in the form of VC (19.2 kg/palm) + 50% of NPK, 75% in the form of VC (28.8 kg/palm) + 25% NPK and 100% N in the form of VC alone (38.5 kg/palm) were imposed in randomized block design. Annual leaf production did not differ significantly among the treatments; however, integrated treatments resulted in higher number of leaves (12 no.). Six years pooled data on nut yield indicated that, application of vermicompost in combination with inorganic fertilizer either at 25% of N + 75% NPK (64.5 nuts/palm/year) or 50% of N + 50% NPK (66.2 nuts/palm/year) resulted in significantly higher nut yield. There was improvement in the nutrient status of coconut leaves with integrated nutrient management practices compared to inorganic or organic manure alone application. The soil organic carbon build up was observed with application of 50% N or more in the form of vermicompost compared to the other treatments. Microbial population in respect of fungi and phosphate solubilizes were higher when vermicompost was applied.
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Claims 8
Claim · model-written summary
Annual coconut leaf production did not differ significantly among treatments.
Verbatim
e0“Annual leaf production did not differ significantly among the treatments”
t0“coconut (Cocos nucifera)”
Claim · model-written summary
Integrated treatments produced a higher number of leaves, 12.
- Taxon
- coconutt0
- Treatment
- integrated treatmentse0
- Outcome
- number of leavese0
- Direction
- highere0
- Value
- 12 no.e0
Not reportedComparator
Verbatim
e0“integrated treatments resulted in higher number of leaves (12 no.)”
t0“coconut (Cocos nucifera)”
Claim · model-written summary
The 25% vermicompost nitrogen plus 75% NPK treatment gave significantly higher nut yield of 64.5 nuts per palm per year.
- Taxon
- coconutt0
- Treatment
- 25% of N + 75% NPKe0
- Outcome
- nut yielde0
- Direction
- highere0
- Value
- 64.5 nuts/palm/yeare0
Not reportedComparator
Verbatim
e0“application of vermicompost in combination with inorganic fertilizer either at 25% of N + 75% NPK (64.5 nuts/palm/year) or 50% of N + 50% NPK (66.2 nuts/palm/year) resulted in significantly higher nut yield”
t0“coconut (Cocos nucifera)”
Claim · model-written summary
The 50% vermicompost nitrogen plus 50% NPK treatment gave significantly higher nut yield of 66.2 nuts per palm per year.
- Taxon
- coconutt0
- Treatment
- 50% of N + 50% NPKe0
- Outcome
- nut yielde0
- Direction
- highere0
- Value
- 66.2 nuts/palm/yeare0
Not reportedComparator
Verbatim
e0“application of vermicompost in combination with inorganic fertilizer either at 25% of N + 75% NPK (64.5 nuts/palm/year) or 50% of N + 50% NPK (66.2 nuts/palm/year) resulted in significantly higher nut yield”
t0“coconut (Cocos nucifera)”
Claim · model-written summary
Integrated nutrient management improved coconut leaf nutrient status relative to inorganic or organic manure alone.
Verbatim
e0“There was improvement in the nutrient status of coconut leaves with integrated nutrient management practices compared to inorganic or organic manure alone application”
Claim · model-written summary
At least 50% nitrogen as vermicompost built up soil organic carbon versus other treatments.
Verbatim
e0“The soil organic carbon build up was observed with application of 50% N or more in the form of vermicompost compared to the other treatments”
t0“coconut (Cocos nucifera)”
Claim · model-written summary
Fungal populations were higher under vermicompost.
Not reportedComparator
Verbatim
e0“Microbial population in respect of fungi and phosphate solubilizes were higher when vermicompost was applied”
t0“coconut (Cocos nucifera)”
Claim · model-written summary
Phosphate solubilizer populations were higher under vermicompost.
Not reportedComparator
Verbatim
e0“Microbial population in respect of fungi and phosphate solubilizes were higher when vermicompost was applied”
t0“coconut (Cocos nucifera)”
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