Abstract
The present investigation was conducted with the objective of utilizing locally available organic resources for substituting chemical fertilizer nitrogen partly and augmenting soil health. The experiment was carried out for the crop kharif rice (Oryza sativa L.) in coastal Karnataka with eleven treatments laid out in randomized block design with three replications. Vermicompost (VC), Poultry manure (PM) and Fish manure (FM) were used as organic nitrogen sources integrated with mineral nitrogen source of fertilizer urea at substitution ratios of 25, 50 and 100 percent. These treatments were compared with control and recommended dose of nitrogen. The results revealed that the substitution of 50 per cent of nitrogen through VC recorded significantly (P<0.05) higher plant height (92.27 cm), higher number of productive tillers (16.85 hill-1), higher grain yield (5434 kg ha-1) and straw yield ( 6817 kg ha-1) compared to control. The results of the soil sample analysis for soil fertility parameters indicated that the major nutrients were significantly (P<0.05) influenced by integrated nitrogen management. The available nitrogen (382.36 kg ha-1) and available potassium (143.7 kg ha-1) were significantly (P<0.05) higher in the treatment T4 where a recommended dose of nitrogen was substituted by 50 percent VC compared to control (294.05 kg ha-1 and 92.31 kg ha-1 respectively). However, the available soil phosphorus was significantly higher with treatment 50 per cent RDN substituted by PM (78.83 kg ha-1) as compared to control (43.93 kg ha-1). Thus, integrated resource management improved crop yield and post-harvest soil fertility.
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Claims 7
Claim · model-written summary
Replacing half of nitrogen with vermicompost raised rice plant height to 92.27 cm versus control.
- Taxon
- rice
Oryza sativae0t0 - Treatment
- substitution of 50 per cent of nitrogen through VCe0
- Outcome
- plant heighte0
- Direction
- highere0
- Value
- 92.27 cme0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“substitution of 50 per cent of nitrogen through VC recorded significantly (P<0.05) higher plant height (92.27 cm)”
t0“rice (Oryza sativa L.)”
Claim · model-written summary
Replacing half of nitrogen with vermicompost raised productive tillers to 16.85 per hill versus control.
- Taxon
- riceOryza sativae0t0
- Treatment
- substitution of 50 per cent of nitrogen through VCe0
- Outcome
- number of productive tillerse0
- Direction
- highere0
- Value
- 16.85 hill-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“substitution of 50 per cent of nitrogen through VC recorded significantly (P<0.05) higher plant height (92.27 cm), higher number of productive tillers (16.85 hill-1)”
t0“rice (Oryza sativa L.)”
Claim · model-written summary
Replacing half of nitrogen with vermicompost raised grain yield to 5434 kg per hectare versus control.
- Taxon
- riceOryza sativae0t0
- Outcome
- grain yielde0
- Direction
- highere0
- Value
- 5434 kg ha-1e0
- Comparator
- controle0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher grain yield (5434 kg ha-1) and straw yield ( 6817 kg ha-1) compared to control”
t0“rice (Oryza sativa L.)”
Claim · model-written summary
Replacing half of nitrogen with vermicompost raised straw yield to 6817 kg per hectare versus control.
- Taxon
- riceOryza sativae0t0
- Outcome
- straw yielde0
- Direction
- highere0
- Value
- 6817 kg ha-1e0
- Comparator
- controle0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher grain yield (5434 kg ha-1) and straw yield ( 6817 kg ha-1) compared to control”
t0“rice (Oryza sativa L.)”
Claim · model-written summary
The 50 percent vermicompost substitution increased available soil nitrogen to 382.36 kg per hectare versus control.
- Taxon
- riceOryza sativae0t0
- Treatment
- substituted by 50 percent VCe0
- Outcome
- available nitrogene0
- Direction
- highere0
- Value
- 382.36 kg ha-1e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“available nitrogen (382.36 kg ha-1) and available potassium (143.7 kg ha-1) were significantly (P<0.05) higher in the treatment T4 where a recommended dose of nitrogen was substituted by 50 percent VC compared to control”
t0“rice (Oryza sativa L.)”
Claim · model-written summary
The 50 percent vermicompost substitution increased available soil potassium to 143.7 kg per hectare versus control.
- Taxon
- riceOryza sativae0t0
- Treatment
- substituted by 50 percent VCe0
- Outcome
- available potassiume0
- Direction
- highere0
- Value
- 143.7 kg ha-1e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“available potassium (143.7 kg ha-1) were significantly (P<0.05) higher in the treatment T4 where a recommended dose of nitrogen was substituted by 50 percent VC compared to control”
t0“rice (Oryza sativa L.)”
Claim · model-written summary
Replacing half the recommended nitrogen with poultry manure increased available soil phosphorus to 78.83 kg per hectare versus control.
- Taxon
- riceOryza sativae0t0
- Treatment
- 50 per cent RDN substituted by PMe0
- Outcome
- available soil phosphoruse0
- Direction
- highere0
- Value
- 78.83 kg ha-1e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“available soil phosphorus was significantly higher with treatment 50 per cent RDN substituted by PM (78.83 kg ha-1) as compared to control”
t0“rice (Oryza sativa L.)”
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