Abstract
An on farm field experiment was conducted to evaluate locally improved aman rice varieties in terms of nitrogen use efficiency and grain yield in southern region of Bangladesh. The treatments were: i. deep placement of urea (UDP) before panicle initiation stage and ii. farmers practice (FP/control). The locally popular rice varieties were used as planting materials. Higher panicles m-2 and grains panicle-1 was obtained from UDP application compared to FP. Nitrogen fertilization increases grain and straw nitrogen content significantly. Application of urea before panicle initiation stage gave considerable higher grain yield in all cultivated varieties. Cultivated aman varieties produced 2.0 to 2.5 t ha-1 grain without application of N fertilizer. But, cultivated local variety Razashail, Kutiagoni, Sadachikon, Sadapajam, Lalmota and Sadamota gave 3.0 to 3.5 t ha-1 grain in tidal prone areas with UDP. Hence, application of urea gave yield advantage by 0.5 to 1.0 t ha-1. The highest internal, agronomic, recovery and physiological efficiency; nitrogen harvest and grain yield efficiency index was obtained from Kutiagoni, Lalpayka, Sadachikon, Sadapajam, Moulata and Lalmota. Based on the yield and nitrogen fertilizer use efficiency, it could be concluded that UDP before panicle initiation stage is an effective option of urea application for rice cultivation in tidal prone areas.Bangladesh Agron. J. 2016 19(2): 39-49
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Claims 8
Claim · model-written summary
Deep urea placement increased panicles per area and grains per panicle versus farmer practice.
- Taxon
- Rice
Oryza sativat0 - Treatment
- UDP applicatione0
- Outcome
- panicles m-2 and grains panicle-1e0
- Direction
- Highere0
- Comparator
- FPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher panicles m-2 and grains panicle-1 was obtained from UDP application compared to FP”
t0“Locally Improved Rice Varieties”
Claim · model-written summary
Nitrogen fertilization significantly increased grain and straw nitrogen content.
- Taxon
- RiceOryza sativat0
- Treatment
- Nitrogen fertilizatione0
- Outcome
- grain and straw nitrogen contente0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen fertilization increases grain and straw nitrogen content significantly”
t0“Locally Improved Rice Varieties”
Claim · model-written summary
Urea before panicle initiation increased grain yield in all cultivated varieties.
- Taxon
- RiceOryza sativat0
- Treatment
- Application of urea before panicle initiation stagee0
- Outcome
- grain yielde0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of urea before panicle initiation stage gave considerable higher grain yield in all cultivated varieties”
t0“Locally Improved Rice Varieties”
Claim · model-written summary
Aman varieties yielded 2.0 to 2.5 t ha-1 grain without nitrogen fertilizer.
- Taxon
- RiceOryza sativat0
- Material
- aman varietiese0
- Outcome
- graine0
- Value
- 2.0 to 2.5 t ha-1e0
- Qualifier
- without application of N fertilizere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cultivated aman varieties produced 2.0 to 2.5 t ha-1 grain without application of N fertilizer”
t0“Locally Improved Rice Varieties”
Claim · model-written summary
Six named local varieties yielded 3.0 to 3.5 t ha-1 grain with UDP in tidal areas.
- Taxon
- RiceOryza sativat0
- Material
- Razashail, Kutiagoni, Sadachikon, Sadapajam, Lalmota and Sadamotae0
- Outcome
- graine0
- Value
- 3.0 to 3.5 t ha-1e0
- Qualifier
- with UDPe0
- Setting
- tidal prone arease0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cultivated local variety Razashail, Kutiagoni, Sadachikon, Sadapajam, Lalmota and Sadamota gave 3.0 to 3.5 t ha-1 grain in tidal prone areas with UDP”
t0“Locally Improved Rice Varieties”
Claim · model-written summary
Urea gave a 0.5 to 1.0 t ha-1 yield advantage.
- Taxon
- RiceOryza sativat0
- Treatment
- ureae0
- Outcome
- yield advantagee0
- Direction
- advantagee0
- Value
- 0.5 to 1.0 t ha-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of urea gave yield advantage by 0.5 to 1.0 t ha-1”
t0“Locally Improved Rice Varieties”
Claim · model-written summary
Kutiagoni, Lalpayka, Sadachikon, Sadapajam, Moulata and Lalmota had the highest nitrogen efficiency indices and grain yield efficiency index.
- Taxon
- RiceOryza sativat0
- Material
- Kutiagoni, Lalpayka, Sadachikon, Sadapajam, Moulata and Lalmotae0
- Outcome
- internal, agronomic, recovery and physiological efficiency; nitrogen harvest and grain yield efficiency indexe0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest internal, agronomic, recovery and physiological efficiency; nitrogen harvest and grain yield efficiency index was obtained from Kutiagoni, Lalpayka, Sadachikon, Sadapajam, Moulata and Lalmota”
t0“Locally Improved Rice Varieties”
Claim · model-written summary
The authors recommend UDP before panicle initiation for tidal-area rice cultivation.
- Taxon
- riceOryza sativae0
- Outcome
- UDP before panicle initiation stage is an effective option of urea applicatione0
- Setting
- tidal prone arease0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“UDP before panicle initiation stage is an effective option of urea application for rice cultivation in tidal prone areas”
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See all 2,045 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.