Abstract
Continuous increase of nitrogen fertilizer use adversely affecting the soil health as well as the environment. It necessitates the systematic study of the impact of nitrogen (N) fertilizer use-reduction on crop yield. In this article, the effects of deep placement of nitrogen fertilizers on nitrogen use efficiency (NUE) and yield of rice variety “BRRI dhan46” were investigated and compared for three N formulations: urea super granule (USG), NPK briquettes and prilled urea (PU). The experiment was conducted in randomized complete block design (RCBD) with eight N treatments replicated three times. The treatments were applied by varying doses (0, 52, 78 and 104 kg ha-1) of nitrogen fertilizers in a known identical soil and weather condition. Applications of PU, USG and NPK briquettes exhibited significant differences on yield attributes of rice. Results revealed maximum grain yield of 6.391 t ha-1 (54% increases over control) for the dose USG 104 kg ha-1 which is statistically similar to the dose USG 78 kg ha-1 and NPK briquettes 104 kg ha-1. The deep placement of USG and NPK briquettes enhanced both the recovery of applied N and N use efficiency compared to broadcast application of prilled urea. However, USG 78 kg ha-1 showed maximum apparent N recovery, N use efficiency, gross margin and marginal benefit-cost ratio. Thus, an application of 78 kg ha-1 USG can be recommended for profitable cultivation of rice variety BRRI dhan46. SAARC J. Agri., 17(1): 93-103 (2019)
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Claims 10
Claim · model-written summary
Fertilizer formulations differed significantly in rice yield attributes.
- Taxon
- rice
Oryza sativae0 - Treatment
- PU, USG and NPK briquettese0
- Outcome
- yield attributese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applications of PU, USG and NPK briquettes exhibited significant differences on yield attributes of rice.”
Claim · model-written summary
USG at 104 kg ha-1 gave maximum grain yield of 6.391 t ha-1, 54% above control.
- Treatment
- USG 104 kg ha-1e0
- Outcome
- grain yielde0
- Direction
- maximume0
- Value
- 6.391 t ha-1e0
- Qualifier
- 54% increases over controle0
- Comparator
- controle0
Not reportedTaxon
Verbatim
e0“maximum grain yield of 6.391 t ha-1 (54% increases over control) for the dose USG 104 kg ha-1”
Claim · model-written summary
The 104 kg ha-1 USG yield was statistically similar to USG at 78 kg ha-1.
- Treatment
- USG 104 kg ha-1e0
- Outcome
- statistically similare0
- Direction
- statistically similare0
- Comparator
- USG 78 kg ha-1e0
Not reportedTaxon
Verbatim
e0“the dose USG 104 kg ha-1 which is statistically similar to the dose USG 78 kg ha-1”
Claim · model-written summary
The 104 kg ha-1 USG yield was statistically similar to NPK briquettes at 104 kg ha-1.
- Treatment
- USG 104 kg ha-1e0
- Outcome
- statistically similare0
- Direction
- statistically similare0
- Comparator
- NPK briquettes 104 kg ha-1e0
Not reportedTaxon
Verbatim
e0“the dose USG 104 kg ha-1 which is statistically similar to the dose USG 78 kg ha-1 and NPK briquettes 104 kg ha-1”
Claim · model-written summary
Deep placement of USG improved applied N recovery versus broadcast prilled urea.
- Taxon
- riceOryza sativat0
- Treatment
- deep placement of USGe0
- Outcome
- recovery of applied Ne0
- Direction
- enhancede0
- Comparator
- broadcast application of prilled ureae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The deep placement of USG and NPK briquettes enhanced both the recovery of applied N and N use efficiency compared to broadcast application of prilled urea.”
t0“rice”
Claim · model-written summary
Deep placement of USG improved N use efficiency versus broadcast prilled urea.
- Taxon
- riceOryza sativat0
- Treatment
- deep placement of USGe0
- Outcome
- N use efficiencye0
- Direction
- enhancede0
- Comparator
- broadcast application of prilled ureae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The deep placement of USG and NPK briquettes enhanced both the recovery of applied N and N use efficiency compared to broadcast application of prilled urea.”
t0“rice”
Claim · model-written summary
Deep placement of NPK briquettes improved applied N recovery versus broadcast prilled urea.
- Taxon
- riceOryza sativat0
- Treatment
- deep placement of USG and NPK briquettese0
- Outcome
- recovery of applied Ne0
- Direction
- enhancede0
- Comparator
- broadcast application of prilled ureae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The deep placement of USG and NPK briquettes enhanced both the recovery of applied N and N use efficiency compared to broadcast application of prilled urea.”
t0“rice”
Claim · model-written summary
Deep placement of NPK briquettes improved N use efficiency versus broadcast prilled urea.
- Taxon
- riceOryza sativat0
- Treatment
- deep placement of USG and NPK briquettese0
- Outcome
- N use efficiencye0
- Direction
- enhancede0
- Comparator
- broadcast application of prilled ureae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The deep placement of USG and NPK briquettes enhanced both the recovery of applied N and N use efficiency compared to broadcast application of prilled urea.”
t0“rice”
Claim · model-written summary
USG at 78 kg ha-1 maximized apparent N recovery, N use efficiency, gross margin and marginal benefit-cost ratio.
- Taxon
- riceOryza sativat0
- Treatment
- USG 78 kg ha-1e0
- Outcome
- maximum apparent N recovery, N use efficiency, gross margin and marginal benefit-cost ratioe0
- Direction
- maximume0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“USG 78 kg ha-1 showed maximum apparent N recovery, N use efficiency, gross margin and marginal benefit-cost ratio.”
t0“rice”
Claim · model-written summary
The authors recommend 78 kg ha-1 USG for profitable cultivation of BRRI dhan46.
- Taxon
- riceOryza sativae0
- Material
- BRRI dhan46e0
- Outcome
- application of 78 kg ha-1 USGe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an application of 78 kg ha-1 USG can be recommended for profitable cultivation of rice variety BRRI dhan46”
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