Abstract
Nitrogen (N) and zinc (Zn) are the two major yield-limiting factors of flooded rice cultivation systems. Both nutrients interact and affect availability of the other in alkaline calcareous soils. In order to evaluate the interactive effects of N and Zn on yield and quality of Basmati rice, a field study was conducted at Sheikhupura (Site I) and Sargodha (Site II), Pakistan. Nitrogen treatments (0, 40, 80, 120 and 160 kg/ha) were kept in main blocks while zinc levels (0, 8, 10, 12 and 14 kg/ha) were kept in sub blocks. The main effects of N and Zn levels were significant for grain yield and yield attributes. N and Zn interaction significantly improved the grain yield, yield components and all kernel quality parameters, except kernel amylose contents. Combined application of 120 kg N/ha and 14 kg Zn/ha produced the maximum grain yields at both sites (6.12 and 5.78 t/ha). This combination also yielded the maximum kernel lengths and widths, water absorption ratio and kernel protein contents. There was a significant positive correlation between grain yield and total dry matter, panicle-bearing tillers, spikelets panicle, grain weight, and harvest index. Application of 160 kg N/ha was detrimental to yield and quality attributes and reduced the agronomic efficiency of N use at both sites. Site comparison showed that soil pH and soil nutrient contents play a significant role in determination of the optimum nitrogen and zinc fertilizer doses for maximum yields.
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Claims 10
Claim · model-written summary
N and Zn levels significantly affected grain yield and yield attributes.
Not reportedComparatorDirection
Verbatim
e0“The main effects of N and Zn levels were significant for grain yield and yield attributes.”
t0“Basmati Rice”
Claim · model-written summary
N and Zn interaction significantly improved grain yield and yield components.
- Taxon
- Basmati ricet0
- Treatment
- N and Zn interactione0
- Outcome
- grain yield, yield componentse0
- Direction
- improvede0
Not reportedComparator
Verbatim
e0“N and Zn interaction significantly improved the grain yield, yield components and all kernel quality parameters, except kernel amylose contents.”
t0“Basmati Rice”
Claim · model-written summary
N and Zn interaction improved kernel quality parameters except amylose content.
- Taxon
- Basmati ricet0
- Treatment
- N and Zn interactione0
- Outcome
- kernel quality parameters, except kernel amylose contentse0
- Direction
- improvede0
Not reportedComparator
Verbatim
e0“N and Zn interaction significantly improved the grain yield, yield components and all kernel quality parameters, except kernel amylose contents.”
t0“Basmati Rice”
Claim · model-written summary
120 kg N/ha with 14 kg Zn/ha produced 6.12 t/ha maximum grain yield at Sheikhupura.
- Taxon
- Basmati ricet0
- Treatment
- 120 kg N/ha and 14 kg Zn/hae0
- Outcome
- grain yieldse0
- Direction
- maximume0
- Value
- 6.12e0
- Setting
- Sheikhupura (Site I)e1
Not reportedComparator
Verbatim
e0“Combined application of 120 kg N/ha and 14 kg Zn/ha produced the maximum grain yields at both sites (6.12 and 5.78 t/ha).”
t0“Basmati Rice”
e1“In order to evaluate the interactive effects of N and Zn on yield and quality of Basmati rice, a field study was conducted at Sheikhupura (Site I) and Sargodha (Site II), Pakistan. Nitrogen treatments (0, 40, 80, 120 and 160 kg/ha) were kept in main blocks while zinc levels (0, 8, 10, 12 and 14 kg/ha) were kept in sub blocks.”
Claim · model-written summary
120 kg N/ha with 14 kg Zn/ha produced 5.78 t/ha maximum grain yield at Sargodha.
- Taxon
- Basmati ricet0
- Treatment
- 120 kg N/ha and 14 kg Zn/hae0
- Outcome
- grain yieldse0
- Direction
- maximume0
- Value
- 5.78 t/hae0
- Setting
- Sargodha (Site II), Pakistane1
Not reportedComparator
Verbatim
e0“Combined application of 120 kg N/ha and 14 kg Zn/ha produced the maximum grain yields at both sites (6.12 and 5.78 t/ha).”
t0“Basmati Rice”
e1“In order to evaluate the interactive effects of N and Zn on yield and quality of Basmati rice, a field study was conducted at Sheikhupura (Site I) and Sargodha (Site II), Pakistan. Nitrogen treatments (0, 40, 80, 120 and 160 kg/ha) were kept in main blocks while zinc levels (0, 8, 10, 12 and 14 kg/ha) were kept in sub blocks.”
Claim · model-written summary
The same N-Zn combination maximized kernel lengths and widths and water absorption ratio.
- Taxon
- Basmati ricet0
- Treatment
- 120 kg N/ha and 14 kg Zn/hae2
- Outcome
- kernel lengths and widths, water absorption ratioe0
- Direction
- maximume0
Not reportedComparator
Verbatim
e0“This combination also yielded the maximum kernel lengths and widths, water absorption ratio and kernel protein contents.”
t0“Basmati Rice”
e2“Combined application of 120 kg N/ha and 14 kg Zn/ha produced the maximum grain yields at both sites (6.12 and 5.78 t/ha).”
Claim · model-written summary
The same N-Zn combination maximized kernel protein content.
- Taxon
- Basmati ricet0
- Treatment
- 120 kg N/ha and 14 kg Zn/hae2
- Outcome
- kernel protein contentse0
- Direction
- maximume0
Not reportedComparator
Verbatim
e0“This combination also yielded the maximum kernel lengths and widths, water absorption ratio and kernel protein contents.”
t0“Basmati Rice”
e2“Combined application of 120 kg N/ha and 14 kg Zn/ha produced the maximum grain yields at both sites (6.12 and 5.78 t/ha).”
Claim · model-written summary
Grain yield correlated positively with dry matter, tillers, spikelets, grain weight, and harvest index.
Verbatim
e0“There was a significant positive correlation between grain yield and total dry matter, panicle-bearing tillers, spikelets panicle, grain weight, and harvest index.”
t0“Basmati Rice”
Claim · model-written summary
160 kg N/ha reduced yield and quality attributes.
- Taxon
- Basmati ricet0
- Treatment
- 160 kg N/hae0
- Outcome
- yield and quality attributese0
- Direction
- detrimentale0
Not reportedComparator
Verbatim
e0“Application of 160 kg N/ha was detrimental to yield and quality attributes and reduced the agronomic efficiency of N use at both sites.”
t0“Basmati Rice”
Claim · model-written summary
160 kg N/ha reduced agronomic efficiency of N use at both sites.
Not reportedComparator
Verbatim
e0“Application of 160 kg N/ha was detrimental to yield and quality attributes and reduced the agronomic efficiency of N use at both sites.”
t0“Basmati Rice”
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See all 464 papers →8 of 9 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
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.