Abstract
A field experiment was conducted at the National Maize Research Program (NMRP) Farm, Rampur, Chitwan during winter season, 2008/09 to study the effects of three plant densities (55,555, 66,666 and 83,333 plants/ha) and three nitrogen levels (120, 160 and 200 kg/ha) on yield and yield attribute of hybrid maize (Zea mays L.) varieties Gaurav, (a Nepali hybrid) and Rajkumar (an Indian hybrid). The results showed that plant height increases with increasing plant density and nitrogen level. Similarly, phenology was not influenced by the densities whereas variety and nitrogen levels had a significant effect on tasseling, silking and physiological maturity. Plant density of 66,666 plants/ha produced the higher grain yield (11.19 t/ha) compared to that of 55,555 plants/ha (9.52 t/ha). However, grain yield at 66,666 plants/ha did not show a significant difference with that of 83,333 plants/ha (10.54 t/ha). Increasing plant density from 55,555 plants/ha to 83,333 plants/ha had increased the stover yield, whereas, the Harvest Index (HI) and grain stover ratio were not significantly influenced by plant densities. Similarly, 200 kg/ha N application produced a higher grain yield (10.9 t/ha) than 120 kg/ha N application (9.76 t/ha), but was in par with 160 kg/ha N application (10.59 t/ha). The yield of the two hybrid maize varieties had no significant difference. Plant density with 66,666 plants/ha and 160 kg/ha N application was the most appropriate for inner terai environments of Nepal during winter season.Tropical Agricultural Research Vol. 23 (3): 218-227 (2012)DOI: http://dx.doi.org/10.4038/tar.v23i3.4659
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Claims 12
Claim · model-written summary
Plant height increased with planting density.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant height increases with increasing plant density and nitrogen level”
t0“Hybrid Maize”
Claim · model-written summary
Plant height increased with nitrogen level.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant height increases with increasing plant density and nitrogen level”
t0“Hybrid Maize”
Claim · model-written summary
Planting density did not influence phenology.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“phenology was not influenced by the densities”
t0“Hybrid Maize”
Claim · model-written summary
Variety and nitrogen level significantly affected tasseling, silking and maturity.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“variety and nitrogen levels had a significant effect on tasseling, silking and physiological maturity”
t0“Hybrid Maize”
Claim · model-written summary
Density of 66,666 plants/ha yielded 11.19 t/ha, higher than 55,555 plants/ha.
- Treatment
- 66,666 plants/hae0
- Outcome
- grain yielde0
- Direction
- highere0
- Value
- 11.19 t/hae0
- Qualifier
- 9.52 t/hae0
- Comparator
- 55,555 plants/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant density of 66,666 plants/ha produced the higher grain yield (11.19 t/ha) compared to that of 55,555 plants/ha (9.52 t/ha)”
t0“Hybrid Maize”
Claim · model-written summary
Grain yield at 66,666 and 83,333 plants/ha was not significantly different.
- Treatment
- 66,666 plants/hae0
- Outcome
- grain yielde0
- Direction
- did not show a significant differencee0
- Comparator
- 83,333 plants/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grain yield at 66,666 plants/ha did not show a significant difference with that of 83,333 plants/ha (10.54 t/ha)”
t0“Hybrid Maize”
Claim · model-written summary
Higher planting density increased stover yield.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing plant density from 55,555 plants/ha to 83,333 plants/ha had increased the stover yield”
t0“Hybrid Maize”
Claim · model-written summary
Density did not significantly influence harvest index or grain stover ratio.
- Treatment
- plant densitiese0
- Outcome
- Harvest Index (HI) and grain stover ratioe0
- Direction
- not significantly influencede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Harvest Index (HI) and grain stover ratio were not significantly influenced by plant densities”
t0“Hybrid Maize”
Claim · model-written summary
200 kg/ha nitrogen yielded 10.9 t/ha, higher than 120 kg/ha.
- Treatment
- 200 kg/ha N applicatione0
- Outcome
- grain yielde0
- Direction
- highere0
- Value
- 10.9 t/hae0
- Qualifier
- 9.76 t/hae0
- Comparator
- 120 kg/ha N applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“200 kg/ha N application produced a higher grain yield (10.9 t/ha) than 120 kg/ha N application (9.76 t/ha)”
t0“Hybrid Maize”
Claim · model-written summary
Yield at 200 kg/ha nitrogen was at par with 160 kg/ha.
- Treatment
- 200 kg/ha N applicatione0
- Outcome
- grain yielde0
- Direction
- in pare0
- Comparator
- 160 kg/ha N applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“200 kg/ha N application produced a higher grain yield (10.9 t/ha) than 120 kg/ha N application (9.76 t/ha), but was in par with 160 kg/ha N application (10.59 t/ha)”
t0“Hybrid Maize”
Claim · model-written summary
The two hybrid varieties did not differ significantly in yield.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield of the two hybrid maize varieties had no significant difference”
Claim · model-written summary
The authors recommended 66,666 plants/ha and 160 kg/ha nitrogen in winter inner terai.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant density with 66,666 plants/ha and 160 kg/ha N application was the most appropriate for inner terai environments of Nepal during winter season”
t0“Hybrid Maize”
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