Abstract
Low plant population and inadequate fertilizer application are constraints for maize production among farmers in Nepal. In order to identify the integrated effects of plant density and fertilizer dose for production of hybrid maize, series of on station experiments were carried out at Rampur, Chitwan, Nepal using strip plot design with three replications during winter seasons in two consecutive years 2016/17 and 2017/18. Two promising Nepalese hybrids namely RML-95/RML-96 and RML-86/RML-96 were taken as vertical factor whereas five densities viz. 55,555 ha-1(D1), 66,666 ha-1 (D2), 77,519 ha-1 (D3), 87,719 ha-1 (D4) and 98,039 ha-1 (D5) in combination with two doses of NPK fertilizers i.e. recommended and rational as horizontal factor. Recommended dose of NPK for maize was 120:60:40 kg ha-1 and the rational doses for above mentioned densities were calculated based on bench mark of fertilizer recommendation for 53,333 plants ha-1. Derived rational doses of NPK for D1, D2, D3, D4 and D5 were 125:63:42, 150:75:50, 174:87:58, 197:99:66, 221:110:74 kg ha-1 respectively. Genotypic variation of two tested hybrids for growth, yield attributes and grain yield were found statistically similar. However, planting the hybrids in various densities and fertilizer doses significantly influenced grain yield ranging from 5.63 to 7.91 t ha-1. Significantly higher grain yield (7.91 t ha-1) and benefit cost ratio (2.21) were observed when plant population was maintained at 77,519 ha-1 with fertilizer dose 174:87:58 NPK kg ha-1. Applying fertilizer as rational dose enhanced the yield up to the density of 77519 plants ha-1 then the yield gradually declined as the density increased. Whereas recommended dose of fertilizer with increasing plant density from 55,555 to 87,719 ha-1 had statistically similar yield and declined more at 98039 ha-1. The present recommended dose of fertilizer application is inadequate for higher plant density to increase the grain yield of hybrid maize
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Claims 8
Claim · model-written summary
The two maize hybrids had statistically similar growth, yield attributes and grain yield.
- Material
- two tested hybridse0
- Outcome
- growth, yield attributes and grain yielde0
- Direction
- statistically similare0
Not reportedTaxon
Verbatim
e0“Genotypic variation of two tested hybrids for growth, yield attributes and grain yield were found statistically similar.”
Claim · model-written summary
Plant density and fertilizer dose significantly influenced maize grain yield, which ranged from 5.63 to 7.91 t ha-1.
Zea maysNot reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“planting the hybrids in various densities and fertilizer doses significantly influenced grain yield ranging from 5.63 to 7.91 t ha-1”
t0“maize hybrids”
Claim · model-written summary
At 77,519 plants ha-1 with 174:87:58 NPK kg ha-1, maize grain yield reached 7.91 t ha-1, significantly higher than other treatments.
- Treatment
- 77,519 ha-1 with fertilizer dose 174:87:58 NPK kg ha-1e0
- Outcome
- grain yielde0
- Direction
- Significantly highere0
- Value
- 7.91 t ha-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significantly higher grain yield (7.91 t ha-1) and benefit cost ratio (2.21) were observed when plant population was maintained at 77,519 ha-1 with fertilizer dose 174:87:58 NPK kg ha-1.”
t0“maize hybrids”
Claim · model-written summary
At 77,519 plants ha-1 with 174:87:58 NPK kg ha-1, the benefit cost ratio was 2.21.
- Treatment
- 77,519 ha-1 with fertilizer dose 174:87:58 NPK kg ha-1e0
- Outcome
- benefit cost ratioe0
- Value
- 2.21e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“benefit cost ratio (2.21) were observed when plant population was maintained at 77,519 ha-1 with fertilizer dose 174:87:58 NPK kg ha-1”
t0“maize hybrids”
Claim · model-written summary
Under rational fertilizer doses, maize yield rose up to 77519 plants ha-1 and then declined at higher density.
- Treatment
- fertilizer as rational dosee0
- Outcome
- yielde0
- Direction
- enhancede0
- Qualifier
- up to the density of 77519 plants ha-1 then the yield gradually declined as the density increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applying fertilizer as rational dose enhanced the yield up to the density of 77519 plants ha-1 then the yield gradually declined as the density increased.”
t0“maize hybrids”
Claim · model-written summary
Under the recommended fertilizer dose, maize yield was statistically similar from densities 55,555 to 87,719 ha-1.
- Treatment
- recommended dose of fertilizer with increasing plant density from 55,555 to 87,719 ha-1e0
- Outcome
- yielde0
- Direction
- statistically similare0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“recommended dose of fertilizer with increasing plant density from 55,555 to 87,719 ha-1 had statistically similar yield”
t0“maize hybrids”
Claim · model-written summary
Under the recommended fertilizer dose, maize yield declined at 98039 ha-1.
- Treatment
- recommended dose of fertilizere0
- Outcome
- yielde0
- Direction
- declined moree0
- Qualifier
- 98039 ha-1e0
- Comparator
- 55,555 to 87,719 ha-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“recommended dose of fertilizer with increasing plant density from 55,555 to 87,719 ha-1 had statistically similar yield and declined more at 98039 ha-1”
t0“maize hybrids”
Claim · model-written summary
The authors conclude that the recommended fertilizer dose is inadequate to increase hybrid maize grain yield at higher planting densities.
- Outcome
- recommended dose of fertilizer application is inadequate for higher plant density to increase the grain yielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The present recommended dose of fertilizer application is inadequate for higher plant density to increase the grain yield of hybrid maize”
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