[article]
| Title : |
Nitrogen levels influence barrenness and sterility of maize varieties under different establishment methods during hot spring in western Terai of Nepal |
| Material Type: |
printed text |
| Authors: |
S. Marahatta, Author |
| Publication Date: |
2020 |
| Article on page: |
117-127 p. |
| Languages : |
English (eng) |
| Keywords: |
Conservation agriculture, barrenness, sterility, nitrogen levels |
| Abstract: |
The national average yield of maize is less than its potential yield in Nepal mainly due to poor agronomic management and
adverse climatic conditions. The effect of no-tillage combined with retention of previous crop residues and varying nitrogen
fertilizer levels on barrenness, sterility, and yield of open pollinated (OP), and hybrid maize varieties were analyzed in the
Western Terai region of Nepal during 2011 and 2012. The treatments included factorial combinations of two establishment
methods, (a) conservation agriculture (CA; i.e., no-till with crop residue retention from previous crops) and (b) conventional
practice (i.e., conventional tillage without residue retention); two varieties (OP ‘Rampur Composite’ and hybrid ‘Rajkumar);
and four N fertilizer levels [(0, 60, 120 and 180 kg ha-1 (during 2011), and 0, 80, 160 and 240 kg ha-1 (during 2012)] arranged
in strip plot design to grow maize under rice-mustard-maize cropping system with three replications. Data on sterility,
barrenness and yield were analyzed by using R Studio. The effect of barrenness and sterility on the grain yield was negative
and significant during both the years. Both barrenness and sterility were higher (by 58.28 and 12.35%, respectively) in 2012
as compared to the 2011, also due to higher temperature and low rainfall. Higher nitrogen uptake under CA resulted the lower
barrenness and sterility percentage, and hence the higher grains yield (9%). Barrenness did not effect by varieties (p>0.05),
but the sterility (p
than OP Rampur Composite, resulting higher grains yield. The nitrogen uptake was significant and negatively correlated
with sterility percentage. Both barrenness and sterility significantly decreased linearly with increasing the nitrogen levels
while barrenness was drastically reduced as compared to the sterility. Hybrid Rajkumar had higher nitrogen uptake than OP
Rampur Composite resulting lower sterility even under the nitrogen omission. Hybrid Rajkumar was more stable than OP
Rampur Composite with low nitrogen application, high temperature and drought resulting- lower barrenness, sterility, and
thus the high grain yield. |
| Link for e-copy: |
https://afu.edu.np/sites/default/files/Nitrogen%20levels%20influence%20barrennes [...] |
in Journal of Agriculture and Forestry University > Volume 4 (2020) . - 117-127 p.
[article] Nitrogen levels influence barrenness and sterility of maize varieties under different establishment methods during hot spring in western Terai of Nepal [printed text] / S. Marahatta, Author . - 2020 . - 117-127 p. Languages : English ( eng) in Journal of Agriculture and Forestry University > Volume 4 (2020) . - 117-127 p.
| Keywords: |
Conservation agriculture, barrenness, sterility, nitrogen levels |
| Abstract: |
The national average yield of maize is less than its potential yield in Nepal mainly due to poor agronomic management and
adverse climatic conditions. The effect of no-tillage combined with retention of previous crop residues and varying nitrogen
fertilizer levels on barrenness, sterility, and yield of open pollinated (OP), and hybrid maize varieties were analyzed in the
Western Terai region of Nepal during 2011 and 2012. The treatments included factorial combinations of two establishment
methods, (a) conservation agriculture (CA; i.e., no-till with crop residue retention from previous crops) and (b) conventional
practice (i.e., conventional tillage without residue retention); two varieties (OP ‘Rampur Composite’ and hybrid ‘Rajkumar);
and four N fertilizer levels [(0, 60, 120 and 180 kg ha-1 (during 2011), and 0, 80, 160 and 240 kg ha-1 (during 2012)] arranged
in strip plot design to grow maize under rice-mustard-maize cropping system with three replications. Data on sterility,
barrenness and yield were analyzed by using R Studio. The effect of barrenness and sterility on the grain yield was negative
and significant during both the years. Both barrenness and sterility were higher (by 58.28 and 12.35%, respectively) in 2012
as compared to the 2011, also due to higher temperature and low rainfall. Higher nitrogen uptake under CA resulted the lower
barrenness and sterility percentage, and hence the higher grains yield (9%). Barrenness did not effect by varieties (p>0.05),
but the sterility (p
than OP Rampur Composite, resulting higher grains yield. The nitrogen uptake was significant and negatively correlated
with sterility percentage. Both barrenness and sterility significantly decreased linearly with increasing the nitrogen levels
while barrenness was drastically reduced as compared to the sterility. Hybrid Rajkumar had higher nitrogen uptake than OP
Rampur Composite resulting lower sterility even under the nitrogen omission. Hybrid Rajkumar was more stable than OP
Rampur Composite with low nitrogen application, high temperature and drought resulting- lower barrenness, sterility, and
thus the high grain yield. |
| Link for e-copy: |
https://afu.edu.np/sites/default/files/Nitrogen%20levels%20influence%20barrennes [...] |
|
Nitrogen levels influence barrenness and sterility of maize varieties under different establishment methods during hot spring in western Terai of Nepal in Journal of Agriculture and Forestry University, Volume 4 (2020)
