Effects of Time of Second Nitrogen Application on Growth and Development of Rice Plants
Pot and field experiments were conducted to study the effect of different times of second nitrogen (N) application on growth, yield, protein content of grain and milling quality of rice (Oryza sativa L variety Seberang). Second N application was carried out at three-day intervals from 39 to 78 a...
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| Format: | Thesis |
| Language: | English English |
| Published: |
1987
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/10221/1/FP_1987_3_A.pdf |
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| Summary: | Pot and field experiments were conducted to study the
effect of different times of second nitrogen (N) application on
growth, yield, protein content of grain and milling quality of
rice (Oryza sativa L variety Seberang). Second N application
was carried out at three-day intervals from 39 to 78 and 39 to
81 days after transplanting in pot and field experiments,
respectively. Experimental design used was a randomized
complete block design with treatments replicated three times.
In the pot experiment, significantly higher yields were
obtained from second N application made from late vegetative (39 days after transplanting) to late primary rachis branch
differentiating stage (48 days after transplanting) and at
middle stage of spike let differentiation (57 days after
transplanting). Time of second N application had no significant
effect on grain yield in the field but second N applied at
panicle initiation stage (45 days after transplanting) resulted
in the highest grain yield. In the field, second N application
made from late vegetative to late primary rachis branch
differentiating stage and from extine formation stage (66 days
after transplanting) onwards significantly increased panicle
number and percentage of filled grains, respectively. |
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