Splitting of Nitrogen Fertilizer Enhanced Growth, Yield Contributing Parameters and Yield of Aromatic Rice Varieties
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Anahtar Kelimeler:
Nitrogen fertilizer, split application, aromatic rice, yieldÖzet
Rice crop demands a heavy fertilization for better growth and yield. But improper timing of nitrogenous fertilizer application is the major constraint achieving higher yield of transplanted aman rice in Bangladesh. To solve this problem, a field experiment was carried out at the Department of Agronomy, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh during aman season (July to December, 2016) to study the effect of different split application of nitrogen (N) fertilizer on yield and yield attributes of aromatic rice. The experiment was laid out in a randomized complete block design with four split levels of N : (N1= ½ during final land preparation + ½ at 30 DAT, N2= 1/3 at 15 DAT + 1/3 at 30 DAT + 1/3 at 45 DAT, N3= 1/4 at 15 DAT + ½ at 30 DAT + 1/4 at 45 DAT and N4= 2/3 at 15 DAT + 1/3 at 45 DAT) on two popular aromatic rice varieties (Tulsimala and Badshabhog) of Bangladesh. Each treatment of the experiment was repeated four times and fertilizers in each plot were applied as per recommendation. Growth, yield contributing characteristics and yield both the varieties were significantly influenced by the splitting application of nitrogen. Nitrogen splitting influenced the plant height and N2 produced the longest plant but there was no varietal difference on the plant height. Yield contributing characteristics like tillers (total, effective, non-effective), panicle length, spikelets panicle-1, spikelet sterility, test weight were influenced by the treatments, and three equal split application of nitrogen (N2) showed superiority in almost all the studied traits which positively influenced the grain yield of rice. The variety Badshabhog demonstrated higher performance than the variety Tushimala regarding the growth and yield characteristics. The highest grain was recorded by the N2 and the lowest was in N1 treatments, and the variety Badshabhog produced higher grain yield than Tulshimala.
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