Effects of transplanting time and nitrogen application on the yield and quality of ‘Yamadanishiki’ rice variety of suitable for brewing
2019
Maeoka, Y. | Kaneko, K. | Nakano, K. | Ikejiri, A. | Jinnouchi, T. | Ariyoshi, M. | Nakashima, K.
We examined the effects of planting time, the amount of basal fertilizer applied, and the combinations and amounts of topdressing applied at the panicle formation stage on the production quality and quantity of ‘Yamadanishiki’ brewer rice to standardize these parameters. We established that the optimal planting time was 10 days around June 10, because later transplanting caused excessive spikelet formation and poor ripening. There was no difference in yield and quality when compared between nitrogen application rates of 0 kg/10a and 2 kg/10a as basal fertilizer. Topdressing at 20 days before heading was the most important, because the white core occurrence rate, whole grain formation rate, and number of spikelets formed tended to increase with fertilizer application. Finally, as a measure of the effectiveness of fertilizer application, we determined the SPAD value and the number of stems at the panicle formation stage to ensure kernel quality within grade one at inspection of agricultural products and a yield of over 420 kg/10a.
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