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Agronomic studies on regional difference in growth and yield of rice in the honam area south korea 2. the effect of nitrogen application and transplanting date on growth and yield in rice plant

Kim, C.K.; Kim, C.H.; Kim, J.K.

Research Reports of the Rural Development Administration 32(1 RICE): 47-64

1990

Accession: 006995274
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This study was carried out to investigate the effect of transplanting date and nitrogen level on the growth and yield of paddy rice in Iri and Kwangsan. Rice plant was transplanted at two dates; May 25 and June 15, with 3 nitrogen levels; 12, 15, 18 kg/10a in the Daecheongbyeo 15, 18, 21 kg/10a in the case of Pungsanbyeo. The results obtained were as follows: Leaf area index and dry matter weight were less in Kwangsan than in Iri during the whole growth duration and increased by heavy application of nitrogen in both locations. Crop Growth Rate (CGR) was lower in Kwangsan than in Iri during the whole growth duration. Maximum regional difference in CGR existed from panicle formation stage to heading stage. The effect of heavy application of nitrogen on increment of CGR was high in Kwangsan than in Iri. Leaf blade distributed the highest 30-70 cm, 40-80 cm above the ground in Iri and in Kwangsan, respectively. Absorbed amount of nitrogen and phosphoruous during the whole growth duration was lower in Kwangsan, and increased by heavy application of nitrogen in both locations. Number of panicles per hill and number of spikelets per panicle in Iri were high by 0.4 and 11, respectively, compared to in Kwangsan. Heavy application of nitrogen make increased number of panicles and spikelets except for the case of transplanted at May 25 in Iri. Filled grain ratio was higher in Kwangsan than in Iri, but 1,000 grain weight was reversed. Yield per 10a was lower in Kwangsan and increased by heavy application of nitrogen in both locations.

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Related References

Kim, C.K.; Kim, C.H.; Kim, J.K. 1990: Agronomic studies on regional difference in growth and yield of rice in the Honam area. 2. The effect of nitrogen application and transplanting date on growth and yield in rice plant Research Reports of the Rural Development Administration, Rice 32(1): 47-64
Kim, C.K.; Lee, S.Y.; Kim, J.K. 1990: Agronomic studies on regional difference in growth and yield of rice in the honam area south korea 1. the effect of planting densities and transplanting dates on growth and yield in rice plant Research Reports of the Rural Development Administration 32(1 RICE): 34-46
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