Section 6
Chapter 5,097

Deeper layer application of additional nitrogen fertilizer for rice plant 2. relationships between the depth of application of top dressing and growth and yield of rice plants

Okumura, T.; Takeuchi, S.; Hasegawa, H.

Japanese Journal of Crop Science 51(1): 58-64


Accession: 005096735

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Experimental plots consisted of 2 plots differing in placement of top dressing: soil surface layer (S plot) and deep layer (D plot). The growth pattern of tops and yields were compared. The number of spikelets per square meter and yield in D plot were 35% and 6% greater than those in S plot, respectively. The dry matter increase of leaves and stems in D plot increased until heading time, until 10 days before heading time in S plot. The maximum LAI was 6.0 in D plot and 5.8 in S plot. In D plot, the tops size was larger and the productive structure was better than those in S plot. The higher N content of leaves was maintained throughout the ripening period; the duration of botton leaves was longer, and the percentage of fruitful stems was higher than those in S plot. The effects of the deeper application of additional N fertilizer apparently brought about by the autumn vigor of growth due to less root-rotting.

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