Effects of urea application on rice growth in a cold area

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  • 寒地北海道における水稲への尿素の側条施肥
  • カンチ ホッカイドウ ニ オケル スイトウ エ ノ ニョウソ ノ ガワジョウ セヒ

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This study was conducted to clarify the effects of side dressing with a urea nitrogen fertilizer on rice growth over 2 successive years. When urea was side dressed on the paddy rice, the number of tillers was higher in comparison to paddy rice without the urea side dressing starting at 15 days after transplanting, and the grain yield increased due to the higher number of spikelets per square meter. The milled rice protein contents were lower in the rice grown with the urea side dressing. Therefore, we concluded that the plant growth and grain yield of paddy rice were comparable between the rice grown with the urea side dressing and that grown with an ammonium side dressing.

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