Title: Effect of Proportion of Nitrogen Fertilizer for Promoting Panicle Development on Nitrogen Uptake, Grain Amino Acid Contents and Grain Yield of Two-Line Hybrid Rice
Abstract:The field and pot experiments were conducted to study the effect of the allocating ratio of N-fertilizer on nitrogen uptake, grain amino acid contents and grain yield of two-line hybrid rice. For two-...The field and pot experiments were conducted to study the effect of the allocating ratio of N-fertilizer on nitrogen uptake, grain amino acid contents and grain yield of two-line hybrid rice. For two-line hybrid rice (early season),the grain yield at the treatment of N application of 180 kg/hm~2, 30% N for panicle development(applied at the flag leaf appearing in the main culm)and 70% N for basal fertilizer was the highest, and both increased by 6.2% compared to the treatments of the same N application (180 kg/hm~ 2 ) with 10% N for panicle development and N application of 120 kg/hm~ 2 with 30% N for panicle development. For late season, the N allocating ratio getting the highest yield at the N application of 210 kg/hm~ 2 was 30% N for panicle development, too. The result of three different N application levels showed that, the order of N recovery and agronomic efficiency was 30%20%10%, N use efficiency was 30%20%10%, at the treatment of different N allocating ratios. The essential amino acid contents in brown rice under the N allocating ratio of 30% for panicle development and 70% for basal fertilizer was increased by 0.09―0.38 percent point compared with other treatments of different N allocating ratios. Among the essential amino acid contents increased, Leu and Ile contents were increased the most, followed by the Lys content. The yield of brown rice, the accumulated amount of amino acids and essential amino acids under this treatment was also increased by 5.4%-27.5%, 5.4%-30.4% and 15.1%-36.0% compared with other treatments, respectively.Read More
Publication Year: 2006
Publication Date: 2006-01-01
Language: en
Type: article
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Cited By Count: 5
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