Title: Effects of Nitrogen Fertilizer Management on Yield and Nitrogen Use Efficiency of Eryou 498 in Triangle-Planted System of Rice Intensification
Abstract: Hybrid rice Eryou 498 was used to investigate the effects of nitrogen(N) fertilizer management on leaf area,photosynthetic rate in productive phase,and also dry-matter accumulation and its transportation in triangle-planted system of rice intensification(TSRI) with appropriate seedling age and density.At the same time,the effects of dry-matter accumulation before anthesis and its transportation and dry-matter accumulation after anthesis on yield formation were also explored a N fertilizer management which could both increase yield and reduce the N waste.The results showed that in TSRI N fertilizer management had significant effects on leaf area index(LAI) and photosynthetic rate except the LAI in waxy ripening stage;with the increase of N rate and postponing N application,net photosynthetic rate in flag leaf in full heading stage and waxy ripe stage increased significantly;LAI in productive phase exhibited a parabola mostly with the increase of N rate and postponing N application.In TSRI,N rate and ratio of application both enlarged total glumes to increase yield.At the same time,N rate enlarged 1000-grain weight and ratio of application improved seed-setting rate to increase yield respectively.In TSRI,dry-matter accumulation before anthesis,dry-matter of transportation,and transportation rate of dry-matter had significantly positive correlation with yield respectively.The treatment which N rate was 150 kg ha-1 and panicle fertilizer was 30% of the whole N fertilizer enlarged dry-matter accumulation before anthesis and dry-matter of transportation significantly to reach maximum yield.It also improved N agronomy efficiency and N physiology efficiency significantly,so it was the best combination which could both increase yield and reduce the waste of N fertilizer to the maximum degree.
Publication Year: 2012
Publication Date: 2012-01-01
Language: en
Type: article
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Cited By Count: 1
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