Title: Effects of Nitrogen Fertilizer Application Schemes on Spring Maize(Zea mays L.) Photosynthetic Characteristics under Hyper-yield Cultivation
Abstract: [Objective]The aim was to study the effects of nitrogen application schemes on spring maize photosynthetic characteristics under hyper-yield cultivation.[Method]Jinshan 27 was used as material to study the influences of nitrogen application schemes on spring maize photosynthetic characteristics under hyper-yield cultivation in Xiliao river plain in 2009-2010.[Result]The results showed that under different N-fertilizer treatments,net photosynthetic rate,transpiration rate,stomatal conductance and photosynthetic capacity per plant of maize with the lapse of the growth period appeared increasing first and decreasing afterwards that at silking stage reached the maximum of each index.Net photosynthetic rate,transpiration rate,stomatal conductance and photosynthetic capacity in plant treated with the Opt N condition were the highest,those of CK were the lowest and the others were between them at different growth stages.The instantaneous solar use efficiency and the instantaneous water use efficiency of appeared increasing with the lapse of the growth period,and the instantaneous solar use efficiency difference among different treatments increased with the lapse of the growth period,while the instantaneous water use efficiency of difference among different treatments changed a little with the lapse of the growth period.The instantaneous solar use efficiency and the instantaneous water use efficiency of maize treated with the Opt N condition were the highest,those of CK were the lowest.The yield of maize treated with the Opt N condition in two years were the highest,that of treated with 130% Opt N condition was the second,that of CK was the lowest.The correlation between yield and transpiration rate under different treatments in all lapse of the growth period had a very significant difference,and it had significant or very significant correlation with the single photosynthetic capacity and the instantaneous solar use efficiency.[Conclusion]The treatment of Opt N(The optimized nitrogen fertilizer was 300 kg / hm2,and the ratio of the seed fertilizer,the jointing fertilizer and the big bell mouth fertilizer was 1∶3∶6) is a suitable nitrogen fertilizer management mode for maize super high yield production in test area.
Publication Year: 2012
Publication Date: 2012-01-01
Language: en
Type: article
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