| Effects of nitrogen localized supply on physiological response and yield of maize |
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| DOI：10.7606/j.issn.1000-7601.2008.04.10 |
| Key Words: fertilization method MDA POD yield maize |
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| Abstract: |
| By field experiment effects of methods and quantities of N fertilization on the activity of Peroxidase （POD） and amount of malondialdehyde （MDA） in leaf during the flowering stage and yield of maize were studied．N fertilizer was supplied to two sides of maize row （conventional fertilization CF） or to one side only （fixed partial root zone fertilization FPRF） or alternatively to both sides （alternate partial root zone fertilization APRF）．The quantities of N fertilizer included low medium and high levels．The results showed that the amount of MDA in leaf increased significantly for FPRF treatment but decreased for APRF treatment when compared to that of CF treatment．The activity of POD was higher for APRF than for CF under all three fertilization levels．As for FPRF treatment the activity of POD was higher under high level but there were no statistically significant differences under low and medium levels．With N fertilization increasing the amount of MDA in leaf decreased but the activity of POD rose for all three fertilization levels．The100-seed weight was significantly enhanced for APRF under all three fertilization levels but for FPRF only under high level when compared to that of CF treatment．Both two methods of nitrogen localized supply increased significantly maize yield when compared with that of CF and the increase for APRF was more significant． |