| Effects of nitrogen application on physiological characteristics of different genotypic summer maize |
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| DOI：10.7606/j.issn.1000-7601.2010.06.15 |
| Key Words: nitrogen application genotype summer maize physiological characteristics |
| Author Name | Affiliation | | XU Xiangyu | College of Resources and Enirorment, Northwvest A & F Universiy, Yangling, Shannxi 712100, China
Institue of Plant Protection and Soil Science，Hubei Academy of Agriculural Sciences, Wuhan, Hubei 430064，China | | ZHANG Minmin | College of Resources and Enirorment, Northwvest A & F Universiy, Yangling, Shannxi 712100, China
Institue of Plant Protection and Soil Science，Hubei Academy of Agriculural Sciences, Wuhan, Hubei 430064，China | | ZHAI Bingnian | College of Resources and Enirorment, Northwvest A & F Universiy, Yangling, Shannxi 712100, China | | LI Shengxiu | College of Resources and Enirorment, Northwvest A & F Universiy, Yangling, Shannxi 712100, China |
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| Abstract: |
| An experiment was carried out to study the differences of the effects of nitrogen application on physiologi-
cal characteristics of different genotypic summer maize (Shandan16(SD16)，Shandan9(SD9)，Hudan4(HD4)，Shanzi1 (SZ1), Yedan19(YD19), Zhongdan2(ZD2), Yuyu22( YY22), Shandan902(SD902), Nongda108 (ND108) and Hu-
dan2000(HD2000) under low N level (0 kg/hm2) and high N level (240 kg/hm2) in Hongyou soil of the south Loess Plateau. The results show that employing nitrogen can prominently increases the NR content by 2.63 times, the chloro-phyll content of spike leaf by 27.7% and photosynthetic rate by 25%; There are diverse responses of physiological char-acteristics of different genotypes to nitrogen fertilizer, and coefficient of variation of the chlorophyll content is 21%; The photosynthetic rate of ZD2 is slightly declined after employing nitrogen fertilizer, but that of ND108 is increased by 56% and SD16 by 46%; Meanwhile, no matter how high the nitrogen level is, there is significant correlation between Gs, Pn and Tr each other. |
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