| Effects of different nitrogen fertilizer ratio on key enzymes activities of carbon metabolism and forage rice yield under water-saving condition |
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| DOI：10.7606/j.issn.1000-7601.2008.05.08 |
| Key Words: rice sucrose phosphate synthase(SPS) sucrose synthase(SUS) ADP glucose pyrophosphorylase(ADPase) photosynthesis yield |
| Author Name | Affiliation | | XIE Guixian | College of Resource & Environment, Hunan Agriculture University, Changsha, Hu'nan 410128, China | | LIU Qiang | College of Resource & Environment, Hunan Agriculture University, Changsha, Hu'nan 410128, China | | RONG Xiangmin | College of Resource & Environment, Hunan Agriculture University, Changsha, Hu'nan 410128, China | | SONG Haixing | College of Resource & Environment, Hunan Agriculture University, Changsha, Hu'nan 410128, China | | PENG Jianwei | College of Resource & Environment, Hunan Agriculture University, Changsha, Hu'nan 410128, China | | ZHU Hongmei | College of Resource & Environment, Hunan Agriculture University, Changsha, Hu'nan 410128, China |
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| Abstract: |
| Field experiment combining with laboratory analysis were conducted to study the effects of three different nitrogen ratio fertilizer methods (medium nitrogen ratio fertilizer method—the ratio of N, P2O5, K2O is 190, 90, 100 kg·hm-2, high nitrogen ratio fertilizer method—N, P2O5, K2O is 210, 90, 100 kg·hm-2 and low nitrogen ratio fertilizer method—N, P2O5, K2O is 170, 90, 100 kg·hm-2) on key enzymes activities of carbon metabolism and forage rice (Weiyou 198) yield under water saving condition in 2003 in Changsha city. The results showed that, the activities of sucrose phosphate synthase(SPS), sucrose synthase(SUS) and ADP-glucose pyrophosphorylase(ADPase) in flag leaves and grains, the net photosy nthesis rate in flag leaves, the content of sucrose in flag leaves and grains, the ability of sucrose was converted into starch were improved significantly by medium nitrogen ratio fertilizer method compared with those of High Nitrogen Ratio fertilizer method and Low Nitrogen Ratio fertilizer method. In compared with the high nitrogen ratio fertilizer method treatment and low nitrogen ratio fertilizer method treatment, the effective spikes under medium nitrogen ratio fertilizer method were increased by 7.70% and 10.32%, and grains yield were increased by 12.02% and 8.47%, respectively. The medium nitrogen ratio fertilization method was suitable for high protein forage rice cultivation. |
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