Effects of magnesium fertilizer on photosystem Ⅱ chlorophyll fluorescence characteristics of functional leaves in maize
Using maize hybrids Shenyu 21 and Dongdan 90 as entries, the effects of magnesium fertilizer on photosystem Ⅱ (PS Ⅱ) chlorophyll fluorescence characteristics of maize were studied through measuring chlorophyll fluorescence parameters such as ABS/RC, ET<sub>0</sub>/RC, TR<sub>0</...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Zhejiang University Press
2011-09-01
|
| Series: | 浙江大学学报. 农业与生命科学版 |
| Subjects: | |
| Online Access: | https://www.academax.com/doi/10.3785/j.issn.1008-9209.2011.05.011 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Using maize hybrids Shenyu 21 and Dongdan 90 as entries, the effects of magnesium fertilizer on photosystem Ⅱ (PS Ⅱ) chlorophyll fluorescence characteristics of maize were studied through measuring chlorophyll fluorescence parameters such as ABS/RC, ET<sub>0</sub>/RC, TR<sub>0</sub>/RC, M<sub>0</sub>, S<sub>m</sub> and φE<sub>0</sub> in six magnesium fertilizer levels (0, 22.5, 45, 67.5, 90, and 112.5 kg·hm<sup>-2</sup>). The results showed that, compared with the control, the chlorophyll fluorescence parameters in Shenyu 21 increased significantly or highly significantly when the magnesium fertilizer amounts ranged from 45 to 67.5 kg·hm<sup>-2</sup>. The magnesium fertilizer did not affect or decreased the parameters beside φE<sub>0</sub> when the fertilizer level was more than 67.5 kg·hm<sup>-2</sup>. As for Dongdan 90, the chlorophyll fluorescence parameters increased significantly or highly significantly at the application amounts of magnesium fertilizer between 67.5 and 90.0 kg·hm<sup>-2</sup>, but changed less beside the parameter of TR<sub>0</sub> /RC when the fertilizer amount was less than 67.5 kg·hm<sup>-2</sup>, compared with control. Therefore, the PS Ⅱ linear electron transfer efficiency could be promoted, and assimilatory ability could be increased, and light utilization efficiency could be enhanced under the magnesium fertilizer levels of 45-67.5 kg·hm<sup>-2</sup> in Shenyu 21 or 67.5-90 kg·hm<sup>-2</sup> in Dongdan 90. |
|---|---|
| ISSN: | 1008-9209 2097-5155 |