| Response of growth and physiological characteristics of Xanthoceras sorbifolium seedlings to water\|fertilizer coupling treatment |
|
View Fulltext View/Add Comment Download reader |
| |
| DOI：10.7606/j.issn.1000-7601.2026.04.19 |
| Key Words: Xanthoceras sorbifolium water\|fertilizer coupling growth increment physiological characteristics comprehensive evaluation |
| Author Name | Affiliation | | ZHAO Tong | Gansu Academy of Forestry Sciences, Lanzhou, Gansu 730020, China
Gansu Woody Oil Engineering Research Center, Lanzhou, Gansu 730020, China | | ZHAO Junying | Gansu Academy of Forestry Sciences, Lanzhou, Gansu 730020, China
Gansu Woody Oil Engineering Research Center, Lanzhou, Gansu 730020, China | | CHAI Chunshan | Gansu Academy of Forestry Sciences, Lanzhou, Gansu 730020, China
Gansu Woody Oil Engineering Research Center, Lanzhou, Gansu 730020, China | | ZUO Longgang | Gansu Academy of Forestry Sciences, Lanzhou, Gansu 730020, China
Gansu Woody Oil Engineering Research Center, Lanzhou, Gansu 730020, China |
|
| Hits: 13 |
| Download times: 3 |
| Abstract: |
| To reveal the effects of water\|fertilizer coupling on the growth and physiological characteristics of Xanthoceras sorbifolium seedlings, one\|year\|old X. sorbifolium seedlings were used as experimental material. A two\|factor orthogonal experiment was conducted with 12 treatments, comprising three water gradients (25%-35%, 50%-60%, and 75%-85% of field capacity, defined as low, medium, and high water treatments, respectively) and four fertilizer levels (N-P2O5-K2O application rates of 0-0-0 g, 2-1-1.5 g, 4-2-3 g, and 6-3-4.5 g). The growth indicators (plant height, ground diameter, and biomass) and physiological parameters (photosynthetic characteristics, photosynthetic pigment content, antioxidant enzyme activity, and osmotic regulatory substances) of seedlings were determined, and a comprehensive evaluation was conducted. The results showed that the fresh biomass (23.02 g) and Dickson Quality Index (DQI, 49.65) were both the highest under the medium water and high fertilizer treatment (T7). The seedling height (95.11 cm) and crown width increment (43.31 cm) were the highest under the high water and high fertilizer treatment (T12), but the DQI was the lowest (17.23). In August, the net photosynthetic rate (15.13 μmol·m-2·s-1), stomatal conductance (0.33 mmol·m-2·s-1), chlorophyll a content (2.99 mg·g-1), proline (44.87 μg·g-1), and soluble sugar (18.85 mg·g-1) were the highest under the T7 treatment, while the intercellular CO2 concentration was the lowest (227 μmol·mol-1), but there was no significant differences in water use efficiency (WUE) between treatments. The comprehensive evaluation results indicate that T7 (medium water\|fertilizer) and T6 (medium water low fertilizer) treatments are the optimal water\|fertilizer coupling modes. |
|
|
|