The early growth performances of Pinus densiflora and Larix kaempferi seedlings under open-field experimental warming and precipitation manipulation
This study aimed to investigate the effects of climate change on the survival and growth performance of <i>Pinus densiflora </i>and <i>Larix kaempferi </i>seedlings using open-field experimental warming and precipitation manipulation. We measured the survival rate, root-collar diameter, and height, and then calculated the seedling quality index (SQI) of 2-year-old seedlings under 6 treatments [2 temperatures (TC: Control; TW: Warming) × 3 precipitation manipulations (PC: Control; PD: Decreased; PI: Increased)] and performed a two-way ANOVA to test for differences. The air temperature of the warming plots was 3°C higher than that of the control plots, while the precipitation manipulation plots received ±40% of the precipitation received by the control plots. Temperature and precipitation treatments did not significantly affect the survival rate of <i>P. densiflora</i>; however, the SQI of <i>P. densiflora </i>decreased with increasing precipitation. In contrast, the mortality rate of <i>L. kaempferi </i>increased with increasing temperature and decreasing precipitation. Furthermore, in <i>L. kaempferi, </i>TC × PI treatment resulted in the lowest SQI with a significant interaction effect observed between the two factors. In summary, low seedling production and quality should be expected in <i>P. densiflora </i>as precipitation increases and in <i>L. kaempferi </i>as temperature increases or precipitation decreases. These results indicate species-specific sensitivities to climate change of two plant species at the nursery stage. With the occurrence of global warming, the frequencies of drought and heavy rainfall events are increased, and this could affect the survival and seedling quality of tree species. Therefore, it is necessary to improve nursery techniques by establishing new adaptation strategies based on species-specific growth performance responses. 1) Keywords: Climate change ID: 3622385
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| Format: | Document biblioteca |
| Language: | English |
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FAO ;
2022
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| Online Access: | https://openknowledge.fao.org/handle/20.500.14283/CC2644EN http://www.fao.org/3/cc2644en/cc2644en.pdf |
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