Near-Earth Remote Sensing Images Used to Determine the Phenological Characteristics of the Canopy of <i>Populus tomentosa</i> B301 under Three Methods of Irrigation
Due to global warming, changes in plant phenology such as an early leaf spreading period in spring, a late abscission period in autumn, and growing season extension are commonly seen. Here, near-earth remote sensing images were used to monitor the canopy phenology of <i>Populus tomentosa</i...
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MDPI AG
2022-06-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/14/12/2844 |
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| author | Peng Guan Yili Zheng Guannan Lei Yang Liu Lichen Zhu Youzheng Guo Yirui Wang Benye Xi |
| author_facet | Peng Guan Yili Zheng Guannan Lei Yang Liu Lichen Zhu Youzheng Guo Yirui Wang Benye Xi |
| author_sort | Peng Guan |
| collection | DOAJ |
| description | Due to global warming, changes in plant phenology such as an early leaf spreading period in spring, a late abscission period in autumn, and growing season extension are commonly seen. Here, near-earth remote sensing images were used to monitor the canopy phenology of <i>Populus tomentosa</i> B301 in planted forests under full drip irrigation, full furrow irrigation, and no irrigation (rain fed). Experiments were conducted to collect phenological data across a growing season. Continuous canopy images were used to calculate different vegetation indices; the key phenological period was determined via the double logistic model and the curvature method. The effects of irrigation methods and precipitation in the rainy season on tree growth changes and key phenological periods were analyzed. The results showed that: (1) The green chromatic coordinate (GCC) conformed to the vegetation index of the tree species canopy phenological study. (2) During the phenological period throughout the year, the GCC reaching peak time (MOE) of the canopy phenology of <i>Populus tomentosa</i> B301 was the same in the three methods, while the time of shedding at the end of the growing season without irrigation (preset point 1) was 8 days longer than with full drip irrigation (preset point 3), and 7 days faster than with full furrow irrigation (preset point 5). (3) In the preliminary rainy season, different irrigation volumes induced different growth changes and phenological periods of the trees, resulting in different data of vegetation indicators under different growth conditions. (4) During the rainy season, the precipitation had different effects on cultivating <i>P. tomentosa</i> B301 using the three methods, that is, high precipitation could increase the growth rate of the fully irrigated area, otherwise the growth rate of this tree species was increased in full drip irrigation areas. Precipitation was lower and irregular, and the growth rate of this species was faster than the other two irrigation methods in the non-irrigated area, which was more adaptable to external environmental changes. The internal growth mechanism of the phenological changes in different areas of the planted forests was influenced by the different cultivation methods. Moreover, the collected phenological data provide a basis for the study of plant phenology with large data sets and deepens our understanding of the phenology of planted forests in response to climate change. |
| first_indexed | 2024-03-09T22:36:55Z |
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| id | doaj.art-a93e7c05816744efa6836665b9d1eb97 |
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| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-09T22:36:55Z |
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| spelling | doaj.art-a93e7c05816744efa6836665b9d1eb972023-11-23T18:47:47ZengMDPI AGRemote Sensing2072-42922022-06-011412284410.3390/rs14122844Near-Earth Remote Sensing Images Used to Determine the Phenological Characteristics of the Canopy of <i>Populus tomentosa</i> B301 under Three Methods of IrrigationPeng Guan0Yili Zheng1Guannan Lei2Yang Liu3Lichen Zhu4Youzheng Guo5Yirui Wang6Benye Xi7School of Technology, Beijing Forestry University, Beijing 100083, ChinaSchool of Technology, Beijing Forestry University, Beijing 100083, ChinaSchool of Technology, Beijing Forestry University, Beijing 100083, ChinaMinistry of Education Key Laboratory of Silviculture and Conservation, Beijing Forestry University, Beijing 100083, ChinaSchool of Technology, Beijing Forestry University, Beijing 100083, ChinaMinistry of Education Key Laboratory of Silviculture and Conservation, Beijing Forestry University, Beijing 100083, ChinaChina Power (Beijing) Technology Development Co., Ltd., Beijing 100083, ChinaMinistry of Education Key Laboratory of Silviculture and Conservation, Beijing Forestry University, Beijing 100083, ChinaDue to global warming, changes in plant phenology such as an early leaf spreading period in spring, a late abscission period in autumn, and growing season extension are commonly seen. Here, near-earth remote sensing images were used to monitor the canopy phenology of <i>Populus tomentosa</i> B301 in planted forests under full drip irrigation, full furrow irrigation, and no irrigation (rain fed). Experiments were conducted to collect phenological data across a growing season. Continuous canopy images were used to calculate different vegetation indices; the key phenological period was determined via the double logistic model and the curvature method. The effects of irrigation methods and precipitation in the rainy season on tree growth changes and key phenological periods were analyzed. The results showed that: (1) The green chromatic coordinate (GCC) conformed to the vegetation index of the tree species canopy phenological study. (2) During the phenological period throughout the year, the GCC reaching peak time (MOE) of the canopy phenology of <i>Populus tomentosa</i> B301 was the same in the three methods, while the time of shedding at the end of the growing season without irrigation (preset point 1) was 8 days longer than with full drip irrigation (preset point 3), and 7 days faster than with full furrow irrigation (preset point 5). (3) In the preliminary rainy season, different irrigation volumes induced different growth changes and phenological periods of the trees, resulting in different data of vegetation indicators under different growth conditions. (4) During the rainy season, the precipitation had different effects on cultivating <i>P. tomentosa</i> B301 using the three methods, that is, high precipitation could increase the growth rate of the fully irrigated area, otherwise the growth rate of this tree species was increased in full drip irrigation areas. Precipitation was lower and irregular, and the growth rate of this species was faster than the other two irrigation methods in the non-irrigated area, which was more adaptable to external environmental changes. The internal growth mechanism of the phenological changes in different areas of the planted forests was influenced by the different cultivation methods. Moreover, the collected phenological data provide a basis for the study of plant phenology with large data sets and deepens our understanding of the phenology of planted forests in response to climate change.https://www.mdpi.com/2072-4292/14/12/2844<i>Populus tomentosa</i> B301near-Earth remote sensingcrown phenologyirrigation volumevegetation index |
| spellingShingle | Peng Guan Yili Zheng Guannan Lei Yang Liu Lichen Zhu Youzheng Guo Yirui Wang Benye Xi Near-Earth Remote Sensing Images Used to Determine the Phenological Characteristics of the Canopy of <i>Populus tomentosa</i> B301 under Three Methods of Irrigation Remote Sensing <i>Populus tomentosa</i> B301 near-Earth remote sensing crown phenology irrigation volume vegetation index |
| title | Near-Earth Remote Sensing Images Used to Determine the Phenological Characteristics of the Canopy of <i>Populus tomentosa</i> B301 under Three Methods of Irrigation |
| title_full | Near-Earth Remote Sensing Images Used to Determine the Phenological Characteristics of the Canopy of <i>Populus tomentosa</i> B301 under Three Methods of Irrigation |
| title_fullStr | Near-Earth Remote Sensing Images Used to Determine the Phenological Characteristics of the Canopy of <i>Populus tomentosa</i> B301 under Three Methods of Irrigation |
| title_full_unstemmed | Near-Earth Remote Sensing Images Used to Determine the Phenological Characteristics of the Canopy of <i>Populus tomentosa</i> B301 under Three Methods of Irrigation |
| title_short | Near-Earth Remote Sensing Images Used to Determine the Phenological Characteristics of the Canopy of <i>Populus tomentosa</i> B301 under Three Methods of Irrigation |
| title_sort | near earth remote sensing images used to determine the phenological characteristics of the canopy of i populus tomentosa i b301 under three methods of irrigation |
| topic | <i>Populus tomentosa</i> B301 near-Earth remote sensing crown phenology irrigation volume vegetation index |
| url | https://www.mdpi.com/2072-4292/14/12/2844 |
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