Acta Prataculturae Sinica ›› 2021, Vol. 30 ›› Issue (2): 82-92.DOI: 10.11686/cyxb2020099
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Wen-rong LUO1(), Guo-zheng HU1(), Ganjurjav H1, Qing-zhu GAO1, Yan LI1, Yi-qing Ge2, Yu LI3, Shi-cheng HE4, Luo-bu DANJIU4
Received:
2020-03-07
Revised:
2020-04-27
Online:
2021-02-20
Published:
2021-01-19
Contact:
Guo-zheng HU
Wen-rong LUO, Guo-zheng HU, Ganjurjav H, Qing-zhu GAO, Yan LI, Yi-qing Ge, Yu LI, Shi-cheng HE, Luo-bu DANJIU. Effects of simulated drought on plant phenology and productivity in an alpine meadow in Northern Tibet[J]. Acta Prataculturae Sinica, 2021, 30(2): 82-92.
处理 Treatments | 2016年 Year | 2017年 Year | ||
---|---|---|---|---|
截雨量 Intercepted rainfall (mm) | 全年占比 Percentage of annual rainfall (%) | 截雨量 Intercepted rainfall (mm) | 全年占比 Percentage of annual rainfall (%) | |
5-6月截雨棚Shelter on early growing season (SE) | 174.2 | 31.6 | 228.1 | 40.0 |
7-8月截雨棚Shelter on late growing season (SL) | 224.5 | 40.7 | 183.8 | 32.3 |
Table 1 Intercepted rainfall on each treatment in 2016 and 2017
处理 Treatments | 2016年 Year | 2017年 Year | ||
---|---|---|---|---|
截雨量 Intercepted rainfall (mm) | 全年占比 Percentage of annual rainfall (%) | 截雨量 Intercepted rainfall (mm) | 全年占比 Percentage of annual rainfall (%) | |
5-6月截雨棚Shelter on early growing season (SE) | 174.2 | 31.6 | 228.1 | 40.0 |
7-8月截雨棚Shelter on late growing season (SL) | 224.5 | 40.7 | 183.8 | 32.3 |
物候 Phenology | 处理 Treatments | 高山嵩草K. pygmaea | 早熟禾P. pratensis | 钉柱委陵菜P. saundersiana | 菊叶委陵菜P. tanacetifolia | ||||
---|---|---|---|---|---|---|---|---|---|
2016 | 2017 | 2016 | 2017 | 2016 | 2017 | 2016 | 2017 | ||
返青期 Green-up date | CK | 153.0±0.0b | 128.3±1.7a | 156.3±1.7b | 123.3±3.3a | 148.3±4.7b | 115.0±0.0a | 146.3±1.7b | 115.0±0.0a |
SE | 179.0±0.0a | 123.3±1.7b | 183.7±2.9a | 121.7±1.7a | 174.0±3.2a | 115.0±0.0a | 173.7±10.7a | 115.0±0.0a | |
SL | 154.7±1.7b | 125.0±0.0ab | 151.3±1.7b | 121.7±1.7a | 148.3±4.7b | 115.0±0.0a | 151.3±1.7b | 115.0±0.0a | |
枯黄期 Withered date | CK | 215.3±3.7a | 214.3±1.7a | 244.0±0.0a | 223.7±1.7a | 222.3±1.7b | 222.0±0.0a | 222.3±1.7b | 221.7±3.2a |
SE | 220.7±1.7a | 206.0±5.0a | 244.0±0.0a | 216.7±10.3a | 230.7±3.3a | 212.7±3.3b | 230.7±3.3a | 216.0±0.0a | |
SL | 212.0±2.0a | 211.0±0.0a | 234.0±0.0a | 214.3±1.7a | 217.3±1.7b | 216.0±0.0ab | 211.7±3.7b | 216.0±0.0a | |
生长季长度 Growing season duration | CK | 62.3±3.7a | 86.0±2.9a | 87.7±1.7a | 100.3±4.4a | 74.0±5.7a | 107.0±0.0a | 76.0±0.0a | 106.7±3.2a |
SE | 41.7±1.7b | 82.7±6.0a | 60.3±2.9b | 95.0±12.0a | 56.7±5.0b | 97.7±3.3b | 57.0±7.6b | 101.0±0.0a | |
SL | 57.3±3.7a | 86.0±0.0a | 82.7±1.7a | 92.7±3.3a | 69.0±3.0ab | 101.0±0.0ab | 60.3±3.2ab | 101.0±0.0a | |
繁殖期 Reproductive duration | CK | 12.0±1.0a | 56.0±0.0a | 53.7±3.7a | 26.3±2.3a | 56.0±2.9a | 51.0±0.0a | 50.7±3.2a | 49.3±1.7a |
SE | 3.3±3.3a | 52.7±3.3a | 32.3±3.7b | 24.0±0.0a | 22.3±4.5b | 47.0±4.0a | 20.0±2.9c | 53.5±2.5a | |
SL | 5.7±3.2a | 57.7±1.7a | 45.3±3.2a | 29.0±5.0a | 49.3±1.7a | 51.0±0.0a | 37.7±4.5b | 49.3±1.7a |
Table 2 Effects of drought on the plant phenology of alpine meadow
物候 Phenology | 处理 Treatments | 高山嵩草K. pygmaea | 早熟禾P. pratensis | 钉柱委陵菜P. saundersiana | 菊叶委陵菜P. tanacetifolia | ||||
---|---|---|---|---|---|---|---|---|---|
2016 | 2017 | 2016 | 2017 | 2016 | 2017 | 2016 | 2017 | ||
返青期 Green-up date | CK | 153.0±0.0b | 128.3±1.7a | 156.3±1.7b | 123.3±3.3a | 148.3±4.7b | 115.0±0.0a | 146.3±1.7b | 115.0±0.0a |
SE | 179.0±0.0a | 123.3±1.7b | 183.7±2.9a | 121.7±1.7a | 174.0±3.2a | 115.0±0.0a | 173.7±10.7a | 115.0±0.0a | |
SL | 154.7±1.7b | 125.0±0.0ab | 151.3±1.7b | 121.7±1.7a | 148.3±4.7b | 115.0±0.0a | 151.3±1.7b | 115.0±0.0a | |
枯黄期 Withered date | CK | 215.3±3.7a | 214.3±1.7a | 244.0±0.0a | 223.7±1.7a | 222.3±1.7b | 222.0±0.0a | 222.3±1.7b | 221.7±3.2a |
SE | 220.7±1.7a | 206.0±5.0a | 244.0±0.0a | 216.7±10.3a | 230.7±3.3a | 212.7±3.3b | 230.7±3.3a | 216.0±0.0a | |
SL | 212.0±2.0a | 211.0±0.0a | 234.0±0.0a | 214.3±1.7a | 217.3±1.7b | 216.0±0.0ab | 211.7±3.7b | 216.0±0.0a | |
生长季长度 Growing season duration | CK | 62.3±3.7a | 86.0±2.9a | 87.7±1.7a | 100.3±4.4a | 74.0±5.7a | 107.0±0.0a | 76.0±0.0a | 106.7±3.2a |
SE | 41.7±1.7b | 82.7±6.0a | 60.3±2.9b | 95.0±12.0a | 56.7±5.0b | 97.7±3.3b | 57.0±7.6b | 101.0±0.0a | |
SL | 57.3±3.7a | 86.0±0.0a | 82.7±1.7a | 92.7±3.3a | 69.0±3.0ab | 101.0±0.0ab | 60.3±3.2ab | 101.0±0.0a | |
繁殖期 Reproductive duration | CK | 12.0±1.0a | 56.0±0.0a | 53.7±3.7a | 26.3±2.3a | 56.0±2.9a | 51.0±0.0a | 50.7±3.2a | 49.3±1.7a |
SE | 3.3±3.3a | 52.7±3.3a | 32.3±3.7b | 24.0±0.0a | 22.3±4.5b | 47.0±4.0a | 20.0±2.9c | 53.5±2.5a | |
SL | 5.7±3.2a | 57.7±1.7a | 45.3±3.2a | 29.0±5.0a | 49.3±1.7a | 51.0±0.0a | 37.7±4.5b | 49.3±1.7a |
因子 Factors | 返青期 Green-up date | 枯黄期 Withered date | 生长季长度 Growing season duration | 繁殖期 Reproductive duration |
---|---|---|---|---|
Y | 1063.786*** | 55.914*** | 317.972*** | 122.336*** |
T | 45.236*** | 10.662*** | 19.911*** | 37.700*** |
S | 12.053*** | 27.827*** | 20.562*** | 34.392*** |
Y×T | 53.091*** | 12.525*** | 7.038** | 28.625*** |
Y×S | 1.108 | 11.621*** | 5.945** | 132.034*** |
T×S | 0.477 | 0.730 | 0.541 | 2.244 |
Y×T×S | 0.354 | 0.434 | 0.692 | 3.138* |
Table 3 Results of multi-factor analysis of variance on the effects of year, species, drought treatment and their interactions on green up date, first leaf coloring date, length of growing season, and reproductive duration of alpine meadow
因子 Factors | 返青期 Green-up date | 枯黄期 Withered date | 生长季长度 Growing season duration | 繁殖期 Reproductive duration |
---|---|---|---|---|
Y | 1063.786*** | 55.914*** | 317.972*** | 122.336*** |
T | 45.236*** | 10.662*** | 19.911*** | 37.700*** |
S | 12.053*** | 27.827*** | 20.562*** | 34.392*** |
Y×T | 53.091*** | 12.525*** | 7.038** | 28.625*** |
Y×S | 1.108 | 11.621*** | 5.945** | 132.034*** |
T×S | 0.477 | 0.730 | 0.541 | 2.244 |
Y×T×S | 0.354 | 0.434 | 0.692 | 3.138* |
特征 Features | 处理 Treatments | 禾莎类草Grasses and sedges | 杂类草Forbs | ||
---|---|---|---|---|---|
2016 | 2017 | 2016 | 2017 | ||
高度 Height (cm) | CK | 8.5±1.1a | 8.1±0.8a | 1.5±0.1a | 1.3±0.2a |
SE | 4.4±0.6b | 5.1±1.4a | 1.0±0.0b | 1.3±0.2a | |
SL | 7.4±0.8ab | 4.8±1.0a | 1.8±0.2a | 1.5±0.1a | |
盖度Coverage (%) | CK | 38.0±5.6a | 42.6±2.3a | 27.4±1.7a | 19.8±0.3a |
SE | 31.7±5.5a | 40.0±3.3a | 19.7±4.8ab | 15.1±3.4a | |
SL | 35.7±2.4a | 10.0±2.5b | 14.1±1.2b | 15.1±2.2a | |
生物量Biomass (g·m-2) | CK | 45.8±9.8a | 44.1±2.7a | 27.0±2.4a | 20.4±3.0a |
SE | 20.3±5.5b | 26.0±6.8b | 12.7±3.1b | 15.0±3.5a | |
SL | 36.1±3.2ab | 6.3±2.2c | 16.3±1.8b | 17.6±3.4a |
Table 4 Effects of drought on height, coverage and biomass of different functional groups in alpine meadow
特征 Features | 处理 Treatments | 禾莎类草Grasses and sedges | 杂类草Forbs | ||
---|---|---|---|---|---|
2016 | 2017 | 2016 | 2017 | ||
高度 Height (cm) | CK | 8.5±1.1a | 8.1±0.8a | 1.5±0.1a | 1.3±0.2a |
SE | 4.4±0.6b | 5.1±1.4a | 1.0±0.0b | 1.3±0.2a | |
SL | 7.4±0.8ab | 4.8±1.0a | 1.8±0.2a | 1.5±0.1a | |
盖度Coverage (%) | CK | 38.0±5.6a | 42.6±2.3a | 27.4±1.7a | 19.8±0.3a |
SE | 31.7±5.5a | 40.0±3.3a | 19.7±4.8ab | 15.1±3.4a | |
SL | 35.7±2.4a | 10.0±2.5b | 14.1±1.2b | 15.1±2.2a | |
生物量Biomass (g·m-2) | CK | 45.8±9.8a | 44.1±2.7a | 27.0±2.4a | 20.4±3.0a |
SE | 20.3±5.5b | 26.0±6.8b | 12.7±3.1b | 15.0±3.5a | |
SL | 36.1±3.2ab | 6.3±2.2c | 16.3±1.8b | 17.6±3.4a |
因子 Factor | 高度 Plant height | 盖度 Coverage | 生物量 Biomass |
---|---|---|---|
Y | 1.065 | 4.309* | 3.358 |
T | 7.669** | 15.946*** | 15.705*** |
G | 153.032*** | 56.168*** | 19.670*** |
Y×T | 1.866 | 4.908* | 4.064* |
Y×G | 0.734 | 0.018 | 2.133 |
T×G | 6.077** | 2.675 | 3.718* |
Y×T×G | 0.949 | 11.536*** | 5.075* |
Table 5 Results of multi-factor analysis of variance on the effects of years, functional groups, drought treatment and their interactions on plant height, coverage and biomass of alpine meadow
因子 Factor | 高度 Plant height | 盖度 Coverage | 生物量 Biomass |
---|---|---|---|
Y | 1.065 | 4.309* | 3.358 |
T | 7.669** | 15.946*** | 15.705*** |
G | 153.032*** | 56.168*** | 19.670*** |
Y×T | 1.866 | 4.908* | 4.064* |
Y×G | 0.734 | 0.018 | 2.133 |
T×G | 6.077** | 2.675 | 3.718* |
Y×T×G | 0.949 | 11.536*** | 5.075* |
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