The Response of Spring Phenological Period of Salix matsudana and Ulmus pumila to Climate Warming in Western Liaoning

doi:10.11923/j.issn.2095-4050.cjas2022-0107

Abstract

Abstract:

The phenological changes of plants are sensitive indicators of meteorological and hydrological changes, and the climate change is an important parameter that affects the structure and function of ecosystems. Studying the response of plant phenological changes to climate warming can provide reference for ecological environmental protection, large-scale agricultural structure adjustment and tourism development. Based on the spring phenological data of Salix matsudana and Ulmus pumila, as well as the local temperature data in western Liaoning Province from 1980 to 2020, the phenological characteristics of Salix matsudana and Ulmus pumila in spring and their responses to temperature changes were studied by the methods of linear trend and linear regression. The results showed that from 1980 to 2020, the annual average temperature in the study area showed a significantly upward trend, with a trend rate of 0.365°C/10a, and the average temperature increasing trend of January-March was 0.609°C/10a. The phenological period of Salix matsudana and Ulmus pumila in spring was significantly advanced. The initial leaf-expanding period and the peak flowering period of Salix matsudana were earlier by -2.642d/10a and -2.966d/10a respectively in tendency rate; while the peak flowering period and the initial leaf-expanding period of Ulmus pumila were earlier by-4.008d/10a and -5.242d/10a respectively in tendency rate. The temperature in March and February-March was significantly correlated with the leaf-expansion period and the peak flowering period of Salix matsudana and Ulmus pumila in spring, and was the main factor affecting the phenological period. When the average temperature changed by 1°C, the leaf-expanding period and peak flowering period of Salix matsudana were 0.8-1.5 days earlier, and the leaf-expanding period and peak flowering period of Ulmus pumila were 0.7-1.4 days earlier. The research results can provide reference for farming season forecast and agricultural management.

Key words: Salix matsudana, Ulmus pumila, phenological period, climate warming, western Liaoning

CLC Number:

S567.1，Q948.1

WANG Yi, ZHAN Shenye, LI Lin, CHEN Simeng, ZOU Yan, GUO Zongkai. The Response of Spring Phenological Period of Salix matsudana and Ulmus pumila to Climate Warming in Western Liaoning[J]. Journal of Agriculture, 2022, 12(12): 63-68.

Figures/Tables 6

References 28

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时间尺度	旱柳		榆树
时间尺度	展叶期	盛花期	展叶始期	盛花期
1月	-0.020	-0.001	-0.081	-0.132
2月	-0.219	-0.211	-0.164	-0.279
3月	-0.464^**	-0.437^**	-0.451^**	-0.468^**
1—2月	-0.227	-0.119	-0.139	-0.234
1—3月	-0.277^*	-0.254^*	-0.275^*	-0.357^**
2—3月	-0.381^*	-0.362^**	-0.339^**	-0.421^**

时间尺度	旱柳		榆树
时间尺度	展叶期	盛花期	展叶始期	盛花期
1月	-0.020	-0.001	-0.081	-0.132
2月	-0.219	-0.211	-0.164	-0.279
3月	-0.464^**	-0.437^**	-0.451^**	-0.468^**
1—2月	-0.227	-0.119	-0.139	-0.234
1—3月	-0.277^*	-0.254^*	-0.275^*	-0.357^**
2—3月	-0.381^*	-0.362^**	-0.339^**	-0.421^**

木本植物	时间尺度	展叶期			开花盛期
木本植物	时间尺度	回归方程	r	物候期响应/(d/℃)	回归方程	r	物候期响应/(d/℃)
旱柳	3月	Y=-1.532t+3.9587	-0.464^**	-1.5	Y=-1.481t+5.7611	-0.473^**	-1.5
旱柳	2—3月	Y=-0.823t+8.1063	-0.381^**	-0.8	Y=-1.209t-0.0491	-0.362^**	-1.2
榆树	3月	Y=-1.005t+5.5811	-0.451^**	-1.0	Y=-1.397t+4.1	-0.468^**	-1.4
榆树	2—3月	Y=-0.727t+1.0459	-0.339^**	-0.7	Y=-1.21t+0.1645	-0.421^**	-1.2

木本植物	时间尺度	展叶期			开花盛期
木本植物	时间尺度	回归方程	r	物候期响应/(d/℃)	回归方程	r	物候期响应/(d/℃)
旱柳	3月	Y=-1.532t+3.9587	-0.464^**	-1.5	Y=-1.481t+5.7611	-0.473^**	-1.5
旱柳	2—3月	Y=-0.823t+8.1063	-0.381^**	-0.8	Y=-1.209t-0.0491	-0.362^**	-1.2
榆树	3月	Y=-1.005t+5.5811	-0.451^**	-1.0	Y=-1.397t+4.1	-0.468^**	-1.4
榆树	2—3月	Y=-0.727t+1.0459	-0.339^**	-0.7	Y=-1.21t+0.1645	-0.421^**	-1.2