《Table 2 Monthly Budyko's aridity index in 2015 and average value between 2012 and 2014》
本系列图表出处文件名:随高清版一同展现
《Sap flow characteristics and physiological adjustments of two dominant tree species in pure and mixed plantations in the semi-arid Loess Plateau of China》
Note:Budyko's aridity index is the ratio of the rainfall amount(P)to potential evapotranspiration(ETP).An index smaller than 1.00means the ecosystem has suffered drought stress.Mean±SD.
The daily SFn for P.tabuliformis and H.rhamnoides in pure plantations generally exhibited a decreasing trend during the observation period;meanwhile,the daily SFn for both these two species in mixed plantation exhibited a\""U\""type,with the higher value occurring in June and September(Fig.2).The variation of daily SFn for P.tabuliformis in the plantation was significantly different(t=4.95,P<0.01,df=226)from that for the same species in mixed plantation.However,there was no significant difference(t=1.95,P=0.053,df=226)in daily variation of SFn for H.rhamnoides in pure and mixed plantations.Generally,the relative response of SFn for these two species significantly increased(P<0.05,df=2)among three rainfall classes in both pure and mixed plantations(Fig.3),when 10–15 mm class was not considered.However,no significant difference was observed either between rainfall classes of 5–10 and>15 mm for P.tabuliformis in pure plantation(P=0.09,df=7),or between rainfall classes of 0–5 and 5–10 mm for H.rhamnoides in pure plantation(P=0.14,df=7).Moreover,the CVs of SFn for P.tabuliformis and H.rhamnoides in pure plantation were 39.1%and 37.59%,and were 43.64%and 36.58%for corresponding species in mixed plantation,respectively(Table 4).
图表编号 | XD0020363800 严禁用于非法目的 |
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绘制时间 | 2018.12.01 |
作者 | TANG Yakun、WU Xu、CHEN Yunming |
绘制单位 | State Key Laboratory of Soil Erosion and Dry-land Farming on the Loess Plateau, Northwest A&F University、State Key Laboratory of Soil Erosion and Dry-land Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences |
更多格式 | 高清、无水印(增值服务) |
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