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通过建立小兴安岭阔叶红松(Pinus koraiensis)林内林隙与非林隙红松、臭冷杉(Abies nephrolepis)轮宽年表,分析林隙干扰(微环境差异)和1980年后显著升温对树木径向生长的影响。结果表明:升温减缓了非林隙红松生长,却加快了林隙红松生长;升温后,非林隙红松受温度影响减弱,而林隙红松则增强,林隙和非林隙红松径向生长与帕默尔干旱指数(Palmer drought severity index,PDSI)均由负相关变为正相关;林隙干扰导致臭冷杉径向生长减缓,升温导致林隙与非林隙臭冷杉年生长量均下降了约50%,非林隙木对温度的负响应要高于林隙木;升温后,5—10月温度对非林隙木抑制作用明显,非生长季(1—5月)降水对非林隙臭冷杉的抑制作用加强,而对林隙臭冷杉则由抑制变为促进;PDSI与非林隙臭冷杉由升温前的负相关变为升温后的正相关,而林隙臭冷杉则负相关更显著;林隙干扰减少耐荫喜湿树木径向生长,而对阳性树种影响不大或略有增加;林隙木比非林隙木更易受外界环境变化的影响,林隙干扰可使喜湿耐荫树种提前适应暖干环境,以提高了对升温适应性;升温导致林隙木与非林隙木年轮气候响应差异变大。
The radial chronology of Pinus koraiensis forests and Abies nephrolepis was established to analyze the effects of gap disturbance (slight environmental differences) and the significant warming after 1980 on the radial growth of trees Impact. The results showed that: warming slowed the growth of Pinus koraiensis, but accelerated the growth of Pinus koraiensis; after the temperature was raised, the temperature of Pinus koraiensis decreased, while the Pinus koraiensis increased, and the gap and non- Both the radial growth of pine and the Palmer drought index (PDSI) were positively correlated with negative correlations. The girdling disturbance led to the slow radial growth of Fir fir, which led to the annual growth of Gap and Non-Fagaceous Fir The amount of non-woody wood decreased to about 50%, the negative response of non-woody wood to temperature was higher than that of woody wood. After the temperature was raised, the temperature had a significant inhibitory effect on non-woody wood from May to October, Precipitation on the non-shelled firs fir strengthen the inhibition, and the gap-shelled firs fir from inhibition to promote; PDSI and non-shelled Fir fir from the negative correlation before warming into a positive correlation after warming, and the gap smell Fir was negative correlation is more significant; Gap interference reduce the shade-tolerant trees radial growth, but little or slightly increase the positive species; Gap wood is more susceptible to changes in the external environment than non-Gap wood gap Interference can make hi-shade shade-tolerant species adapt to the warm-dry environment in advance to improve the adaptability to temperature increase; Gaps wood and non-wood forest gap dendroclimatic response difference becomes larger.