西南林业大学学报2025，Vol.45Issue(11)：9-15,7.DOI:10.11929/j.swfu.202409031
林窗大小对马尾松林下木荷幼苗生长和光合特性的影响
Dynamic Effects of Forest Window Size on the Growth and Photosynthetic Characteristics of Schima superba Seedlings in the Understory of Pinus massoniana
摘要
Abstract
In order to analyze the response mechanism of forest window size on the growth and photosynthet-ic physiology of Schima superba planted in the understory of Pinus massoniana,the following experimental ma-terials were used.We took 2-year-old SS.superba seedlings as experimental materials,set up different forest win-dow treatments without opening forest windows(CK)and with forest window areas of 50 m2(T1),100 m2(T2),200 m2(T3),and 400 m2(T4),and analyzed the effects of different forest window areas on growth and photosynthetic indexes of S.superba.The results showed that the increase of forest window area increased the relative air tem-perature and decreased the relative humidity inside the forest window;the different area of forest window in dif-ferent seasons had a significant effect on the height,diameter and biomass of SS.superba seedlings,which showed winter＜autumn＜summer in seasons,and the highest value of the growth in summer(July)was in the T4 treatment(47.42 cm),and the lowest value was in the CK treatment(16.52 cm),and the highest value was in the CK treat-ment(16.52 cm),and the lowest value was in the CK treatment(16.52 cm).Different forest window treatments were CK＜T1＜T2＜T3＜T4,and T4 was significantly different from T1 and CK;the net photosynthetic rate(Pn)and stomatal conductance(Gs)of S.superba leaves reached the highest value at T4 treatment in summer,which were 9.95 μmol/(m2·s)and 0.09 μmol/(m2·s),and carbon dioxide CO2(Ci)and transpiration rate(Tr)varied in a V-shape with the increase of the forest window area;whereas,all the treatments of forest window size did not have signi-ficant effects on the maximal fluorescence efficiency of the PSII reaction centers(Fv/Fm)and the potential fluores-cence activity(Fv/F0);there exist correlations among the forest microenvironment,photosynthetic traits,and growth indicators of SS.superba.Temperature and humidity display a noteworthy negative correlation.Tree height,ground diameter,and Pn demonstrate a significant positive correlation.Ground diameter exhibits a significant pos-itive correlation with Tr and Gs.Pn and Gs,Tr and tree height,as well as tree height and ground diameter,all exhib-it an extremely significant positive correlation.From the perspective of growth and photosynthesis,the forest win-dow area of 400 square meters was more conducive to the growth of S.superba and met the growth conditions of S.superba with strong light-loving growth.关键词
马尾松/木荷/林窗/生长/光合特性Key words
Pinus massoniana/Schima superba/forest window/growth/photosynthetic characteristic分类
农业科技引用本文复制引用
Liu Jiangchun,Qiu Jingwen,Wang Rui,Su Sunqing,Cao Guangqiu..林窗大小对马尾松林下木荷幼苗生长和光合特性的影响[J].西南林业大学学报,2025,45(11):9-15,7.基金项目
三明市林业科技项目(明林综[2020]42号)资助. （明林综[2020]42号）
