大豆科学2026，Vol.45Issue(3)：89-99,11.DOI:10.11861/j.issn.1000-9841.2026.03.0089
不同强光处理时长对大豆气孔性状及光合响应强光的影响
Influence of Different Durations of High Light Treatment on Soybean Stomatal Traits and Photosynthetic Response to High Light
摘要
Abstract
To clarify the responses of stomatal and photosynthetic traits of soybeans with different shade tolerance to the duration of midday strong light,Guixia 7(low shade tolerance)and Nandou 12(high shade tolerance)were selected as experimental materials.The photosynthetic photon flux density(PPFD)was set at1 200 μmol·m-2·s-1 for midday strong light,with durations of 30(L1),150(L2),and200 min(L3),respectively.The PPFD was 150 μmol·m-2·s-1 for the remaining periods.A stable light intensity of 400 μmol·m-2·s-1 throughout the day was used as the control(CK).The influence of different light treatments on the photosynthetic characteristics,stomatal traits,stomatal induction rate,and photosynthetic induction rate of soybean were analyzed.The results showed that increasing the duration of midday strong light was beneficial to enhancing the photosynthetic capacity of soybean leaves.The maximum net photosynthetic rate of Guixia 7 and Nandou 12 in treatment L3 was significantly higher than that in L1 by 88.58%and 9.61%,respectively.Moderately increasing the duration of midday strong light was conducive to increasing the initial stomatal conductance and stomatal induction rate of soybean leaves.Both the initial stomatal conductance and stomatal induction rate were significantly positively correlated with the photosynthetic induction rate.Therefore,moderately increasing the duration of midday strong light was beneficial to increasing the photosynthetic induction rate of soybean leaves.Meanwhile,compared with the stable light treatment,the photosynthetic induction rate of soybeans was faster under the variable light intensity treatment.The photosynthetic induction rates of L1,L2,and L3 treatments in Nandou 12 were significantly higher than those of CK by 36.34%,45.45%,and 9.05%,respectively.This indicates that appropriately increasing the duration of midday light is more conducive to enhancing the photosynthetic capacity,initial stomatal conductance,and stomatal induction rate of soybeans,thereby increasing the photosynthetic induction rate and promoting CO2 fixation.The research results can provide theoretical support for improving the photosynthetic induction rate of soybeans in the strip intercropping system.关键词
大豆/光合特性/强光/叶片气孔性状/光合诱导速率Key words
soybean/photosynthetic characteristics/strong light/leaf stomatal traits/photosynthetic induction rate引用本文复制引用
梁霞,韩肖肖,文涛,刘卫国..不同强光处理时长对大豆气孔性状及光合响应强光的影响[J].大豆科学,2026,45(3):89-99,11.基金项目
农业农村部科技发展中心农业生物育种重大项目(2023ZD0403405). （2023ZD0403405）
