|Table of Contents|

Effects of Straw Returning on Photosynthetic Fluorescence Characteristics and Yield of Soybean Under Elevated Ozone Concentration(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2019年05期
Page:
754-761
Research Field:
Publishing date:

Info

Title:
Effects of Straw Returning on Photosynthetic Fluorescence Characteristics and Yield of Soybean Under Elevated Ozone Concentration
Author(s):
(School of Agriculture, Shenyang Agricultural University, Shenyang 110161, China)
Keywords:
Ozone Soybean Straw returning Photosynthetic characteristics Chlorophyll fluorescence Yield
PACS:
-
DOI:
10.11861/j.issn.1000-9841.2019.05.0754
Abstract:
In order to investigate the effects of straw returning on photosynthetic fluorescence characteristics and yield of soybean under elevated ozone concentration, Tiefeng 29 was used as test material to study the changes of photosynthetic fluorescence parameters and yield of soybean under the conditions of straw returning and ozone concentration. The results showed that with the increase of O3 concentration, the net photosynthetic rate (Pn), transpiration rate (Tr), stomatal conductance (Gs) and water use efficiency (WUE) of soybean decreased, and the intercellular CO2 concentration (Ci) decreased firstly and then increased. The trend of Pn was significantly decreased by 48.59% (P<0.05) compared with S1 in T1 treatment. The Tr and Gs increased significantly by 51.26% and 50.41% compared with S0 in the T2 treatment (P<0.05);The initial photochemical efficiency (Fv/Fm) of PS II, the potential activity of PSⅡ (Fv/Fo) and the actual photochemical efficiency of PSⅡ (ФPSⅡ) increased firstly and then decreased, photosynthetic electron transport rate (ETR), photochemical quenching coefficient (qP) decreased rather than elevated photochemical quenching factor (NPQ). Compared with S0, F1/F0 significantly decreased by 30.13% (P<0.05). There was a significantly positive correlation between yield and ETR and Pn (P<0.05). The experiment showed that high concentration of O3 reduced soybean yield by inhibiting the photosynthesis of soybean plants and decreased the electron transfer rate. Straw returning to the field did alleviate to a certain extent but could not fundamentally eliminate the negative effects of ozone stress.

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Last Update: 2019-09-20