|Table of Contents|

The Response of Yield Formation to Elevated Atmospheric CO2 in Different Soybean Cultivars(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2015年05期
Page:
819-825
Research Field:
Publishing date:

Info

Title:
The Response of Yield Formation to Elevated Atmospheric CO2 in Different Soybean Cultivars
Author(s):
YANG Song-chao1; 2;  LI Yan-sheng2;  LIU Chang-kai2;  LIU Xiao-bing2;  WANG Guang-hua2;  MAO Jian-wei3; YIN Kui-de1;  JINJian2
1.College of Life and Sci-technology, Heilongjiang BaYi Agricultural University, Daqing 163319, China; 2.Key Laboratory of Mollisols Agroecology, Northeast Insitute of Geography and Agroecology, Chinese Academy of Sciences, Harbin 150081, China; 3.Jilin Provincial Agro-tech Extension Center, Changchun 130033, China
Keywords:
Climate change;  Elevated CO2;  Soybean yield;  Yield components
PACS:
-
DOI:
10.11861/j.issn.1000-9841.2015.05.0819
Abstract:
The soybean yield formation in response to the elevated CO2(eCO2) was analyzed in open top chamber (OTC) simulation systems using 8 soybean cultivars which were released in 1950-2006. Results showed that above ground biomass increased by 46.1% and yield increased by 37.8% across 8 soybean cultivars when the concentrations of atmospheric CO2increased up to 550 μmol?mol-1. The yield response to eCO2varied in the 8 soybean cultivars.The minimum increase was only 0.6% in Hejiao 4 hao, while the maximum was 95.3% in Xiaohuangjin.The effect of eCO2on harvest index was not significant except for Suinong 9 hao. Yield components of soybean were also increased under eCO2.Average plant height of 8 soybean cultivars was increased by 15 cm, while the soybean node number did not change significantly (P＞0.05).The pod number and seed number increased by 42.9% and 37.0% under eCO2on average, respectively.This study also found that the contribution of yield components to soybean yield increase under eCO2differed. Under eCO2, the increase of the 3-seed pod number, total pod number and seed number were significant correlated (P＜0.05). Due to the significant contribution of seed number to yield, the increase of yield under eCO2could be estimated by a model of y=0.175x+0.102 (P＜0.05；R2=0.792), which was obtained through stepwise regression analysis.

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Last Update: 2015-11-07