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EFFECTS OF PLANTING SYSTEMS AND STRAW MULCHING ON CARBON EMISSIONS AND WINTER WHEAT GRAIN YIELD IN THE NORTH CHINA PLAIN

Published online by Cambridge University Press:  27 June 2017

YUJIE REN
Affiliation:
College of Water Conservancy and Civil Engineering, Shandong Agricultural University, Tai'an 271018, China
CHAO GAO
Affiliation:
College of Water Conservancy and Civil Engineering, Shandong Agricultural University, Tai'an 271018, China
ZHENXING YAN
Affiliation:
College of Water Conservancy and Civil Engineering, Shandong Agricultural University, Tai'an 271018, China
RUI ZONG
Affiliation:
College of Water Conservancy and Civil Engineering, Shandong Agricultural University, Tai'an 271018, China
YUZHAO MA
Affiliation:
College of Water Conservancy and Civil Engineering, Shandong Agricultural University, Tai'an 271018, China
QUANQI LI*
Affiliation:
College of Water Conservancy and Civil Engineering, Shandong Agricultural University, Tai'an 271018, China
*
Corresponding author. Email: quanqili@sdau.edu.cn

Summary

To explore effective ways to decrease soil CO2 emission and increase winter wheat grain yield in the North China Plain, a field experiment was conducted using two planting systems (wide-precision planting and conventional-cultivation planting) and two straw mulching rates (0 and 0.6 kg m−2) to study carbon emission, carbon cumulative emission flux, grain yield and yield carbon utilization efficiency. In the 2013–2014 and 2014–2015 winter wheat growing seasons, CO2 emission rate and cumulative CO2-C fluxes following straw mulching treatment were significantly lower than those following non-mulching treatments, whereas the yield carbon utilization efficiency was significant higher following straw mulching treatment. Straw mulching significantly reduced winter wheat grain yield, which was mainly due to the significant decrease in spike numbers and 1000-kernel weight. However, wide-precision planting system significantly increased winter wheat grain yields by increasing spike numbers under straw mulching conditions. Therefore, wide-precision planting system could compensate for the reduction in winter wheat grain yield under carbon sequestration conditions in the North China Plain.

Type
Research Article
Copyright
Copyright © Cambridge University Press 2017 

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