Relationship between Water and Carbon Utilization under Different Straw Mulching and Plant Density of Summer Maize in North China Plain

2017 International Symposium on Application of Materials Science and Energy Materials

材料科学;能源学

Liu, Quanru^1 ; Du, Shoujian^1 ; Yin, Honglian^1 ; Wang, Juan^1

Department of Water Conservancy Engineering, Shandong Water Conservancy Vocational College, Rizhao, China^1

关键词: Carbon utilization;    CO2 emissions;    Grain yield;    High water;    North China Plain;    Plant densities;    Straw mulching;    Summer maize;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/322/4/042005/pdf
DOI  :  10.1088/1757-899X/322/4/042005

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

To explore the relationship between water and carbon utilization and key factors to keep high water use efficiency (WUE), a 2-yr experiment was conduct by covering 0 and 0.6 kg m-2straw to the surface of soil with plant densities of 1.0 × 105, 7.5 × 104, and 5.5 × 104plants ha-1in North China Plain during summer maize growing seasons of the 2012 and 2013. Results showed that straw mulching not only increased grain yield (GY), WUE, and carbon efficient ratio (CER) but also inhibited CO2emission significantly. WUE positively correlated with CER, GY and negative correlated with evapotranspiration (ET) and CO2emission. CER had the larger direct effect on WUE compared with ET and CO2emission. The results indicate that straw mulching management in summer maize growing seasons could make sense for inhibiting CO2emission.