Effects of Urea and Straw Application on CO2 and N2O Emissions in Tea Field Soil in Central China

doi:10.11924/j.issn.1000-6850.casb15080009

Abstract

Abstract: In order to study the effect of urea and straw application on CO₂ and N₂O emission in tea field soil and provide theory basis for the rational fertilization, hilly area tea field of red soil in central China was took as study object, the emission characteristics were studied after the application of CO₂ and N₂O by the method of static culture system under indoor incubation condition. Four different treatments (control, urea, crop straw and urea crop straw) were designed. The results showed that soil CO₂ and N₂O emission presented significant differences among four different treatments. The application of crop straw could remarkably promote soil CO₂ emission, soil CO₂emissions were 5.57 and 4.99 times higher than CK after the application of crop straw and urea crop straw respectively. The application of urea could significantly promote N₂O emission in the tea field soil, but the application of crop straw reduced soil N₂O emission. There was a significantly positive correlation between the N₂O emissions amount of CK and urea treatments and the NH₄-N content. The soil NO₃^--N content had a close relationship with N₂O emission of the treatment without crop straw application, while the NO₃^--N content and N₂O emission of the treatment with crop straw had no significant correlation. Soil soluble organic carbon (DOC) had significant impact on CO₂ emission, the two had a significantly linear positive correlativity.

CLC Number:

Yin Xin,Tian Yanan,Xie Qi and Lin Shan. Effects of Urea and Straw Application on CO₂ and N₂O Emissions in Tea Field Soil in Central China[J]. Chinese Agricultural Science Bulletin, 2015, 31(36): 211-219.

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Effects of Urea and Straw Application on CO₂ and N₂O Emissions in Tea Field Soil in Central China

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