1. 草地农业系统国家重点实验室,甘肃,兰州,730020
2. 兰州大学 草地农业科技学院,甘肃,兰州,730020
纸质出版:2015
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杜珊珊, 杨倩, 张清平, 等. 保护性耕作对黄土旱塬箭筈豌豆地土壤呼吸的影响[J]. 水土保持通报, 2015,35(6):144-148.
DU Shanshan, YANG Qian, ZHANG Qingping, et al. Effects of Conservation Tillage on Soil Respiration in Vetch Field in Rain-fed Loessial Tablelands[J]. Bulletin of Soiland Water Conservation, 2015, 35(6): 144-148.
杜珊珊, 杨倩, 张清平, 等. 保护性耕作对黄土旱塬箭筈豌豆地土壤呼吸的影响[J]. 水土保持通报, 2015,35(6):144-148. DOI: 10.13961/j.cnki.stbctb.2015.06.025.
DU Shanshan, YANG Qian, ZHANG Qingping, et al. Effects of Conservation Tillage on Soil Respiration in Vetch Field in Rain-fed Loessial Tablelands[J]. Bulletin of Soiland Water Conservation, 2015, 35(6): 144-148. DOI: 10.13961/j.cnki.stbctb.2015.06.025.
[目的
]
揭示保护性耕作对土壤呼吸的影响
为旱区保护性农业的发展提供理论依据。[方法
]
采用多通道土壤碳通量系统监测传统耕作(T)、传统耕作+秸秆覆盖(TS)、免耕(NT)和免耕+秸秆覆盖(NTS)下箭筈豌豆(Vicia sativa)地的土壤呼吸速率。[结果
]
各措施下花期呼吸速率比收获期高10.45%~45.09%
NTS处理下土壤呼吸速率最低别比TS
NT和T处理显著减少39.17%
21.37%和30.25%(p
<
0.01)。耕作处理(T
TS)下日均土壤呼吸速率高于免耕处理(NT
NTS)(p>0.05)。晴天土壤呼吸变化呈单峰曲线
最大值出现在14:00。耕作下土壤呼吸速率与气温显著线性相关
免耕下(NT
NTS)与气温呈指数关系(p
<
0.01)。不同耕作措施间气温敏感性Q
10
值大小依次为:T(1.97) >NT(1.62) >TS(1.58) >NTS(1.52)。[结论
]
免耕加秸秆还田处理对减少温室气体排放有一定的贡献。
[Objective] The effects of conservation tillage on soil respiration were researched to provide a theoretical basis for the development of conservation agriculture in arid area.[Methods] Soil respiration rate was carried out using multi-channel soil carbon flux measurement system instrument. Tillage treatments were:conventional tillage(T)
conventional tillage with stubble retention(TS)
no tillage(NT) and no tillage with stubble retention(NTS).[Results] Respiration rate in flowering period was 10.45%~45.09% higher than that in harvest period for all tillage measures. In comparison with TS
NT and T treatment
NTS treatment significantly reduced soil C emission with the percentages of 39.17%
21.37% and 30.25%
respectively(p<0.01). Soil respiration at sunny day presented an stubble unimodal curve with the peak value at 14:00. The averaged daily soil respiration rates under the two tillage treatments were high but not insignificant than that under the two no-tillage treatments. Under tillage treatments(T
TS)
a significant linear correlation was found between soil respiration rate and air temperature; under the no-tillage treatment(NT
NTS)
they had a significant exponential relationship(p<0.01). Q10 values
namely the atmospheric temperature sensitivity under the four tillage treatments had a rank of T(1.97) >NT(1.62) >TS(1.58) >NTS(1.52).[Conclusion] Conservation tillage as the no tillage with stubble retention(NTS) has its contribution to the reduction of greenhouse gas emissions.
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