Gaseous emissions and soil fertility of homegardens in the Nuba Mountains, Sudan
Gaseous emissions and soil fertility of homegardens in the Nuba Mountains, Sudan
复制标题
苏丹努巴山区家庭花园的气体排放和土壤肥力
DOI：
10.1002/jpln.201400292
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发表时间：
2015
影响因子：
2.5
通讯作者：
Andreas Buerkert
中科院分区：
文献类型：
--
作者：
Sven Goenster;Martin Wiehle;Martina PredotovaJens Gebauer;Abdalla Mohamed Ali;Andreas Buerkert
努巴山庭园的集约化可能导致这些小规模土地利用系统的碳和养分损失增加，并可能威胁到其可持续性。因此，本研究旨在确定不同土壤湿度、温度和C、N状态的家庭花园土壤的气态C和N通量。在2010年雨季，每两周记录两个传统、两个强化家庭菜园和一个未开垦对照土壤的CO2、NH3和N2O排放。通量率的测定采用便携式动态封闭腔室系统，该系统由连接到PTFE涂层腔室的光声多气场监测器组成。表层土壤湿度和温度与气体测量同时记录。在6月至12月的观察期，所有家庭花园的平均排放量为4,527 kg CO2 - C ha - 1, 22 kg NH3 - N ha - 1和11 kg N2O - N ha - 1。通量率主要与土壤湿度呈正相关，与土壤温度负相关。增加管理强度与CO2 - C排放量之间存在显著的正相关，但相关性较弱（rs< 0.34）。同样，nh3的早晨排放量与管理强度的增加呈弱相关（rs= 0.17）。所研究的家庭花园中相对较高的气态C和N损失要求采取有效的管理措施，以确保这些传统土地利用系统的土壤有机C状态。
Intensification of homegardens in the Nuba Mountains may lead to increases in C and nutrient losses from these small‐scale land‐use systems and potentially threaten their sustainability. This study, therefore, aimed at determining gaseous C and N fluxes from homegarden soils of different soil moisture, temperature, and C and N status. Emissions of CO2, NH3, and N2O from soils of two traditional and two intensified homegardens and an uncultivated control were recorded bi‐weekly during the rainy season in 2010. Flux rates were determined with a portable dynamic closed chamber system consisting of a photo‐acoustic multi‐gas field monitor connected to a PTFE coated chamber. Topsoil moisture and temperature were recorded simultaneously to the gas measurements. Across all homegardens emissions averaged 4,527 kg CO2‐C ha−1, 22 kg NH3‐N ha−1, and 11 kg N2O‐N ha−1for the observation period from June to December. Flux rates were largely positively correlated with soil moisture and predominantly negatively with soil temperature. Significant positive, but weak (rs< 0.34) correlations between increasing management intensity and emissions were noted for CO2‐C. Similarly, morning emissions of NH3and increasing management intensity were weakly correlated (rs= 0.17). The relatively high gaseous C and N losses in the studied homegardens call for effective management practices to secure the soil organic C status of these traditional land‐use systems.
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影响因子：
2.5
作者：
Konrad Siegfried;H. Dietz;E. Schlecht;A. Buerkert
通讯作者：
Konrad Siegfried;H. Dietz;E. Schlecht;A. Buerkert
影响因子：
4.9
作者：
Bowatte, Saman;Newton, Paul C. D.;Luo, Dongwen
通讯作者：
Luo, Dongwen
昆士兰州东南部罗德草牧场肥料氮损失的途径
DOI：
--
发表时间：
1975
期刊：
影响因子：
--
作者：
Vr Catchpole
通讯作者：
Vr Catchpole
改进密闭室测量土壤N2O通量的统计准备工作。
DOI：
10.1016/j.scitotenv.2013.02.032
发表时间：
2013
期刊：
The Science of the total environment
影响因子：
--
作者：
S. Morris;S. Kimber;P. Grace;L. Van Zwieten
通讯作者：
L. Van Zwieten
苏丹科尔多凡地区的森林生物多样性：气候变化、害虫、疾病和人类活动的影响
影响因子：
--
作者：
B. A. El Tahir;Kamal Eldin Mohammed Fadl;Abdel Galil Doka Fadlalmula
通讯作者：
Abdel Galil Doka Fadlalmula