Carbon and nutrient fluxes and balances in Nuba Mountains homegardens, Sudan
Carbon and nutrient fluxes and balances in Nuba Mountains homegardens, Sudan
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苏丹努巴山家庭花园的碳和养分通量及平衡
DOI：
10.1007/s10705-014-9624-y
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发表时间：
2014
影响因子：
3.1
通讯作者：
Andreas Buerkert
中科院分区：
文献类型：
--
作者：
Sven Goenster;Martin Wiehle;Jens Gebauer;Abdalla Mohamed Ali;Andreas Buerkert
管理集约化引起了人们对苏丹努巴山庭园可持续性的关注。本研究旨在根据碳(C)和养分平衡的方法评估这些农业生态系统的可持续性。选择3个传统（低投入）和3个集约化（高投入）家庭菜园，监测C、氮(N)、磷(P)和钾(K)的相关输入输出通量。通量包括与管理活动（土壤改良、灌溉和生物量去除）有关的通量，以及生物固氮、光合作用固碳、湿沉降和干沉降、气体排放和淋滤的估计。在高投入家庭花园中，碳和养分的年平衡为- 21千克碳公顷−1，- 70千克氮公顷−1,9千克磷公顷−1和- 117千克钾公顷−1，在低投入家庭花园中为- 1722千克碳公顷−1，- 167千克氮公顷−1，- 9千克磷公顷−1和- 74千克钾公顷−1。光合C是主要的C输入通量，在高、低输入系统中平均分别为7047和5610 kg C ha - 1a - 1。生物固氮（17 kg N ha−1a−1）仅适用于低投入系统。在这两个系统中，每年通过尘埃输入的77 kg kha - 1非常显著，每年约5900 kg cha - 1的气态碳损失是主要的碳损失。在这两种花园类型中，生物量的去除占总养分输出的一半以上，其中三分之一来自除草和植物残留物的去除，三分之二来自收获。所观察到的负营养平衡可能导致作物产量的长期下降。除其他措施外，在清洁家庭花园期间，生物质去除中C和营养物质的再利用可能会部分关闭C和营养循环。
Management intensification has raised concerns about the sustainability of homegardens in the Nuba Mountains, Sudan. This study aimed at assessing the sustainability of these agroecosystems following the approach of carbon (C) and nutrient balances. Three traditional (low input) and three intensified (high input) homegardens were selected for monitoring of relevant input and output fluxes of C, nitrogen (N), phosphorus (P) and potassium (K). The fluxes comprised those related to management activities (soil amendments, irrigation, and biomass removal) as well as estimates of biological N2fixation, C fixation by photosynthesis, wet and dry deposition, gaseous emission, and leaching. Annual balances for C and nutrients amounted to −21 kg C ha−1, −70 kg N ha−1, 9 kg P ha−1and −117 kg K ha−1in high input homegardens and to −1,722 kg C ha−1, −167 kg N ha−1, −9 kg P ha−1and −74 kg K ha−1in low input homegardens. Photosynthesis C was the main C input flux with averaged of 7,047 and 5,610 kg C ha−1a−1in high and low input systems, respectively. Biological N2fixation (17 kg N ha−1a−1) was relevant only in low input systems. In both systems, the annual input of 77 kg K ha−1through dust was highly significant and annual gaseous C losses of about 5,900 kg C ha−1were the main C loss. In both garden types, the removal of biomass accounted for more than half of total nutrient exports of which one-third resulted from weeding and removal of plant residues and two-third from harvest. The observed negative nutrient balances may lead to a long-term decline of crop yields. Among other measures the reuse of C and nutrients in biomass removals during the cleaning of homegardens may allow to partially close C and nutrient cycles.
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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
监测非洲农业系统的养分流动和经济表现（NUTMON）；
DOI：
10.1016/s0167-8809(98)00132-7
发表时间：
1998
期刊：
Agriculture, Ecosystems & Environment
影响因子：
--
作者：
H. Van den Bosch;J. N. Gitari;V.N Ogaro;S. Maobe;J. Vlaming
通讯作者：
J. Vlaming
尼日尔酸性沙土中珍珠粟（Pennisetum glaucum L.）的长期氮平衡
影响因子：
2.5
作者：
H. Hafner;J. Bley;A. Bationo;P. Martin;H. Marschner
通讯作者：
H. Marschner
离子交换树脂的吸附和解吸特性，用于估算现场浸出损失
影响因子：
1.8
作者：
Siegfried;Vazhacharickal;Predotova;Buerkert
通讯作者：
Buerkert
印度尼西亚村庄家庭花园的商业化：构成和功能的变化
DOI：
--
发表时间：
2006
期刊：
Agroforesry Systems 68
影响因子：
--
作者：
Sonaji;R.;Iwanaga;S.;K.Miyanaga;K.Shiga;E.K.Damayanti;M.Masuda;Masaaki Yamada;山田 祐彰;山田 祐彰;山田 祐彰;Abdoellah OS et al.
通讯作者：
Abdoellah OS et al.