Do farming practices influence population dynamics of rodents? A case study of the multimammate field rats, Mastomys natalensis, in Tanzania
Do farming practices influence population dynamics of rodents? A case study of the multimammate field rats, Mastomys natalensis, in Tanzania
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耕作方式会影响啮齿动物的种群动态吗？
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
L. Mulungu
中科院分区：
文献类型：
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作者：
A. Massawe;Winnie Rwamugira;H. Leirs;R. Makundi;L. Mulungu
在坦桑尼亚Morogoro的农田中进行了捕获-标记-再捕获研究，以调查多哺乳动物田间大鼠Mastomys natalensis的种群动态如何受到常用的整地方法和耕作制度的影响。采用2 · 2因子完全随机设计试验，研究了两种整地方式（机耕和刀耕火种）和两种种植制度（玉米单作和玉米豆间作），每个处理重复2次，每次重复0.5ha。Mastomys natalensis包括97.8%的丰富的三种啮齿动物在研究区捕获。刀耕火种地鼠密度高于机耕地（P0.05）.研究表明，在基于生态的或综合管理做法中，应将整地方法视为啮齿动物虫害管理的一个组成部分。在坦桑尼亚的玉米地中，玉米最容易受到M. natalensis在种植后的前2周，因此，较低密度的啮齿动物将导致较低的作物损害在拖拉机耕地。
A capture-mark-recapture study was conducted in crop fields in Morogoro, Tanzania, to investigate how the population dynamics of multimammate field rats, Mastomys natalensis, was influenced by the commonly practised land preparation methods and cropping systems. Two land preparation methods (tractor ploughing and slash and burn) and two cropping systems (mono-cropping with maize and inter-cropping with maize and beans) were investigated in a Complete Randomized Design experiment with 2 · 2 factors, and two 0.5 ha replicates per treatment. Mastomys natalensis comprised 97.8% of the abundance of the three rodent species captured in the study area. The slash and burned fields had higher rodent population densities than tractor ploughed fields (P 0.05]. The study shows that land preparation methods should be considered a component of rodent pest management in ecologically based or integrated management practices. In maize fields in Tanzania, the crop is most susceptible to damage by M. natalensis in the first 2 weeks after planting, and therefore, lower densities of rodents will result into lower crop damage in tractor ploughed fields.