Neighbour Effects Between two Co-Occurring Rice Species, Oryza sativa and O. Glaberrima
Neighbour Effects Between two Co-Occurring Rice Species, Oryza sativa and O. Glaberrima
复制标题
两种共生水稻品种 Oryza sativa 和 O. Glaberrima 之间的邻近效应
DOI：
10.2307/2403050
复制
发表时间：
1984
影响因子：
5.7
通讯作者：
H. Morishima
中科院分区：
文献类型：
--
作者：
Y. Sano;R. Sano;H. Morishima
(1)两个水稻品种，Oryza sativa和0。在西非的农田里，人们经常发现它们一起生长。利用从尼日利亚的高地和低地采集的这两种同域种的四个品系，研究了植物群落中物种共存对植物间相互作用的影响。通过不同水质条件下的复配试验和替代试验对它们进行了测试。(2)邻体对生长性能的影响因菌株组合和水分状况而异。一般而言，低地品系比高地品系具有更强的竞争力。(3)在同一块地采集的两种植物的混合物中，0。sativa比0. glaberrima在潮湿条件下，但不总是在干燥条件下。特别是在同域分布的高地菌株的混合物中，竞争关系往往被水分状况所逆转。(4)另一方面，低地同域株系的相对总产量显著高于单一株系，表明避免了竞争。
(1) Two rice species, Oryza sativa and 0. glaberrima, are often found growing together in farmers' fields in West Africa. The effects of species coexistence in a plant community on the interactions between plants were studied using four strains of these two sympatric species collected from upland and lowland fields in Nigeria. They were tested by mixture-diallel and substitutive experiments under different water conditions. (2) Neighbour effects on growth performances differed markedly according to strain combinations as well as water regime. In general, lowland strains were stronger competitors compared to upland strains. (3) In mixtures of the two species collected from the same field, 0. sativa was more strongly competitive than 0. glaberrima under wet conditions but not always under dry conditions. In mixtures of upland sympatric strains especially, the competitive relationship tended to be reversed by water regime. (4) Lowland sympatric strains, on the other hand, showed a Relative Yield Total significantly higher than unity, suggesting avoidance of competition.