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水稻的稻谷产量可以用收获时的总干物质重乘以收获指数来表示,后一数值在水稻品种之间有相当的变异。此种表示法以最简单的方式指明了最后的结果。但是,实际的稻谷产量是由一种在生育过程发生一定结果、而且其中任何之一能影响全部以后过程变化的复杂锁链所决定的。在过去二、三十年中,生理学和生态学的研究,在水稻中阐明此种过程的结果已达到相当的程度。
Paddy yield in paddy rice can be expressed as the total dry matter weight at harvest times the harvest index, with the latter value varying considerably among rice cultivars. This representation is the easiest way to indicate the final result. However, the actual output of paddy is determined by a complex chain of events that produces some result in the reproductive process and in which any one of them can affect all subsequent process changes. In the past two to three decades, studies of physiology and ecology have elucidated the results of such processes in rice to a considerable extent.