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1977年以来,我们对玉米的可见叶与展开叶的相关生长及其与生育进程的关系进行了研究,发现玉米见展叶差的变化规律,可以作为玉米生产中采取促控措施的依据,现简述如下: (一)见展叶差的变化规律 玉米见展叶差是指玉米在生育进程中可见叶龄与展开叶龄间的差值。在实际应用中可直接从最上一片展开叶向上计(不包括最上一片展开叶),已伸出一部分而未展开的叶片数,即为当时的见展叶差值。在玉米一生中,见展叶差的变化分四个阶段:
Since 1977, we have studied the relationship between the growth of visible leaf and expanded leaf of maize and its relationship with the growth process. We found that the variation law of leaf difference in corn can be used as the basis for promoting the control measures in corn production. Briefly described as follows: (a) See the law of change in the exhibition leaf corn See leaf difference is the difference between corn leaf age and leaf age in the process of reproduction. In practice, it can be calculated directly from the leaf at the top of a leaf (excluding the leaf at the top of the leaf), and the number of leaves that have been partially unfolded is the leaf difference at that time. In the maize life, see the changes in the exhibition leaf in four stages: