春玉米品种
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spring maize varieties
以上为机器翻译结果，长、整句建议使用 人工翻译 。
With 12 maize varieties used as materials, the regression relationship between the leaf number index and spike differentiation were studied under the spring and summer sowing.
以12个玉米品种为材料，在春播与夏播条件下进行玉米叶龄指数与穗分化期回归关系的试验研究。
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