摘要： 通过对个玉米品种在旱作条件下的试验研究，结果表明，高产旱作玉米品种叶面积指数（LAI）大，衰退慢，成熟时LAI仍在2.0以上。吐丝后光合势明显提高，较低产品种平均增加4.8%。总光合与产量呈极显著正相关（r=0.887）。叶片光合速率增强，干物质积累增多，向外转移减少。群体穗数与产量无明显相关，但单株穗粒数与群体产量呈显著正相关（r=0.8747）。

关键词: 高产, 旱作, 玉米品种, 光合性能, 物质生产力

Abstract: The results of studies on six maize varieties without irrigation showed that high yield maize varieties had bigger LAI.It declined slowly and kept above 2.0 at mature.The leaf area duration(LAD) after anthesis obviously improved and increased evenly 46.8% more than the low yield's.Total LAD was correlated notably with yield(r=0.8867).The leaf photosynthesis rate rose.Dry matter accumulation increased and extro transferred amount decreased.The total number of spikes were not correlated evidently with yield.But the number of kenel per plant were positively significant correlated with canopy yield(r=0.8747).

Key words: High yield, Dry farming, Maize varieties, Photosynthesis, Matter productivity

中图分类号: 

• S513