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在人工气候室中，对盆栽条件下不同熟期的紧凑型与平展型玉米比较研究表明，单株玉米对土壤养分的反应株型间无规律性差异；不同熟期玉米间存在明显的规律性差异。植株苗期生长速率及高低土壤肥力下的差异与叶片Ｎ、Ｋ含量，光合速率及不同光强，不同ＣＯ２浓度下的反应差异间存在明显的相关性。不同品种间苗期光合速率差异明显，土壤肥力高低对玉米苗期光合速率影响很大。
In the climatic chamber, a comparative study on compact and flattened maize with different ripening stages under potted condition showed that there was no regular difference between the single plant maize and soil nutrient response types. There were obvious regularities difference. The difference of plant seedling growth rate and soil fertility had significant correlation with N, K content, photosynthetic rate, different light intensity and reaction difference under different CO2 concentrations. Differences in photosynthetic rate of seedlings between different varieties were significant. Soil fertility had a great influence on photosynthetic rate of maize seedlings.