不同株型玉米苗期生长,光合速率及对肥料的反应

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，光俣速率及不同光强，不同ＣＯ２浓度与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。

The Comparative Study of Seedling Growth, Photosynthesis Rate and Responses to Soil Fertility Between Erect and Horizontal Leaf Type Corn Varieties

Studies were carried out in growth room to determine the difference of seedling growth, photosynthesis rate and responses to soil fertility between erect and horizontal leaf type corn. The results indicated that there were not differences in responses to soil fertility from single plants between these two types, but differences were found among different growth--duration varieties. The seedling growth rate and its differences affected by soil fertility showed significant relationship to N. K concentration in leaf. Significant differences existed in photosynthesis rate among different varieties and the influence of soil fertility on photosynthesis rate of corn seedlings was prominent.