本研究就有机栽培和化肥栽培的玉米 ,西红柿和其它作物 ,在营养体生长 ,经济产量以及对水分胁迫和病害的反应方面进行了比较。另外 ,本文在生理学分析方面采用几种新颖的数学方法。研究结果证明 ,尽管苗期生长不尽如意 ,但有机肥料促进根系的营养体生长以及生理活性 ,从而能使大多数作物的中后期光合活性增强。对切断叶的光合作用降低曲线的分析证实有机栽培的作物在彻底断水的情况下具有较强的光合活性维持能力。这与以前报道的水分胁迫回避性是一致的。因此可以下结论说 ,与化肥栽培的作物相比 ,有机栽培的作物其生理活性高 ,环境胁迫抗性强 ,可食部位的营养质量高 ,但是苗期生长往往受可给态养分不足的限制 In this study, organic, fertilizer-grown corn, tomatoes and other crops were compared in terms of vegetative growth, economic yields, and responses to water stress and disease. In addition, this paper uses several novel mathematical methods in physiological analysis. The results show that, although the seedling growth is not satisfactory, but organic fertilizer to promote root growth and vegetative activity of vegetative, which can make most crops in the late photosynthetic activity increased. Analysis of the photosynthetic reduction curve of severed leaves confirms that organic cultivated crops have strong photosynthetic activity-maintaining ability in the event of complete water breakthrough. This is consistent with the previously reported avoidance of water stress. Therefore, it can be concluded that, compared with crop cultivated with chemical fertilizers, the organically cultivated crops have high physiological activity, strong environmental stress resistance and high nutritional quality at edible parts, but the seedling growth is often limited by the deficiency of available nutrients