弱光 Reduced Light 数量Quantity -10-20%遮荫-限制生长growing limit -50%遮荫-生理活动受到影响physiological problems -70%遮荫-衰弱明显noticeable decline 质量Quality -红光多，蓝光少Less blue,more red -出现白化Etiolation occurs
弱 光 Reduced Light 数量 Quantity – 10-20%遮荫-限制生长 growing limit – 50% 遮荫-生理活动受到影响 physiological problems – 70%遮荫-衰弱明显 noticeable decline 质量 Quality – 红光多，蓝光少 Less blue, more red – 出现白化 Etiolation occurs
光合与呼吸 Photosynthesis Respiration 光合Photosynthesis Sunlight+CO,=Chemical energy O2 -有光期间During sunny periods 呼吸Respiration Chemical energy CO2 H2O -全日24hrs/day,7days/wk 补偿点Compensation point -Photosynthesis Respiration
光合与呼吸 Photosynthesis & Respiration 光合 Photosynthesis – Sunlight + CO2 = Chemical energy + O2 – 有光期间 During sunny periods 呼吸 Respiration – Chemical energy → CO2 + H2O – 全日 24 hrs/day, 7 days/wk 补偿点 Compensation point – Photosynthesis = Respiration
上午与下午阳光的比较 Morning vs Afternoon Sun 上午阳光好4-6小时Morning sun best 4-6 hrs minimum 下午温度高并有光呼吸Afternoon Higher temperatures photorespiration
上午与下午阳光的比较 Morning vs Afternoon Sun 上午阳光好4-6小时 Morning sun best – 4-6 hrs minimum 下午温度高并有光呼吸 Afternoon – Higher temperatures = photorespiration
草坪草对弱光的反应 Turf Responds to Low Light 叶片减少Fewer leaves 叶片变长、变窄Longer,narrower leaves 表皮薄、叶稀疏Thinner cuticle,thinner leaves 根减少、变浅Less roots,less rooting depth 维管组织衰弱Vascular system breaks down
草坪草对弱光的反应 Turf Responds to Low Light 叶片减少 Fewer leaves 叶片变长、变窄 Longer, narrower leaves 表皮薄、叶稀疏 Thinner cuticle, thinner leaves 根减少、变浅 Less roots, less rooting depth 维管组织衰弱 Vascular system breaks down
病害 Diseases 粉红雪霉病Microdochium patch (pink snow mold) 白粉病Powdery mildew
病 害 Diseases 粉红雪霉病 Microdochium patch (pink snow mold) 白粉病 Powdery mildew