《草坪管理学》课程教学课件（PPT讲稿）第4章 草坪生态

第四章草坪生态 。草坪的耐荫性 ■草坪的耐践踏性 ■草坪草种群生物学

第四章 草坪生态 ◼ 草坪的耐荫性 ◼ 草坪的耐践踏性 ◼ 草坪草种群生物学

遮荫草坪的管理 Managing Turf in Shade

遮荫草坪的管理 Managing Turf in Shade

草坪草的适应性 Adaptation of Turfgrasses 欧亚大陆起源Evolved in Eurasia 放牧压力Grazing pressure 林缘Outer edges of forests

草坪草的适应性 Adaptation of Turfgrasses 欧亚大陆起源 Evolved in Eurasia 放牧压力 Grazing pressure 林缘 Outer edges of forests

荫蔽环境 The Shade Environment 弱光Reduced light 气流弱Low air movement 高湿度High humidity 叶面长期湿润Long periods of leaf wetness 气温适中Moderated temperatures

荫蔽环境 The ShadeEnvironment 弱光 Reduced light 气流弱 Low air movement 高湿度 High humidity 叶面长期湿润 Long periods of leaf wetness 气温适中 Moderated temperatures

遮荫条件下草坪为什会死亡 Why Turf Dies in Shade 缺乏光线Lack of light 病害Diseases 树根竞争Tree root competition 践踏的影响Traffic exacerbates problem

遮荫条件下草坪为什会死亡 Why Turf Dies in Shade 缺乏光线 Lack of light 病害 Diseases 树根竞争 Tree root competition 践踏的影响 Traffic exacerbates problem

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