4,2 Effects on growth……………………(63) 4. 3 Effects on carbon distribution ……(74) 4. 4 Effects on Fungus-root and Root Tubercle .(76) Chapter 5 Positive Effects, Negative effects and Damaged Threhold of Acid rain…………(78) 1 Positive effects…………………………(78 5.2 Negative biological Effects………………(88) 5. 3 Relationship between Acid Rain biological Effects and Environmental factors…………(92) 5. 4 Damaged Threshold of Acid Rain on Frees and Shrubs………………(94) Chapter 6 Sensitivity of trees and Shrubs te Simulated Acid Rain (98) 6. 1 Relative Sensitivity of Different organs of Trees and Shrubs…………………………………(98) 6. 2 Sensitivty Ordination Based on Root, Stem and Leaf, Respectivel. ……………………(98) 6. 3 Sensitivity Difference of Different Age Trees and Shrubs to Simulated Acid Rain…………(99) 6.4 Relative Sensitivty of Different Age Leaf ...(100) 6. 5 Relationship between Sensitivty and Leaf Textile, Morphological Characteristics.-(101) 6. 6 Sensitivity Differences of Trees and Shrubs to Diffrent Chemical Composition Acid Rain ..(101) 6. 7 Relationships between Sensitivity of Trees and Shrubs and soil Conditions……(102) 6. 8 Sensitivity Difference of Soil ph and Sap ph to Acidification from Acid Deposition………(103) 「T