HAP币R每 INTRODUCT-IONOFPEANTS 物别种 BY s Niu Yingze 牛应中 Dept,of Plant Breeding and seed Engineering
CHAPTER 4 INTRODUCTION OF PLANTS 植物引种 BY Niu Yingze （牛应泽） Dept. of Plant Breeding and Seed Engineering
8 1 Implication of Plant Introduction 植物引种的作用 What is plant introduction? Narrow sense---introduction of superior cultivars Broad sense---introduction of plants(or crops) 2. Implications of Plant introduction p.50-52
1. What is plant introduction? Narrow sense---introduction of superior cultivars Broad sense---introduction of plants (or crops) 2. Implications of Plant introduction p.50-52. §1 Implication of Plant Introduction 植物引种的作用
1. Promotion of agricultural Production Historicalintroduction of crops Recent introduction of crops 2. Enriching Breeding germplasm Elite crop cultivars Wild plant species Breeding lines 3. Enhancing yield by cultivation in Alien Environments Harvesting for vegetative products(Hemp, flax, jute)
1. Promotion of Agricultural Production Historical introduction of crops Recent introduction of crops 2. Enriching Breeding Germplasm Elite crop cultivars Wild plant species Breeding lines 3. Enhancing yield by Cultivation in Alien Environments Harvesting for vegetative products (Hemp, flax, jute)
82 Principles of Plant Introduction 植物引种的原理 1. Theory of similarity in Climate气候相似论 P.53. 2. Conception of Ecological environment and ecological types p54. Ecological factors 生态因素 including climatic(T, Light, Water), Soil, Living organism factors Ecological environment生态环境 Ecological region 生态地区 Plant ecological type生态类型
§2 Principles of Plant Introduction 植物引种的原理 1. Theory of Similarity in Climate 气候相似论 P. 53. 2. Conception of Ecological environment and ecological types p54. Ecological factors 生态因素 including climatic (T, Light, Water), Soil, Living organism factors Ecological environment 生态环境 Ecological region 生态地区 Plant ecological type 生态类型
3. Relationship between Important Ecological Factors Characteritics of Cultivars and Introduction 1. Temperature factors Response of crops to temperatures Higher temperature----fastercrop growth----shorter duration Upper limit, lower limit, critical temp. optimum temp Vernalization(春化作用) in winter crops 2. Light factors Length of day: long day >12h; short day 12h Response to light: long-day crops: Wheat, Barley short-day crops: Rice; maize Intensity of Light: Depending on the altitude 3. Precipitation and humidity Yearly amount Yearly distribution and seasonal distribution vS requirement of crops for water Air humidity
3. Relationship between Important Ecological Factors, Characteritics of Cultivars and Introduction 1. Temperature factors Response of crops to temperatures: Higher temperature----faster crop growth----shorter duration Upper limit, lower limit, critical temp., optimum temp. Vernalization (春化作用）in winter crops 2. Light factors Length of day：long day >12h; short day < 12h Response to light: long-day crops: Wheat, Barley short-day crops: Rice; Maize Intensity of Light: Depending on the altitude 3. Precipitation and Humidity Yearly amount Yearly distribution and seasonal distribution vs. requirement of crops for water Air humidity