本书图文并茂、体例新颖、层次清晰、深入浅出、通俗易懂、实用性强。对于从事莴苣种植的农业从业者具有较高的参考价值。

本教材在系统介绍莴苣类型、优良品种、育苗技术、栽培模式等内容的基础上，详细介绍了莴苣主要病虫害诊断及防治、秧苗贮运技术、杂交育种技术以及市场开拓与营销等内容。全书语言简洁、通俗易懂、选材多样、内容丰富、技术先进、可操作性强。本教材适用于高等职业教育园艺技术、现代农业技术等涉农专业、高职农业类国际化人才培养以及新型职业农村培训教育使用，还可以供广大农业科技工作者学习参考。

"Contents
Module 1 Knowledge of Lettuce ……………………………………………… 1
Task 1 Origin and Evolution of Lettuce ……………………………………… 2
Task 2 Botanical, Flowering, and Pollination Characteristics of Lettuce …… 4
Task 3 Growth Cycle of Lettuce ……………………………………………… 6
Task 4 Required Environmental Conditions for Lettuce……………………… 8
Skill Training 1-1: Investigation of Lettuce Planting Worldwide …………… 12
Module 2 Types and Main Varieties of Lettuce ………………………… 17
Task 1 Types of Lettuce …………………………………………………… 18
Task 2 Main Varieties of Lettuce…………………………………………… 21
Skill Training 2-1: Study of Nutrition and Health Benefits of Lettuce ……… 38
Module 3 Lettuce Seedling Raising Technique ………………………… 41
Task 1 Seed Quality………………………………………………………… 42
Task 2 Seed Germination Conditions and Lettuce Seed Treatment ……… 45
Task 3 Lettuce Sowing and Seedling Raising ……………………………… 50
Skill Training 3-1: Seedling Raising of Lettuce in Plug Trays ……………… 54
Skill Training 3-2: Impact of Plug Tray Size on the Quality of Lettuce
Seedlings ………………………………………………… 55
Skill Training 3-3: Determination of Lettuce Seed Viability ………………… 57
Module 4 Storage and Transportation of Lettuce Seedlings …………… 62
Task 1 Preparations for Transportation …………………………………… 63
Task 2 Packaging and Transportation Tools ……………………………… 64
Task 3 Techniques to Maintain the Quality of Seedlings during Storage
and Transportation ………………………………………………… 65
Skill Training 4-1: Investigation on Lettuce Seedling Transportation ……… 70
Module 5 Lettuce Cultivation Mode and Technology …………………… 74
Task 1 Open Cultivation of Lettuce………………………………………… 75
Task 2 Lettuce Cultivation with Facilities ………………………………… 78
Task 3 Lettuce Soilless Culture …………………………………………… 85
Task 4 Organic Culture of Lettuce ………………………………………… 96
Skill Training 5-1: Preparation of Nutrient Solution ………………………… 99
Skill Training 5-2: Effects of Photoperiod on Lettuce Seedling Growth …… 107
Skill Training 5-3: Effects of Plant Growth Regulators on Lettuce Seedling Growth ………………………………………… 109
Module 6 Construction and Environmental Regulation of Protection
?????Facilities…………………………………………………………… 132
Task 1 Type and Classification of Protection Facilities …………………… 133
Task 2 Construction of Plastic Greenhouses and Solar Greenhouses ……… 141
Task 3 Control of Environmental Conditions in Facilities ………………… 150
Skill Training 6-1: Investigation on Types of Horticultural Facilities ……… 157
Skill Training 6-2: Structural Observation and Design of Plastic Arched Sheds …………………………………………………… 159
Skill Training 6-3: Application of CO2 Fertilizer …………………………… 161
Module 7 Techniques for Control of Lettuce Diseases and Pests …… 167
Task 1 Types and Control of Infectious Diseases ………………………… 168
Task 2 Types, Prevention, and Control of Physiological Diseases ………… 188
Task 3 Types, Prevention, and Control of Insect Pests …………………… 191
Task 4 Eco-friendly Techniques for Prevention and Control of Lettuce
???Diseases and Pests ………………………………………………… 195
Skill Training 7-1: Investigation of Lettuce Undernutrition ………………… 198
Skill Training 7-2: Pesticide Formulations and Application Methods ……… 201
Module 8 Lettuce Breeding ………………………………………………… 212
Task 1 Breeding Overview ………………………………………………… 213
Task 2 Breeding Objectives………………………………………………… 217
Task 3 Selective Breeding and Sexual Crossbreeding……………………… 224
Task 4 Breeding of Superior Varieties……………………………………… 226
Skill Training 8-1: Lettuce Seed Purity Analysis …………………………… 230
Skill Training 8-2: Visiting Plant Tissue Culture Laboratory ……………… 232
Skill Training 8-3: Factor Analysis for Introduction of Horticultural Plants … 233"