Maize introduction 。 Maize(Zea mays L.),known as corn in some English-speaking countries,most widely grown crop Maize is widely cultivated throughout the world. ● Hybrid maize,due to its high grain yield as a result of heterosis杂种优 ("hybrid vigor"),is preferred by farmers over conventional varieties. ■RAEG Copyright reseved by Long Mingxiu College of animal science,Northwest Agriculture Forestry University 西北农林科技大学动物科技学院草业科学系
__________________________________________________________________ College of animal science, Northwest Agriculture & Forestry University 西北农林科技大学动物科技学院草业科学系 Copyright reseved by Long Mingxiu Maize introduction • Maize (Zea mays L.), known as corn in some Englishspeaking countries, most widely grown crop Maize is widely cultivated throughout the world. • Hybrid maize, due to its high grain yield as a result of heterosis杂种优 势 ("hybrid vigor"), is preferred by farmers over conventional varieties
起源地 F■▣RAGES 玉米起源中心
__________________________________________________________________ College of animal science, Northwest Agriculture & Forestry University 西北农林科技大学动物科技学院草业科学系 Copyright reseved by Long Mingxiu
a cereal grain domesticated in Mesoamerica and subsequently spread throughout the American continents.After European contact with the Americas in the late 15th and early 16th century,maize spread to the rest of the world. 起源地 传播路线 FORAGES 玉米在世界的传播途径
__________________________________________________________________ College of animal science, Northwest Agriculture & Forestry University 西北农林科技大学动物科技学院草业科学系 Copyright reseved by Long Mingxiu a cereal grain domesticated in Mesoamerica and subsequently spread throughout the American continents. After European contact with the Americas in the late 15th and early 16th century, maize spread to the rest of the world
In 2007,over 150 million hectares of maize were planted worldwide,with a yield of 4970.9 kilogram/hectare. 。 While the United States produces almost half of the world's harvest (~42.5%),(332 million tonnes annually in the United States alone,800 million tonnes whole world in 2007).other top producing countries include China, Brazil,Mexico,Argentina,India and France. ■RAGE Copyright reseved by Long Ming College of animal science,Northwest Agriculture Forestry University 西北农林科技大学动物科技学院草业科学系
__________________________________________________________________ College of animal science, Northwest Agriculture & Forestry University 西北农林科技大学动物科技学院草业科学系 Copyright reseved by Long Mingxiu • In 2007, over 150 million hectares of maize were planted worldwide, with a yield of 4970.9 kilogram/hectare. • While the United States produces almost half of the world's harvest (~42.5%), (332 million tonnes annually in the United States alone,800 million tonnes whole world in 2007). other top producing countries include China, Brazil, Mexico, Argentina, India and France
玉 米Zea mays L Top Ten Maize Producers in 2007 Country Production(Tonnes) Note m三United States 332.092,180 People's Republic of China 151.970.000 Brazil 51.589.721 ■■Mexico 22.500.000F Argentina 21.755,364 India 16.780.000 France 13.107.000 Indonesia 12,381.561 Canada 10.554.500 italy 9.891.362 World 784,786,580[A No figure,figure.F-FAO estimate,-UnoffioialSemi-offioialmirror data.figure.A=Aggregate(may include offioial,semi- official or estimates) Source:Food And Agrioultural Organization of United Nations:Economic And Sooial Department:The Statistical Devision ■RAGE 粮饲兼用，籽实一 能量精饲料；秸杆一粗饲料；地位：畜牧 业太学粮食作角。，近代世界上玉米作为饲料用宇生产奶、肉、油 蜜等畜严盒约占总产量的75-80%。 Copyright reseved by Long Mingxiu College of animal science,Northwest Agriculture&Forestry University 西北农林科技大学动物科技学院草业科学系
__________________________________________________________________ College of animal science, Northwest Agriculture & Forestry University 西北农林科技大学动物科技学院草业科学系 Copyright reseved by Long Mingxiu 玉 米 Zea mays L. • 粮饲兼用，籽实——能量精饲料； 秸杆——粗饲料；地位：畜牧 业大于粮食作用。近代世界上玉米作为饲料用于生产奶、肉、油、 蛋等畜产品约占总产量的75-80％