粤北山区地处广东省北部,为粤、赣、湘、桂四省区的结合部,气候条件独特,生态植被保存较为完好,存在不少作物种质资源。同时,部分作物品种仍以农家种为主,这些农家种由于年代久远存在不少缺点,但在抗性、品质方面仍保留其优点。近年来,随着京九铁路的开通,粤北山区商品经济得以 The northern mountainous area of ​​Guangdong is located in the northern part of Guangdong Province. It is a combination of the provinces of Guangdong, Jiangxi, Hunan and Guangxi with unique climatic conditions and relatively intact ecological vegetation. There are many crop germplasm resources. At the same time, some crop varieties are still dominated by peasant families. These peasant families, due to their long existence, have many shortcomings but still retain their advantages in terms of resistance and quality. In recent years, with the opening of the Beijing-Kowloon Railway, the northern mountainous area of ​​?? commodity economy was able to