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粵西北部丘陵地区,地理坐标约在北纬21°30’～22°40’。包括广东的阳春、阳江、电白、信宜、茂名和化县。本地区属于海洋性的低海拔副热带气候。雨量相当充沛,自1,500—2,000毫米,分布尚称均匀。全年平均气温22℃以上,冬季寒潮南侵,最低温度-2℃。土质以花岗岩及变质岩居多,其中间有小面积分布的石灰岩。大部为发育于红色风化壳上的红黄色土壤。植被历来遭受破坏,现以灌木草原及中草原占优
In the hilly area of northwestern Guangdong, the geographic coordinates are approximately 21°30’N to 22°40’N. Including Guangdong’s Yangchun, Yangjiang, Dianbai, Xinyi, Maoming and Huaxian. The area belongs to a maritime low-altitude subtropical climate. The rainfall is quite abundant, from 1,500 to 2,000 millimeters, and the distribution is still said to be uniform. The average annual temperature is above 22°C, and the winter cold wave invades south, with a minimum temperature of -2°C. Most of the soil is made of granite and metamorphic rocks, with limestone distributed in a small area. Most were red and yellow soils that developed on red weathered crusts. Vegetation has historically been destroyed and is dominated by shrubs and mid-level grasslands.