将生长在第四纪红粘土母质发育的红壤上的一株16年生枳砧尾张温州蜜柑进行树体解剖,结果表明。地上翻5分占全树干物重的64.5％,地下部分占35.5％,冠根比为1.8:0—40厘米土层总根量占74.3％,细根量占68.2％,为根系密集层。主要营养元素氮、磷、钾、钙以叶片中含量较高,镁以嫩梢中含量较高,根径小于2毫米的细根锌含量为叶锌含量的5倍。还测定了根际土壤化学性质及养分含量。 The 16-year-old Trifoliate orange leaves grown on the red soil with parent material of Quaternary red clay were anatomized by tree anatomy. Ground turn over 5 points accounted for 64.5% of total tree dry weight, underground 35.5%, crown to root ratio of 1.8: 0-40 cm total soil 74.3% of the total amount of roots, 68.2% of fine roots, as the root system. The main nutrient elements of nitrogen, phosphorus, potassium and calcium content in leaves higher magnesium content in the shoots higher, root diameter less than 2 mm fine root zinc content of leaf zinc content of 5 times. The rhizosphere soil chemistry and nutrient content were also determined.