论文部分内容阅读
以福建省永春等10县（市）70片（≥3．5hm2）柑桔示范园为代表，通过土壤、叶片分析及施肥状况的综合诊断得出的结果表明：84％的示范园土壤显著酸化（pH＜5．5），主要是施用N、P、K化肥造成的；营养失调也普遍存在于示范围中，其中主要元素缺Ca、P吸收障碍及微量元素B、Cu的过量尤为普遍；施肥中有机肥不足，P、N肥滥用，Ca、Mg、K肥欠缺；叶片K、Mg并不简单受其土壤有效成分的影响，叶片K与土壤“全N／有效K”、“水解N／有效K”，叶片Mg与土壤“代换Mg／代换Ca”呈极显著相关（P＜0．01，r=-0．36、-0．39、0．49）。据此，对以红壤为主要土壤类型的福建柑桔产区的施肥提出了改进建议。
A total of 70 (≥3.5hm2) Citrus Demonstration Parks in 10 counties (cities), including Yongchun, Fujian Province, were selected as the representative. The results of soil and leaf analysis and fertilizer application showed that 84% of the soil samples were significantly acidified (PH <5.5), mainly caused by the application of N, P and K fertilizers. The malnutrition is also commonly found in the indicator range. The main elements are deficient in Ca and P absorption and the excessive amounts of trace elements B and Cu are especially common. Fertilizer in the lack of organic manure, P, N abuse, lack of Ca, Mg, K fertilizer; leaf K, Mg is not simply affected by the soil active ingredients, leaf K and soil “Hydrolyzed N / effective K”, leaf Mg was significantly correlated with soil “substitution Mg / substitution Ca” (P <0.01, r = -0.36, -0.39, 0.49 ). Based on this, some suggestions for improving fertilization in citrus growing areas of Fujian Province, which are mainly red soils, are put forward.