【作者】 姚丽贤； 周修冲； 李国良； 彭志平；

【Author】 Yao Lixian;Zhou Xiuchong;Li Guoliang;Peng Zhiping;Soil and Fertilizer Institute, Guangdong Academy of Agricultural Sciences;

【机构】 广东省农科院土壤肥料研究所；

【摘要】 钾、镁肥配施是香蕉施肥中重要的研究方向。本文研究了巴西蕉(Musa AAA Cavendish cv. Baxi)的营养特性及钾镁肥配施对其生长的影响。田间试验结果表明:假茎与叶片是养分累积的最主要部位;在整个生育期,叶片Mg/K比波动最大;为获得60t/hm2的高产,巴西蕉需要吸收N 275.3 kg、P 24.6 kg、K 900.0 kg、Ca 151.2 kg、Mg 73.2 kg、S 23.9 kg、Fe 2091.7g、Mn 2910.6 g、B 228.6 g和Zn 435.6 g;在土壤镁素丰富及Mg/K比为6.87条件下,香蕉在大量施钾的同时配施镁肥对巴西蕉的叶片营养、植株长势、蕉果农艺性状、品质及产量均没有明显影响,因此,可以不必配施镁肥。更多还原

【Abstract】 It is important to study the combined application of potassium and magnesium fertilizer in banana fertilization. This paper investigated the nutritional characteristics of Baxi banana(Musa AAA Cavendish cv. Baxi) and effect of combined application of potassium and magnesium fertilizer on its growth. Results from field trials indicated that stem and leaf were the main parts for nutrient accumulation. During its growing period, there was great variation of Mg/K ratio in leaves. Banana required 275.3 kg N、24.6 kg P、900.0 kg K、151.2 kg Ca、73.2 kg Mg、23.9 kg S、2091.7 g Fe、2910.6 g Mn、228.6 g B and 435.6 g Zn when the yield was as high as 60 t/ha. When soil magnesium was sufficient and the ratio Mg/K was 6.87, application of magnesium fertilizer had no effect on growth, yield and quality of banana when large amount of potassium was applied.更多还原