| 陈伟立,陈意,崔航,谢小林,陈杰忠,姚青.广东省砂糖橘主产区果园土壤与树体养分状况分析[J].中国南方果树,2013,42(1): |
| 广东省砂糖橘主产区果园土壤与树体养分状况分析 |
| Nutrient Status Analysis of Soil and Plants from ‘Shatangju’ Orchards in Main Production Areas of Guangdong Province |
| 投稿时间：2012-10-08 修订日期：2012-11-16 |
| DOI： |
| 中文关键词: 广东省，砂糖橘果园，叶分析，土壤养分，DRIS分析 |
| 英文关键词:Guangdong province, ‘Shatangju’ orchards, Leaf analysis, Soil nutrient, DRIS analysis |
| 基金项目: |
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| 中文摘要: |
| 为了探讨砂糖橘叶片黄化与矿质养分（尤其是镁营养）的关系，本试验对广东省砂糖橘主产区（肇庆市和云浮市）的53个果园进行土壤和叶片养分调查和分析。结果表明：砂糖橘果园土壤整体呈酸性，有机质、土壤碱解氮、速效钾和有效锌含量基本上处于适宜水平，而交换性镁和有效钙含量偏低，有效磷含量偏高；而叶片养分分析表明植株普遍缺氮、磷和镁，DRIS分析进一步表明植株还缺锌，但缺镁最为严重；相关性分析表明砂糖橘叶片中各养分间以及叶片养分与土壤pH、有机质及其有效养分间都存在着一定的相关性。结果表明，缺镁是造成砂糖橘叶片黄化的主要原因，为广东省砂糖橘的养分管理和叶片黄化控制提供了依据。 |
| 英文摘要: |
| To investigate the relationship between leaf yellowing and nutrient (especially Mg) status for ‘Shatangju’ (Citrus reticulate Blanco cv. Shatangju), nutrients in soil and leaves from 53 orchards in the main production areas (Zhongqing and Yunfu) of ‘Shatangju’ in Guangdong province were analyzed. Results indicated that ‘Shatangju’ orchard soil was acidic in total. The contents of soil organic matter (SOM), available N, K and Zn were at suitable level, exchangeable Mg and available Ca at low level and available P at high level. Leaf nutrient analysis showed that plants were lack of N, P and Mg, and DRIS analysis further indicated the deficiency in Zn and severe deficiency in Mg. Correlation analysis demonstrated the certain relationships between various nutrients in leaves, and between nutrients in leaves and soil pH, ,SOM, available nutrients of soil. Mg deficiency was the most important reason for leaf yellowing, and all the results provided the basis for the nutrient management of ‘Shatangju’ in Guangdong. |
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