为了调查古田县园地作物土壤养分状况，探讨土壤养分供应与土壤主要性质之间的关系。在古田县5种园地作物土壤上，采集耕层土壤样品7023个，调查园地作物状况，探讨土壤养分供应与土壤主要性质之间的关系。结果表明，供试园地土壤均值有机质含量为25.38 g/kg、pH 5.07、全氮含量1.2 2 g/kg、碱解氮、有效磷、速效钾含量分别为143.5、29.95、59.3 mg/kg，交换性钙、镁含量分别是226.1、422.1 mg/kg，有效硼、锌含量分别为0.15、1.22 mg/kg，各养分含量均与土壤有机质含量和pH之间呈极显著正相关。供试园地土壤全氮含量中等，碱解氮、有效磷含量较高，土壤速效钾78.51%处缺乏水平、交换性钙含量缺乏比例占89.21%，交换性镁过量、有效硼缺乏样品达96.21%，有效锌处于中等水平。提高有机质含量和改良土壤酸度应该成为供试园地土壤改善养分供应状况的根本措施。
Abstract
The status of some nutrients of 7023 surface soils (0-40 cm) of the orchards in Gutian County, Fujian Province was investigated. The relationships between the nutrients and the main soil properties were discussed. The mean pH of the soils was 5.07 and the mean organic matter content was 25.38 g/kg. The contents of total N, alkali-hydrolysable N, available P, exchangeable K, Ca and Mg, and available Zn and B were 1.22 g/kg, 143.5 mg/kg, 29.95 mg/kg, 59.3 mg/kg, 226.1 mg/kg, 422.1 mg/kg, 0.15 mg/kg and 1.22 mg/kg, respectively. The contents of the above soil nutrients all increased with the increase in soil organic matter content and soil pH. It is concluded that the orchard soils were excessive in exchangeable Mg and available P, suitable in total N and available Zn, very poor in available K and exchangeable Ca, and poor in available B. Increasing soil organic matter content and improving soil acidity should the fundamental measurements in order to increase the supplying capacity for the soils.
关键词
园地土壤;养分;供应
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Key words
orchard; nutrient; supply
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