宜昌市窑湾乡柑橘园施肥现状及土壤肥力调查研究

对宜昌市窑湾乡柑橘产区施肥现状和柑橘园土壤肥力状况进行分析,结果表明:该区域柑橘园不施肥的占16.1%,施1次的占67.7%,施2次的占16.1%;施有机肥的农户仅占9.68%,大部分农户只施用化肥,且化肥施用比例不合理。有机肥施用少和氮肥施用相对过多,是制约柑橘产量和品质提高的重要因素。该区域柑橘园土壤有酸化的趋势,且普遍缺氮、部分缺磷、大部分缺乏有机质和速效钾,整体土壤肥力很低。与第2次土壤普查时的结果相比,表现为土壤pH值降低,有机质含量、速效钾含量下降,碱解氮、速效磷含量升高。

Investigation on Fertilization and Soil Fertility of Citrus Orchards in Yaowan Township of Yichang City

Current situation of fertilization and soil fertility of the citrus-producing area in Yaowan Township of Yichang City were analyzed.Results showed that the proportion of no-fertilizer,one-fertilizer,two-fertilizer got to 16.1%,67.7%,16.1%,respectively.The proportion of organic fertilizer was 9.68%,most of the citrus orchard only applized inorganic fertilizer,and the proportion of nitrogen,phosphate,potassium was unreasonable.Lack of organic fertilizers and overusing of nitrogen were important restrictive factors of citrus′ yield and quality.The soil of the citrus orchards in this area was acdizing.The soil was lack of nitrogen generally,most of them were lack of organic matters and available potassium,some of them were lack of phosphate.The soil fertility level was low.Compared with the results of the Second Soil Survey,the pH value was lower;the organic matter and the available potassium decreased while the available nitrogen and available phosphate increased.