越桔园土壤有效养分和叶片营养状况分析

Analysis on Nutrient Element Contents of Soils and Leaves in Blueberry Orchards

从江苏省和贵州省两大越桔主产区各选取两个越桔园,分别为连云港市赣榆区和东海县越桔园,安顺市平坝区和惠水县越桔园,并于2015年7月检测4个越桔园的土壤有效养分和叶片营养含量丰缺状况,并对越桔园土壤与叶片相应营养元素含量进行相关性分析,为合理制定越桔园施肥方案提供理论依据。结果表明,除平坝区越桔园以外,其余3个越桔园均需进行土壤pH值改良和有机质含量调节;4个越桔园土壤有效养分均呈现缺氮富磷富钾状态,土壤中量元素、微量元素含量充足;叶片存在氮、磷、铜含量的缺乏,叶片其余营养元素含量适中。通过对土壤与叶片相应营养元素之间的相关性分析得知,各营养元素在土壤与叶片之间存在一定的相关性,其中钾、钙、镁、硫、硼元素在土壤与叶片之间呈显著或极显著正相关,其余营养元素在土壤与叶片之间的相关性不显著。因此得出,越桔园在营养管理上应因地制宜,建议增施有机肥及氮肥,合理施用磷、钾肥。

Available nutrients in soils and nutrient element contents of leaves in four blueberry orchards,two from Ganyu and Donghai blueberry orchards in Lianyungang city of Jiangsu province,the others from Pingba and Huishui blueberry orchards in Anshun city of Guizhou province,were detected and analyzed in July,2015.The results showed that all the orchards needed to adjust the pH value of soil and organic matter content except Pingba blueberry orchards.The four blueberry orchards all appeared with lower available nitrogen content and higher available phosphorus and potassium content in soil.The nitrogen,phosphorus and cuprum were deficiency in the leaves.Nutrients in soils were correlated with those in leaves.Contents of potassium,calcium,magnesium,available sulfur,and boron in soils showed significantly positive correlation with those in leaves,and the other nutrients showed no significant correlation.Therefore,the management of nutrition in blueberry orchards should be planed according to local conditions with more organic fertilizer and nitrogen fertilizer and appropriate phosphorus and potassium fertilizer.