【摘要】 对广西柑桔主产区果园0~30 cm土壤样品56个进行了土壤有机质和N、P、K、Ca、Mg、Fe、Cu、Zn、B含量测试分析。结果表明,土壤有机质含量比较丰富,土壤速效N、P、K缺乏分别为30.36%、32.14%和28.57%;土壤有效Ca、Mg、B缺乏比较严重,而土壤有效Fe和Cu含量过高;柑桔园土pH、有机质及多个大中微量元素有效养分之间存在显著或极显著正或负相关关系。建议在柑桔园增施Mg、B肥及石灰或其它碱性肥料,减少喷施含Cu杀菌剂。更多还原

【Abstract】 The contents of organic matter(OM),available nutrients N,P,K,Ca,Mg,Fe,Cu,Zn,and B in 56 top soil(0-30 cm) samples collected from main citrus producing areas of Guangxi were determined.The results showed that the soil organic matter in citrus orchards was in relatively high status,and the deficiency rate of available macronutrients N,P,and K was 30.36 %,32.14 %,and 28.57 %,respectively.The results also indicated that available nutrients Ca,Mg and B were considerably deficient,while available nutrients Fe and Cu were in excess level status;significant positive or negative correlation existed among soil pH,OM,and available nutrients.It was suggested that more Mg,B,lime or other alkaline fertilizer and less Cu fungicide should be used in citrus orchards.更多还原