摘要
为确定重庆市柑桔园土壤酸碱度及金属元素的含量状况及变化特征,2008年对重庆104个柑桔园的土壤农化样(树冠周围)和背景样(树间对照区)进行采样分析。结果表明,84.6%的植桔土壤pH值呈下降趋势,平均降幅为9.6%,56.8%的柑桔园土壤pH小于6.5,与背景样相比,土壤pH值小于5.5的果园明显增加,占调查总数的32.7%;7.8%的柑桔园土壤pH在4.8以下,不适合柑桔的生长。随着pH的降低,土壤有效钙、有效镁含量呈降低趋势,而土壤有效铁、有效锰、有效铜和有效锌含量则明显上升,进一步酸化可能对柑桔生长产生毒害,在柑桔的栽培管理中,应采取必要措施进行防治。
In order to understand fully characteristics of soil acility and alkalinity,metal element contents of citrus orchards in Chongqing,soil pH and available nutrition content of agrochemical soil（around trees crown） and background soil（between tree lines） from 104 citrus orchards were detected in 2008.The results showed that soil pH decreased by 9.6% in 84.6% citrus orchards and soil pH value was below 6.5 in 56.8% citrus orchards.Soil pH were below 5.5 in 32.7% citrus orchards.Around 7.8% citrus orchards did not fit to grow citrus for their low pH value（below 4.8）.Along with the decrease of soil pH,the contents of soil available calcium（Ca） and magnesium（Mg） reduced while available iron（Fe）,manganese（Mn）,copper（Cu） and zinc（Zn） increased evidently.Further acidification of soil may be harmful to citrus and effective measures should be taken to protect soil of citrus orchards.
出处
《水土保持学报》
CSCD
北大核心
2011年第5期191-194,199,共5页
Journal of Soil and Water Conservation
基金
农业部公益性行业科研专项"最佳养分管理技术研究与应用"(201103003)
关键词
柑桔园
土壤PH
金属元素
cirtrus orchard
soil pH
metal element
