三峡库区部分柑桔园土壤营养状况的初步研究  

Preliminary Study on Soil Nutrient Status of Some Citrus Orchards in Three Gorges Reservoir District

作　　者：淳长品[1] 彭良志[1] 江才伦[1] 曹立[1] 雷霆[1] 王雪生 唐海涛 

机构地区：[1]中国农业科学院柑桔研究所／国家柑桔工程技术研究中心,重庆400712 [2]重庆市柑桔工程技术中心

出　　处：《中国南方果树》2009年第2期1-6,共6页South China Fruits

基　　金：国家科技支撑项目“长江柑桔带橙汁加工关键技术研究与产业化开发”(2007BAD47B04);重庆市重大科技专项“柑桔营养诊断与高效施肥技术研究与示范”(No.17415);农业部公益性行业(农业)科研专项“柑桔模式化栽培与贮藏技术研究”(nzzx07-023)资助

摘　　要：研究了三峡库区忠县、丰都县和北碚区3个县(区)27个柑桔园10～35cm土层4种土壤类型的营养状况并对其作了初步分析。结果表明,3个地区柑桔园土壤pH值多数适宜柑桔生长,土壤有机质含量普遍处于低水平;多数果园土壤大量元素的有效含量处于缺乏范围;中量元素有效Ca和Mg含量较为丰富,S含量较低;微量元素的有效含量多数处于适宜范围,但碱性紫色土有效Fe和Zn含量较少;土壤pH值与有机质含量对土壤其他有效营养元素含量影响显著。综合评价三峡库区柑桔园4种土壤类型的肥力水平依次为:水稻土>酸性紫色土>黄壤土>碱性紫色土。造成这种差异的原因与成土母质及土壤受侵蚀程度不同有很大关系。The nutrient status of soils（10-35 cm depth） of 27 citrus orchards in Zhongxian county, Fengdu county and Beibei district in Three Gorges Reservoir District were studied and analyzed. Preliminary results indicated that in most orchards the soil pH value was suitable for citrus growth, and the soil organic matter（OM）was deficient. The macronutrient contents of different soil types were deficient in most orchards and the middle nutrient were rich except S. The micronutrient contents of most soils were optimal in most orchards, but the Fe and Zn were deficient in the clay purple soil. The soil pH value and OM had significant effect on the availability of other elements. Generally, the fertility of different soils of citrus orchard in Three Gorges from high to low is paddy soil 〉 acidic purple soil〉yellow earth〉alkaline purple soil. The results can be explained by soil mother rock and the erosion degree of the soil.

关 键 词：三峡库区 柑桔园 土壤 营养状况 

分 类 号：S666[农业科学—果树学] S606[农业科学—园艺学]