桂西北3种核桃林土壤养分对比  

Comparison of Soil Nutrients in Three Walnut Forests in Northwest Guangxi

作　　者：霍灿灿 招礼军[1] 朱栗琼[1] 霍丽娜 刘金炽 HUO Cancan;ZHAO Lijun;ZHU Liqiong;HUO Lina;LIU Jinchi(Forestry College,Guangxi University/Guangxi Key Laboratory of Forest Ecology and Conservation,Nanning,Guangxi 530004,China)

机构地区：[1]广西大学林学院/广西森林生态与保育重点实验室,广西南宁530004

出　　处：《热带农业科学》2022年第10期10-17,共8页Chinese Journal of Tropical Agriculture

基　　金：广西创新驱动发展专项(No.AA17204058-11)。

摘　　要：探究漾濞泡核桃(Juglans sigillata)、薄壳山核桃(Carya illinoinensis)和云新核桃(Yunxin walnut)土壤养分状况,为核桃园的科学施肥与管理提供参考依据。选择20个种植有漾濞大泡核桃、薄壳山核桃和云新核桃的核桃园,采集深度为0~40 cm土层的土壤样品进行土壤pH及养分含量等指标的测定。结果显示:漾濞泡核桃、薄壳山核桃、云新核桃土壤pH分别为4.49~7.52、4.55~7.03、6.49~7.57;3个品种的核桃土壤有机质、全氮、全磷、有效磷均较为丰富,全钾、有效氮含量均比较匮乏,漾濞泡核桃、薄壳山核桃土壤有效钾含量(分别为124.02、76.12 mg/kg)较匮乏,近半数云新核桃林地土壤有效钾含量也较低;3种核桃土壤有效铁、有效锌、有效硼含量大部分处于过量水平,交换性钙较适量;不同品种间有机质、全氮、有效氮分布不均衡,且基本缺乏有效氮和钾元素。主成分分析表明,云新核桃林地土壤肥力比漾濞泡核桃、薄壳山核桃高。在核桃园管理上应充分了解土壤养分状况,根据不同核桃林土壤的差异针对性调整施肥方案,以促进核桃产业的绿色可持续发展。To explore the soil nutrient status of Juglans sigillata,Carya illinoinensis and Yunxin'walnut,so as to provide reference basis for scientific fertilization and management of walnut garden.Twenty walnut orchards planted with Juglans sigillata,Carya illinoinensis and Yunxin-walnut were selected.Soil samples with a depth of 0〜40 cm were collected for the determination of soil pH and nutrient content.The soil pH of Juglans sigillata,Carya illinoinensis and Yunxin walnut were 4.49-7.52,4.55-7.03 and 6.49〜7.57 respectively.The three varieties of walnut soil were rich in organic matter,total nitrogen,total phosphorus and available phosphorus,and lack of total potassium and available nitrogen.The soil available potassium content of Juglans sigillata and thin shell Hickory(124.02 and 76.12 mg·kg-1 respectively)were relatively scarce,and the soil available potassium content of nearly half of the new walnut forest land was also low.The contents of available iron,available zinc and available boron in the three walnut soils were mostly in excess level,and the content of exchangeable calcium was more appropriate.The distribution of organic matter,total nitrogen and available nitrogen among different varieties was uneven,and there was a basic lack of available nitrogen and potassium.Principal component analysis showed that the soil fertility of Yunxin walnut forest land was higher than that of Juglans sigillata and Carya illinoinensis.Therefore,in the management of walnut orchard,we should fully understand the soil nutrient status and adjust the fertilization scheme according to the soil differences of different walnut forests,so as to promote the green and sustainable development of walnut industry.

关 键 词：漾濞泡核桃 薄壳山核桃 云新核桃 土壤养分 主成分分析 

分 类 号：S158.3[农业科学—土壤学] S664.1[农业科学—农业基础科学]