柑桔与其他作物间作对根区土壤养分特性的影响初报  

Effect of citrus intercropping with other crops on the nutrient status of rhizospheric soils

作　　者：赵本良[1,2] 章家恩[1,2] 严文斌[1] 刘文[1] 郭靖[1] 

机构地区：[1]华南农业大学农学院生态学系,广东广州510642 [2]农业部华南热带农业环境重点开放实验室/广东省高等学校农业生态与农村环境重点实验室,广东广州510642

出　　处：《广东农业科学》2014年第3期60-64,共5页Guangdong Agricultural Sciences

基　　金：广东省产学研合作项目(2010B090400453);国家973计划项目(2011CB100406);国家科技支撑计划项目(2012BAD14B16-04);广东省现代农业产业技术体系建设专项(粤农[2009]380号);广东省农业资源区划研究课题(GD201214)

摘　　要：通过大田试验,对比研究了广东新会滩涂围垦地柑桔与花生间作、柑桔与生姜间作、柑桔单作、花生单作、生姜单作5种种植模式对根区土壤速效养分等性质的影响。结果表明:(1)5种种植模式的根区土壤pH出现分化,柑桔/花生和柑桔/生姜模式表现出极显著下降,其中以柑桔/花生间作模式的根区土壤pH最低;(2)种植7个月后柑桔/花生和柑桔/生姜两种间作模式的根区土壤速效氮含量显著高于生姜和花生单种的根区土壤速效氮含量,而两种间作模式的根区土壤速效氮含量之间无显著差异,5种种植模式的土壤速效氮含量均显著上升;(3)种植7个月后,柑桔单作的根区土壤速效磷含量明显高于柑桔/花生、柑桔/生姜以及单作花生的根区土壤速效磷含量,柑桔/生姜和柑桔/花生两种间作模式的根区土壤速效磷含量和花生单种、生姜单种之间无显著差异;(4)种植7个月后柑桔/生姜的根区土壤速效钾含量显著高于柑桔单种的根区土壤速效钾含量,桔/生姜和柑桔/花生间作模式的根区土壤速效钾含量之间无显著差异,桔/花生根区的土壤速效钾含量在种植期间显著上升;(5)5种种植模式的根区土壤有机质含量均无显著差异和时间变化。由此可见,柑桔与其他作物间作对土壤速效氮、钾等养分的转化和维持有促进作用,因而值得在该地区果园推广应用。Effects of citrus/peanut, citrus/ginger intercropping, systems and peanut, citrus, ginger monocropping systems on the nutrients status of rhizospheric soils were investigated comparatively in Xinhui reclaimed wetlands, Guangdong province. Results showed that （1） The pH value of rhizospheric soil varied greatly in the five farming systems after 7 months cultivation. The pHs of rhizospheric soils in citrus/peanut and citrus/ginger farming systems were significantly lower than those under the peanut, citrus and ginger monocropping system. Especially, the pH of rhizospheric soil of citrus/peanut farming system was the lowest among the five kinds of planting systems; （2）The contents of available nitrogen in rhizospheric soil of citrus/peanut and citrus/ginger intereropping system were significantly higher than those of peanut and ginger monocropping system. No significant difference was found between the citrus/peanut and citrus/ginger intereropping systems. Also, the available nitrogen contents in the five farming systems all improved significantly after 7- month plantation;（3） The available phosphorus content of rhizospheric soil in citrus monocropping was significantly higher than that in citrus/peanut, citrus//ginger intercropping, and peanut monocropping systems. Meanwhile, The available phosphorus contents of rhizospheric soil in citrus/peanut and citrus/ginger interplanting systems did not show any significant differences from those in the peanut and ginger monocropping systems. （4） After 7-month planting, the available potassimn content of rilizospheric soil in citrus/ginger farming system was significantly higher than that in the citrus monocropping systems; available potassium content in citrus/peanut intercropping was similar to that in citrus/ginger interplanting, and was significantly improved in 7 months. （5） The organic matter contents of rhizospheric soils in the five farming systems were very close and no obvious change with time in this study. It would be concluded that citrus/gin

关 键 词：柑桔 作物间作 根区土壤 速效养分 

分 类 号：S158.3[农业科学—土壤学]