地下滴灌条件下甘蔗根系和蔗地土壤速效养分分布规律的研究  

Spatial distribution of sugarcane root and soil available nutrients with subsurface drip irrigation in sugarcane field

作　　者：徐林[1,2,3] 黄海荣[1,2,3] 黄玉溢[4] 陈桂芬[4] 杨丽涛[3] 李杨瑞[1,2,3,5] 

机构地区：[1]广西甘蔗研究所 [2]中国农科院甘蔗研究中心,广西南宁530007 [3]广西大学农学院/广西亚热带生物资源保护利用重点实验室,广西南宁530004 [4]广西农科院农业资源与环境研究所,广西南宁530007 [5]广西作物遗传改良生物技术重点开发实验室,广西南宁530007

出　　处：《广东农业科学》2011年第1期78-80,共3页Guangdong Agricultural Sciences

基　　金：国家科技支撑计划项目(2007BAD30B03);广西科技攻关重点项目(桂科攻0782004-3);广西科技攻关项目(桂科能0815011);现代农业产业技术体系建设专项资金(nycytx-024-01-15)

摘　　要：为探讨甘蔗地下滴灌条件下甘蔗根系和土壤碱解氮、速效磷和速效钾的空间分布规律,从垂直和水平方向上进行分层取样测定。结果表明:垂直方向上,根重和土壤碱解氮、速效磷和速效钾的含量都呈现出随土层深度的增加而下降的趋势;0～15cm土层其含量显著高于30～60 cm土层,0～30 cm土层含量也都始终保持在较高水平;水平方向上,甘蔗根系主要分布在15～30cm处,距离滴灌带0～15 cm处土壤碱解氮、速效磷和速效钾含量都较高,各速效养分含量明显降低,随后较缓增加。To explore the spatial distribution rule of sugarcane root and soil alkalized nitrogen,available phosphorus and potassium in subsurface drip irrigation of sugarcane field,stratified samples were taken in vertical and the horizontal.The analysis exhibited that the root weight and soil alkalized nitrogen,available phosphorus and potassium contents had decreased with increasing soil depth in the vertical direction.The nutrients contents were significantly higher in 0～15 cm soil layer than in 30～60 cm soil layer,and those in 0～30 cm soil layer maintained at a higher level.On the horizontal direction,In 15～30 cm soil layer where is the major area for sugarcane root growth,for the soil at 0～15 cm from the irrigation pipe,the soil alkalized nitrogen,available phosphorus and potassium contents were higher,the available nutrients contents significantly decreased,then showed a moderate increase.

关 键 词：地下滴灌 蔗地 速效磷 

分 类 号：S566.106[农业科学—作物学]