冬作马铃薯的磷素吸收、积累、分配特征研究  

Characterisics of Phosphorus Absorption,Accumulation and Distribution in Winter Potato

作　　者：汤丹峰[1,2] 张新明[3] 陈洪 全锋[1] 伍尤国[1] 曹先维[1] 

机构地区：[1]华南农业大学园艺学院,广东广州510642 [2]广西大学农学院,广西南宁530005 [3]华南农业大学资源环境学院,广东广州510642 [4]惠东县生产力促进中心,广东惠东516300

出　　处：《热带作物学报》2013年第8期1439-1443,共5页Chinese Journal of Tropical Crops

基　　金：国家科技支撑计划课题(No.2007BAD89B14);农业部公益性行业(农业)科研专项(No.nyhyzx07-006-1);广东省农业科技攻关项目(No.2010B020315022);现代农业产业技术体系专项(No.CARS-10-ES14);省部产学研结合项目专项资金资助(No.2011B090400207)

摘　　要：田间条件下，通过布置氮磷钾肥料基追分配试验，探讨了冬作马铃薯对磷素吸收、积累和分配规律。结果表明：叶片内的磷素浓度逐渐递减；茎在齐苗后15d左右出现一个高峰，然后逐渐下降：块茎磷素浓度呈单峰变化，峰值出现在齐苗后55d左右，然后逐渐下降。非正常年型，每生产1000kg块茎需要吸收磷素（P）0．62kg；正常年型，每生产1000kg块茎需要吸收磷素（P）1．02kg。磷素在叶片中的分配率在齐苗后5d左右最高，此后逐渐下降到5％左右；茎中的分配率在齐苗后5。25d内分配率较高．随后逐渐下降：在块茎中的分配率随着生育进程迅速上升．说明块茎形成后有大量的磷素向块摹转移块摹旱磷索最终的旷存器官.The regularity of P uptake, accumulation and distribution with winter potato were studied by NPK allocation as base fertilizer and top dressing. The resuhs showed that compared with the concentration of potassium and nitrogen, the concentration of phosphorus within the leaf, stem and tuber of potato was low. Phosphorus concentration in leaves kept decreasing, that in the stems reached a peak 15 days after full seedlin emergence and then gradually decreased, while that in tuber exhibited a single peak 55 days after full seedlin emergence and then gradually decreased. Phosphorus absorbed for 1 000 kg tuber in 2009-2010 was 0.62 kg while that in 2010-2011 was 1.02 kg. The distribution rate of phosphorus in the leaves was the highest during the early growth stage （5 days after full seedlin emergence） and then fallen gradually till 5% kep; The distribution rate of phosphorus in the stem kept a high level 5-25 days after full seedlin emergence and then decreased gradually. The distribution rate of phosphorus in the tuber rose quickly with the growth process. It illustrated that a large number of phosphorus transfered to the tuber after the formation of tubers and the tuber is the ultimate storage organ of phosphorus.

关 键 词：冬作马铃薯(Solanum TUBEROSUM L.) 磷素 吸收 积累 分配 

分 类 号：S532[农业科学—作物学]