摘要
以华北地区小麦及玉米为研究对象,以北京市昌平区崔村镇大辛峰村种植区为例,研究了精准施肥决策系统中施肥参数,并建立了相应的数学模型。将算法模型与数据库相结合,采用线性回归的方法,计算施肥时土壤对氮、磷、钾的需求量,利用二维插值的方法,建立了实验区中已知肥力样点与区域内未知肥力样点的相关关系,从而建立了土壤肥力查询数据库。通过以上方式,结合土壤的养分含量、作物种类及目标产量等相关参数来确定实验区域的施肥量。结果表明,该系统可实现施肥量的精确控制。
Northern region wheat and corn were taken as the research main bodies,and the field of Da Xinfeng village in Cuicun Town,Changping District,Beijing was taken as an example,the parameters of precision fertilization decision-making system was researched and corresponding mathematical model was established,the algorithm model and the database were unified,linear regression method to calculate fertilizer needed like N,P,K of soil was used.Two-dimensional interpolation method was applied to calculate unknown point of the region with the test samples in the region,thus soil fertility information database was established.Through the above ways and combined with the soil nutrient,crops type and the target yield and so on,the fertilizer needed of the region was determined,which could provide theory basis for circulation agriculture.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2011年第5期193-197,共5页
Transactions of the Chinese Society for Agricultural Machinery
基金
"十一五"国家科技支撑计划资助项目(2007BAD89B04)
关键词
精准施肥
决策模型
数据库
Precision fertilization
Decision model
Database
