摘要
开发了一款便携式小麦叶绿素、氮素、水分一体化测定仪,可以一次测量小麦叶片的三种生化指标,为肥水诊断提供充分依据。本测定仪由光路和电路两部分组成,光路部分采用LED加滤光片构成的组合光源,电路部分由微控制器、LED驱动电路、检测电路、通讯电路、键盘电路、液晶显示电路等组成。经过田间测试,证明此测定仪有良好的准确性和重复性。叶绿素、氮素测量的相对误差均值在10%左右,水分相对误差均值为4%,三项指标测量值变异系数均低于1.5%。测试结果表明测定仪可以用于指导小麦实际生产。
A portable meter was developed which can detect chlorophyll,nitrogen and moisture content of wheat leaf simultaneously,and can supply enough data for guiding fertilization and irrigation.This meter is composed of light path and electronic circuit.And this meter uses 660,940 and 1 450 nm LED together with narrow band filters as the active light source.The hardware circuit consists of micro-controller,LED drive circuit,detector,communication circuit,keyboard and LCD circuit.The meter was tested in the field and performed well with good repeatability and accuracy.The relative errors of chlorophyll and nitrogen test were about 10%,relative error for water content was 4 %.The coefficients of variation of the three indices were all below 1.5%.All of these prove that the meter can be applied under the field condition to guide the wheat production.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2011年第8期2294-2297,共4页
Spectroscopy and Spectral Analysis
基金
国家高技术研究发展计划(863计划)项目(2006AA10Z201)资助
关键词
小麦
叶绿素
氮素
水分
测定仪
Wheat
Chlorophyll
Nitrogen
Moisture content
portable meter
