摘要
作物生产过程中,缺氮会导致减产,而过度使用氮肥会导致资源浪费和地下水污染。合理施用氮肥是当前的研究热点,利用叶绿素计指导施氮肥有着快速方便无损的优点,国内外学者在利用SPAD-502叶绿素计指导作物施肥这方面开展了大量研究工作。为此,根据叶绿素含量相对值SPAD值的模型,设计了一款便携式叶绿素计。同时,详细介绍了这款便携式叶绿素计的光路设计、电路设计和机械设计并进行了田间验证试验。试验结果表明,这款便携式叶绿素计样机可以用于测量作物叶片SPAD叶绿素相对含量值,并可用于指导田间氮肥的施用。
Nitrogen deficiency causes reduction in yield,but too much nitrogen fertilizer causes ground water pollution and waste of resource.So how to rationally fertilize becomes focus of study now,and much research was carried out on guiding fertilization using chlorophyll meter SPAD-502 in and abroad.This paper designed a portable chlorophyll meter based on the SPAD model.This paper introduced the optical design,electronic circuit design,structure design and the performance of the chlorophyll meter in detail.The results of the experiments showed that the prototype performed well in the test and can be used to guide fertilization in production.
出处
《农机化研究》
北大核心
2011年第3期96-99,共4页
Journal of Agricultural Mechanization Research
基金
国家"863"高技术研究发展计划项目(2006AA10Z201)
