Zhu Yan,Yao Xia,Tian Yongchao,Analysis of common canopy vegetation indices for indicating leaf nitrogen accumulations in wheat and rice,International Journal of Applied Earth Observations and Geoinformation,2008(1).
[3]
Pagola M,Ortiz R,Irigoyen I,New method to assess barley nitrogen nutrition status based on image colour analysis:comparison with SPAD-502,Computers and Electronics in Agriculture,2009(2).
[4]
Huang J L,He F,Cui K H,Productivity and sustainability of a spring wheat-field pea rotation in a semi-arid environment under conventional and conservation tillage systems,Field Crops Research,2008(1-2).
[5]
Peng S B,Roland J B,Huang J L,Strategies for overcoming low agronomic nitrogen use efficiency in irrigated rice systems in China,Field Crops Research,2006(1).
[6]
Wu Jindong,Wang Dong,Rosen Carl J,Comparison of petiole nitrate concentrations,SPAD chlorophyll readings,and QuickBird satellite imagery in detecting nitrogen status of potato canopies,Field Crops Research,2007(1).
[7]
Wallihan E F,Moomaw J C,Selection of index leaf for studying the critical concentration of nitrogen in rice plants,Agronomy Journal,1967(5).
[8]
Peng S,Garcia F V,Laza R C,Increased N-use efficiency using a chlorophyll meter on high-yielding irrigated rice,Field Crops Research,1996(2-3).
[9]
沈掌泉,王珂,朱君艳,叶绿素计诊断不同水稻品种氮素营养水平的研究初报,科技通报,2002(3).
[10]
Wang Shaohua,Zhu Yan,Jiang Haidong,Positional differences in nitrogen and sugar concentrations of upper leaves relate to plant N status in rice under different N rates,Field Crops Research,2006(2-3).
[11]
Paradis Someth,Naritaka Kubo,Hajime Tanji,A combined technique of floodplain storage and reservoir irrigation for paddy rice cultivation,Paddy and Water Environment,2007(2).
Tian L F,Slaughter D C,Environmentally adaptive segmentation algorithm for outdoor image segmentation,Computers and Electronics in Agriculture,1998(3).
