4Puspa R P, Kataoka I, Mochioka R. Effect of red - and blue - light - emitting diodes on growth and morphogenesis of grapes [ J]. Plant Cell Tissue and Organ Culture 2008,92 (2) :147 -153.
6Roth G W, Beegle D B, Fox R H et al. Development of a quick test kit method to measure soil nitrate [ J]. Communications in Soil Science and Plant Analysis, 1991,22 ( 3/4 ) : 191 - 200.
7Jao R C, Fang W. An adjustable light source for photo - phyto - related research and young plant production [ J]. American Society of Agricultural Engineers ,2003,19 ( 5 ) :601 - 608.
8Li Q, Kubota C K. Effects of supplemental light quality on growth and phytochemicals of baby leaf lettuce [ J]. Environmental and Experimental Botany ,2009,67 ( 1 ) :59 - 64.
9Ohashi - Kaneko K, Takase M, Kon N, et al. Effect of light quality on growth and vegetable quality in leaf lettuce, spinach and komatsuna [ J ]. Enviromnent Control in Biology ,2007,45 : 189 - 198.
10Goto E ,Takakura T. Prevention of lettuce tipburn by supplying air to inner leaves [J]. American Society of Agricultural Engineers,1992, 35(2) :641 -645.