A plot experiment showed that there were significantly positive correlations (P?0.01)between chlorophyll meter values (SPAD values) and N content in leaves,leaf color chart(LCC)values at panicle initiation and heading stages.

• 田间小区试验结果表明；寒地水稻叶片的叶绿素值(SPAD值)在穗分化期、抽穗期与叶片含氮量及叶色卡值(LCC值)之间都呈极显著的正相关(P?0.；01)。