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期 刊 ：植物遗传资源学报 2012年 13卷 1期

关键词：水稻；SPAD值；叶色；氮素；敏感；基因型；

Keywords:Rice, SPAD-value, Leaf color, Nitrogen, Sensitivity, Genotype,

摘 要 ：在大田不施氮素及高氮两个处理下，以叶片的SPAD值作为评价水稻氮素利用能力的参数，对146个不同基因型水稻进行了叶色深浅及对氮素敏感性不同的种质资源鉴定。通过测定抽穗前不同生育时期不同基因型水稻叶片的SPAD值，筛选出对氮素反应迟钝且叶色较浅基因型19个、对氮素反应迟钝且叶色较深基因型20个和对氮素敏感且叶色较浅基因型20个、对氮素敏感且叶色较深基因型11个。

Abstract:The experiment was conducted in two nitrogen treatments: one is with high nitrogen application; the other is without nitrogen supply. The indexes coming from leaf SPAD-value was used to evaluate leaf color and nitrogen sensitivity of rice among 146 genotypes before heading stage. All the tested genotypes were divided into 4 types according to their leaf SPAD-value. Type I of 19 genotypes had lower SPAD-value and lower nitrogen sensitivity. Type II of 20 genotypes had deeper leaf color and is also insensitive to nitrogen. Type III and IV included 20 and 11 genotypes of higher nitrogen sensitivity with lower and higher SPAD-value, respectively.

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