冀西北地区超高产玉米与普通玉米源库特征及其关系

以4个玉米品种为试验材料,采用田间小区试验方法比较研究了超高产玉米和普通玉米源库的特征及其关系.结果表明:群体条件下超高产品种 "郑单958"和 "纪元1号"的叶面积指数、叶绿素含量、干物质积累量等源特性和穗粒数、百粒质量、穗粒质量、产量、经济系数等库特性均高于两个普通品种;表征源库关系的茎鞘物质输出率郑单958<纪元1号<张玉1号<四单19,4个品种茎鞘物质输出率差异显著(P<0.005);粒叶比郑单958>纪元1号>张玉1号>四单19,超高产郑单958与普通品种四单19粒叶比差异极显著;本试验条件下,超高产品种郑单958和纪元1号属源库互作型,适宜在冀西北地区推广获得高产.

Source-sink Characteristics and Relationship of Super High-Yield and Common Maize Varieties in the Northwest Region Hebei Province

Source-sink relationship was studied on four cultivars comparatively.The result indicated that the source-sink character of CHL content and LAI and dry matter accumulation amount were all higher than that of the common cultivars.The sink''s character of grain per ear,100-grain weight and harvest index showed the same results.There was different significent at 0.05 among 4 cultivars; The output of stem-sheat store matter of four varieties from low level to high level was zhengdan958< jiyuanl < zhangyul < sidanl9;The ratio of grain number to leaf area between zhengdan958 and sidanl9 were significent positively different;The rank of ratio of grain number to leaf area of four varieties from high level to low level was zhengdan958 > jiyuanl > zhangyul > sidanl9.It indicated that super high-yielding zhengdan958 and jiyuanl belonged to source-sink interacted type.It was extended suitably in the Northwest region Hebei province and obtained high yield.