【摘要】 试验选用适宜稀植栽培的三个春小麦品种,设三个处理A1:600万株.hm-2(三叶期开沟施肥),A2:450万株.hm-2(三叶期开沟施肥,花期叶面喷肥),A3:300万株.hm-2(花期叶面喷肥)。结果表明,三个品种旗叶叶绿素总量Chl(a+b)和叶绿素a/b值变化规律不同,东农122、龙麦26的Chl(a+b)最大值出现在300万株密度下,克丰6出现在450万株密度下。稀植栽培下比叶重也有不同程度提高,东农122、龙麦26在A1、A2处理下明显高于A3处理。更多还原

【Abstract】 Three spring wheat varieties which suitable for low seeding cultivation were selected for the experiment.Three experimental treatment were desigend as follow,A1: 6 million basic seedings per hectare(fertilization in three leaves stage),A2: 4.5 million basic seedings per hectare(fertilization in three leaves stage and foliar in flower stage),A3: 3 million basic seedings per hectare(foliar in flower stage).The results showed that Chl(a+b)and Chl a/b of flag leaf have different changing regulations,the maximum Chl(a+b) of Dong-nong122 and Longmai26 is under 3 million seedings and Kefeng6 is under 4.5 million seedings.The low density can also improve the SLW,the SLW of Dongnong122 and Longmai26 under A1,A2 is higher than A3 treament.更多还原