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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。
Three spring wheat cultivars suitable for sparse planting were selected and tested. Three treatments were A1: 6 million plants .hm-2 (three-leaf stage ditching), A2: 4.5 million plants. Hmh-2 , Flowering foliar fertilizer), A3: 3000000.hm-2 (flowering foliar fertilizer). The results showed that the chlorophyll content Chl (a + b) and chlorophyll a / b in the three cultivars were different, and the maximum value of Chl (a + b) in Dongnong 122 and Longmai 26 appeared at the density of 3 million , Kefeng 6 appeared at a density of 4.5 million. The leaf specific gravity also increased to some extent under sparse planting, and Dongnong 122 and Longmai 26 were significantly higher than those under A3 treatment under A1 and A2 treatments.