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对三种落黄性不同的冬小麦在大田栽培条件下,成熟期间的某些生理生化特性的测定结果表明:1.单位叶面积的叶绿素总量从开始灌浆到成熟收获都是逐渐减少,游离态叶绿素相对含最则都是逐渐增加;灌水没有改变减少或增加的趋势。2.旗叶的净光合强度与细胞的透性之间呈负相关,降雨或灌水能提高净光合强度和降低细胞的透性。3.旗叶内游离脯氨酸含量的变化与土壤水分状况之间未见有相关性,用氯化钙、磷酸二氢钾的水溶液喷洒植株,可提高旗叶内游离脯氨酸的含量。4.矮变一号的净光合强度虽比矮孟纽的高,但由于籽粒灌浆速度较慢,受高温、干旱的影响大,千粒重只及矮盂纽的58.1%。
The results showed that: (1) The total amount of chlorophyll per unit leaf area decreased gradually from initial filling to ripening, and the free-form chlorophyll Relative content of the most are gradually increased; irrigation did not change the trend of decreasing or increasing. There was a negative correlation between the net photosynthetic intensity of flag leaves and the permeability of cells. Rainfall or irrigation could increase the net photosynthetic rate and decrease the permeability of cells. There was no correlation between the change of free proline content in flag leaves and soil water status. Spraying plants with aqueous solution of calcium chloride and potassium dihydrogen phosphate could increase the free proline content in flag leaves. Although the net photosynthetic intensity of Dwarf No.1 was higher than that of Dwarf Mengniu, the effect of high temperature and drought was large due to the slow grain filling rate, and the weight of 1000 grains was only 58.1% of that of Dwarf Mengniu.