DCPTA与CCC复配对寒地春玉米茎秆抗倒伏特性及光合作用的影响

为了研究新型植物生长复配剂对寒地春玉米抗倒伏特性及光合作用的影响,试验选择3种化控剂进行试验,其中2种为已用于大田生产的化控剂,分别为玉黄金（YHJ）和吨田宝（DTB）,第三种为实验室自行配置的以DCPTA（2-（3,4-二氯苯氧基）-乙基-二乙胺）和CCC（氯化氯代胆碱）为主要成分的复配剂（FPJ）。结果表明,复配剂（FPJ）和玉黄金（YHJ）处理后玉米株高及穗位高降低,基部节间长度降低,基部节间直径增加。吨田宝（DTB）处理则增加了株高、穗位高和节间长度。以抽雄后10天为例,经过复配剂（FPJ）处理后的1、3、5节间长度分别比对照降低12.62%、9.49%、6.51%,而节间直径比对照增加了13.70%、12.37%、12.69%。复配剂处理能增加玉米茎叶干物质积累,部分处理差异显著。经复配剂处理后的叶面积指数与对照差异不显著。经复配剂处理后叶绿素荧光参数Fo（初始荧光）及qN（非光化学淬灭系数）数值下降,Fv/Fm（可变荧光/最大荧光）及qP（光化学淬灭系数）数值增加,这说明复配剂喷施处理不但对降低株高,增加抗倒伏性状有作用,也促进了玉米叶片光合作用,为玉米最终获得高产奠定基础。

Effects of Mixed Compound of DCPTA and CCC on Lodging Resistance Characteristics and Photosynthesis of Spring Maize in Cold Area

In order to study the effects of the new plant grow mixed compound on lodging properties and photosynthesis of spring maize in cold area. In the experiment, three kinds of the chemical control agent were selected, two chemical control agents had been used in field production, the name were Yuhuangjing and Duntianbao. The third mixtures was laboratory configuration which the main ingredient was DCPTA and CCC. The results showed that, after FPJ and YHJ agent handling, reduced plant height and ear height, reduced the length of basal internodes and increased basal diameter of maize. The treatment of DTB could increase plant height and ear height and internode length. For example, after 10 days of tasseling, compared with the control the section length of 1, 3, 5 of the treatment of mixtures reduced by 12.62%, 9.49%, 6.51% and internode diameter increased by 13.70%, 12.37%, 12.69%. Compared mixtures, the length and diameter of internode were little difference with Yuhuangjing and Duntianbao. The mixtures processing could increase dry matter accumulation of the stems of maize, part of the difference was significant. Compared with the control, the leaf area index of the treatment of the mixtures was difference, which was not significant. After treating of the mixtures, the values of chlorophyll fluorescence of Fo and qN declined, the values of Fv/Fm and qP increased in the leaf of in maize, this result showed that mixtures spraying processing not only had a role to reduce plant height, increase lodging resistance traits also promoted photosynthesis of maize, eventually lay the foundation for high yield of maize.