甜瓜不同时期铜敏感性

Copper Sensitivity in Different Periods of Melon

以厚皮甜瓜高代自交系M625、M44为试验材料,采用浸种和叶面喷施铜制剂的方法,研究了不同时期喷施铜制剂对甜瓜主蔓长、茎粗、最大功能叶叶面积、最大功能叶节位、最大功能叶叶绿素含量、单瓜质量、中心糖含量、病叶率和铜害指数的影响,以期为探究甜瓜不同时期铜敏感性差异提供参考依据。结果表明:不同时期喷施铜制剂均不同程度降低了2个甜瓜材料的主蔓长、茎粗、叶面积、叶绿素含量,以及产量和品质,其中苗期处理的各项指标下降幅度最大;不同时期喷施铜制剂均不同程度升高了甜瓜的最大功能叶节位、病叶率和铜害指数,且铜制剂喷施时间越早铜害表现越明显。M625和M44在苗期对铜制剂表现最为敏感,铜害程度最严重,坐瓜期次之,浸种处理与CK差异不显著,M625与M44相比之下,M625对铜制剂表现更敏感。综上所述,不同时期喷施铜制剂处理对2个甜瓜材料各项生长指标、产量、品质以及铜害指标的影响差异表现基本一致,铜敏感性排序依次是苗期>伸蔓期>坐瓜期>浸种。

M625(high-generation inbred line of thick-skinned muskmelon) and M44(high-generation inbred line of thick-skinned muskmelon) were selected as the test materials, the methods of soaking seeds and spraying copper preparations on the leaves were used to study the effect of copper preparations on the main body of muskmelon in different periods.The effects of vine length, stem diameter, maximum functional leaf area, maximum functional leaf node position, maximum functional chlorophyll relative content SPAD value, single melon mass, central sugar content, diseased leaf rate and copper damage index, in order to provide reference for exploring the different of copper sensitivity in different periods of melon.The results showed that the spraying of copper preparations at different times reduced the main vine length, stem thickness, leaf area, chlorophyll content, yield and quality of the two melon materials to different degrees, with the greatest decrease in each index at the seedling stage;the spraying of copper preparations at different times increased the maximum functional leaf nodal position, leaf disease rate and copper damage index of melon to different degrees, and the earlier the spraying of copper preparations the more obvious the copper damage performance.M625 and M44 were the most sensitive to copper preparations at the seedling stage, with the most severe copper damage, followed by the melon stage, and the difference between the seed dipping treatment and CK was not significant.In conclusion, the differences in the effects of copper sprays on the growth index, yield, quality and copper damage indexes of the two melon materials were basically the same, and the order of copper sensitivity was seedling stage>vine extension stage>melon sitting stage>seed dipping.