平衡施肥条件下嫁接对大棚西瓜光合特性的影响  

Effects of Grafting on Photosynthetic Characteristics of Citrullus in Greenhouse under Balanced Fertilization

作　　者：钟程[1] 田鑫[1] 李性苑[1] ZHONG Cheng;TIAN Xin;LI Xing⁃yuan(Kaili University,Kaili,Guizhou,556011,China)

机构地区：[1]凯里学院,贵州凯里556011

出　　处：《凯里学院学报》2020年第3期69-75,共7页Journal of Kaili University

基　　金：贵州省科学技术基金“贵州省大豆突变体的人工诱导及高产、优质、多抗种质的选育”[黔科合J字(2014)2151]。

摘　　要：用光合测定仪对西瓜的幼苗期、伸蔓期、花期三个时期进行光合测定,用叶绿素测定仪对其叶绿素含量进行测定,记录其不同生育期所需时间.结果表明,蒸腾速率在各时期的日变化均为具有显著性差异的为双峰曲线,在12:00和16:00存在峰值,在14:00达到低谷.净光合速率总体呈具有显著性差异单峰曲线,且均在10:00有峰值.嫁接西瓜和原根西瓜的气孔导度日变化除了早上伸蔓期的8:00没有显著差异外,其余时间点均有显著差异.胞间CO2浓度均有显著差异,且原根西瓜的胞间CO2浓度均高于嫁接西瓜的.生育期比较也表明,嫁接西瓜比原根西瓜晚1周到达花期.嫁接西瓜的叶绿素含量高于原根西瓜,且各时期均有显著差异.光响应曲线拟合计算后得出,原根栽培西瓜幼苗期、伸蔓期、花期的LCP依次为18.2989、54.8255、25.3594;原根西瓜的LSP依次为1566.1303、179.1423、1041.4144.嫁接西瓜幼苗期、伸蔓期、花期的LCP依次为24.9316、40.0415、31.4533;嫁接西瓜的LSP依次为1011.3070、1666.6667、1428.5714.In this experiment,photosynthetic assay was used to determine the seedling stage,extension stage,flowering stage and three stages of watermelon,chlorophyll content was measured by chlorophyll assay,and the time required for different growth stages was recorded.According to the research and analysis,the diurnal variation of transpiration rate in each period is a bimodal curve with significant difference,and the peak value exists at 12:00 and 16:00,and reaches the trough at 14:00.Overall,the net photosynthetic rate presented a single-peak curve with significant difference,and the peaks were all at 10:00.Except that there was no significant difference in stomatal conductance of grafted watermelon and root watermelon at 8:00 in the morning,there was significant difference in other time points.There were significant differences in intercellular CO2 concentrations,and the intercellular CO2 of the original root watermelon was higher than that of the grafted watermelon.The results showed that the grafted watermelon was a week later than the original root watermelon.The chlorophyll content of grafted watermelon was higher than that of the original root watermelon,and there were significant differences in each period.According to the light response curve fitting calculation,the LCP of watermelon at seedling stage,vine extension stage and flowering stage were 18.2989,54.8255 and 25.3594 respectively.The LSP of original root watermelon was 1566.1303,179.1423 and 1041.4144,respectively.The LCP of grafted watermelon at seedling stage,extension stage and flowering stage were 24.9316,40.0415and 31.4533,respectively.LSP of grafted watermelon was 1011.3070,1666.6667 and 1428.5714 respectively.

关 键 词：西瓜 嫁接 叶绿素含量 光合特性 

分 类 号：S651[农业科学—果树学] S627[农业科学—园艺学]