穴盘基质拌施烯效唑对不同品种生菜幼苗生长发育的影响  

Effects of Different Concentrations of Uniconazole in Plug Media on Growth and Development of Lettuce Seedlings

作　　者：王俊杰 廖雅汶 王雅青 陈祥磊 王志雯 朱桢栀 姚锋先[1] 朱博 成臣 WANG Junjie;LIAO Yawen;WANG Yaqing;CHEN Xianglei;WANG Zhiwen;ZHU Zhenzhi;YAO Fengxian;ZHU Bo;CHENG Chen(Life Sciences College,Gannan Normal University/Ganzhou Key Laboratory of Greenhouse Vegetable,Ganzhou 341000,China)

机构地区：[1]赣南师范大学生命科学学院/赣州市设施蔬菜重点实验室,江西赣州341000

出　　处：《广东农业科学》2022年第2期16-23,共8页Guangdong Agricultural Sciences

基　　金：江西省重点研发计划项目(20171ACF60007,20203BBFL63065);江西省科技平台建设项目(2017PTGCD0052)。

摘　　要：【目的】明确穴盘基质拌施不同浓度烯效唑对不同品种生菜幼苗生长发育的影响。【方法】以5个南方生菜品种为材料,研究穴盘基质拌施不同浓度(0~50 mg/L)烯效唑对生菜生长、叶型参数及可溶性固形物(TSS)含量的影响。【结果】随着烯效唑拌施浓度增加,各品种生菜幼苗根鲜、干重以及地上部鲜重、干重均表现为先增加后下降,耐抽苔生菜和罗马直立生菜的根鲜重和根干重在10 mg/L烯效唑处理最大,其余品种上述指标在5 mg/L烯效唑处理最大。幼苗总叶宽、最大功能叶叶宽和总叶面积同样在5 mg/L烯效唑处理下达最大,奶油生菜幼苗总叶宽和总叶面积均比其他品种大。在幼苗根冠比上,玻璃生菜、奶油生菜和耐抽苔生菜随烯效唑浓度增加而增加,中国香港软尾生菜和罗马直立生菜则先增后降。此外,在50 mg/L烯效唑处理下各品种生菜幼苗SPAD值显著增加,而株高、总叶面积、TSS积累受到严重抑制。【结论】基质拌施适宜浓度(5 mg/L)烯效唑育苗可以培育壮苗,若浓度过高则会抑制生菜幼苗生长发育。【Objective】The study was carried out to explore the effects of different concentrations of uniconazole in plug media on the growth and development of different varieties of lettuce seedlings.【Method】Five lettuce varieties in southern China were used to study the effects of different concentrations(0-50 mg/L)of uniconazole on seedling growth,leaf shape parameters and soluble solids(TSS)of lettuce.【Result】With the increase of uniconazole concentration,the root fresh weight,root dry weight,shoot fresh weight and shoot dry weight of seedlings of various lettuce varieties increased first and then decreased.The root fresh weight and dry weight of bolting-tolerant lettuce and Roman upright lettuce were the highest under 10 mg/L uniconazole treatment,and those of other varieties were the highest under 5 mg/L uniconazole treatment.The total leaf width,maximum functional leaf width and total leaf area of seedlings also reached the maximum under 5 mg/L uniconazole treatment.The total leaf width and total leaf area of butter lettuce seedlings were larger than those of other varieties.The root-shoot ratio of iceberg lettuce,butter lettuce and bolting-tolerant lettuce increased with the increase of uniconazole concentration,while the root-shoot ratio of Hong Kong soft-tail lettuce and Roman upright lettuce increased first and then decreased.In addition,under the treatment of 50 mg/L uniconazole,SPAD values of lettuce seedlings of all varieties increased significantly,while plant height,total leaf area and TSS accumulation were severely inhibited.【Conclusion】Strong seedlings of lettuce could be cultivated by the medium with suitable concentration(5 mg/L)of uniconazole.The growth and development of lettuce seedlings would be inhibited by higher concentration of uniconazole.

关 键 词：烯效唑 生菜 幼苗生长 叶型参数 可溶性固形物 

分 类 号：S636.2[农业科学—蔬菜学]