不同催芽温度对辣椒幼苗生长指标的相关性研究

Study on Correlation Between the Germination Temperature Index on the Growth of Pepper Seedlings

以辣椒品种"羊角椒70号"为试材,研究了15、20、25、30℃恒温和25/15℃变温处理催芽温度对辣椒种子发芽的影响。结果表明:不同催芽温度对辣椒种子发芽率、发芽势、发芽指数及幼苗生长均有影响;采用25℃催芽,辣椒种子发芽率、发芽势、发芽指数分别达到97%、19%、23.42,且辣椒幼苗株高高、主根长长、叶片数多,幼苗地上部分、地下部分鲜干质量均最重,分别为18.40、9.04g和2.33、0.83g,25/15℃变温处理催芽主根长短、叶片数少,其它温度对辣椒幼苗生长差异不显著;不同催芽温度对辣椒幼苗根系活力的影响也不同,20、25℃处理辣椒苗根系活力最强,分别为108.0、109.4μg·g-1FW·h-1,30℃处理根系活力最弱为77.0μg·g-1FW·h-1;不同催芽温度处理辣椒幼苗干物质含量表现为T3(25℃)>T4(30℃)>T1(15℃)>T5(25/15℃)>T2(20℃),总叶绿素含量表现为T5>T1>T3>T2>T4,壮苗指数表现为T3>T1>T4=T5>T2,G值表现为T3>T1>T2>T5>T4,根冠比表现为T1>T3>T4>T5>T2。综上所述,25℃处理是辣椒种子发芽的最佳温度,该试验可为宁夏地区辣椒集约化催芽技术和穴盘育苗提供理论依据和技术参数。

Taking pepper variety of‘Yangjiao pepper 70＇as material,effect of different germination temperatures（constant temperature of 15,20,25,30℃treatment and variable temperatures of 25/15℃treatment）on the germination of pepper seeds were studied.The results showed that,different germination temperatures on seed germination rate,germination potential,germination index and seedling growth were affected.Under 25℃germination,germination rate reached 97%,germination potential reached 19%,germination index reached 23.42,and pepper seedling plant height,root length,leaf number reached maximum,the ground part,underground fresh and dry weight got the heaviest respectively,with 18.40 g,9.04 g,and 2.33 g,0.83 g.Under 25/15℃treatment germination root length was short,number of leaf was little,other temperature on the growth of pepper seedlings did not show significant difference.Effect of different germination temperature on root activity of pepper seedlings were different,under 20℃and 25℃,pepper seedling root system vitality were the strongest,respectively 108.0μg·g^-1FW·h^-1 and 109.4μg·g^-1FW·h^-1,under 30℃root activity was the weakest,77.0μg·g^-1 FW·h^-1.The dry matter content of different germination temperature of pepper seedlings performance was T3（25℃）〉T4（30℃）〉T1（15℃）〉T5（25/15℃）〉T2（20℃）,total chlorophyll content performance was T5〉T1〉T3〉T2〉T4,seedling index performance was T3〉T1〉T4=T5〉T2,G value showed T3〉T1〉T2〉T5〉T4,the root shoot ratio showed T1〉T3〉T4〉T5〉T2;in conclusion,25℃ was the optimum temperature for germination of pepper seeds,the experiment could provide a theoretical basis and technical parameters for pepper intensive germination and seedling in Ningxia area.