风选和引发处理对甜椒种子萌发及幼苗生长的影响

以甜椒种子为试材,通过风选和硝酸钾引发的方式,研究对甜椒种子萌发和幼苗生长的影响。试验设置1%硝酸钾溶液20℃下分别引发5、6、7 d,以未引发种子为对照,研究不同引发时间对甜椒种子萌发和幼苗生长的影响。结果表明,风选后甜椒种子千粒重较原种子显著增加3.25%,较不合格种子显著增加135.56%,不合格种子发芽势较CK处理显著降低43.42%,优选种子发芽率较CK处理显著提高5%。实验室发芽试验表明,发芽势各处理较CK处理显著提高58.49%、52.83%%、60.38%;发芽畸形数量各处理较CK处理显著降低73.91%、73.91%、69.57%;发芽指数各处理较CK处理显著提高了76.28%、69.87%、78.21%。穴盘育苗幼苗试验表明,在播种后47 d株高较CK处理显著提高13.21%,茎粗显著提高10.29%,叶片数显著提高9.09%,壮苗指数显著增加17.65%。综上可得,风选处理后,选用1%硝酸钾溶液,在20℃条件下,引发处理7 d能够显著提高发芽率和发芽势,促进幼苗生长,提高壮苗指数。

Effects of winnowing and priming on the seed germination and seedling growth of pepper

In order to investigate the effects of winnowing and priming on the seed germination and seedling growth of pepper.Treatments including winnowing and three priming time(5,6,7 days)at 20℃with 1%KNO3 were set in this research,and the untreated seed was used as control.The results showed that the thousand seed weight(TSW)of pepper seeds was significantly increased by 3.25%and 135.56%after winnowing treatment when compared with control and the unqualified seeds.The germination potential of unqualified seeds was significantly reduced by 43.42%compared with control,and the germination rate of selected seeds was significantly increased by 5%compared with control.Laboratory germination experiment showed that the germination energy of T5,T6 and T7 were enhanced by 58.49%,52.83%and 60.38%respectively compared with control.The malformation number of germination seed of T5,T6 and T7 were decreased 73.91%,73.91%,69.57%compared with control.The germination index of T5,T6 and T7 were improved by 76.28%,69.87%and 78.20%,respectively compared with control.The results of plug seedling showed that the plant height,stem diameter,number of leaf and seedling index of the treatment of 1.0%KNO3 primed 7 days under temperature at 20℃were enhanced by 13.21%,10.29%,9.09%,17.65%respectively compared with the control.In conclusion,the germination rate,germination potential,seedling growth and seedling index would be improved under the treatment of 1.0%KNO3 primed 7 days under temperature at 20℃after winnowing.