Effect of seed priming with different concentrations of potassium nitrate on the pattern of seed imbibition and germination of rice(Oryza sativa L.)

作     者：Anisa Ruttanaruangboworn Wanchai Chanprasert Pitipong Tobunluepop Damrongvudhi Onwimol 

作者机构：Department of Agronomy Faculty of Agriculture Kasetsart University Bangkok 10900 Thailand 

出 版 物：《Journal of Integrative Agriculture》 (农业科学学报（英文版）)

年 卷 期：2017年第16卷第3期

页      面：605-613页

核心收录：

学科分类：07[理学] 070602[理学-大气物理学与大气环境] 09[农学] 0706[理学-大气科学] 0901[农学-作物学] 

基　　金：financially supported by a Kasetsart University 72 Year Anniversary Graduate Scholarship  from the Graduate School  Kasetsart University  Thailand 

主　　题：rice water uptake seed priming KNO3 solution germination percentage speed of germination uniformity of germination 

摘      要：Low germination and vigor of rice seed associated with dry-seed broadcasting are common problems encountered by rice *** objectives of this study were to evaluate the role of potassium nitrate（KNO3）on the pattern of seed imbibition and to determine the effect of seed priming with KNO3 on the germination percentage,speed and uniformity of germination in rice *** 1 compared the patterns of seed imbibition of six concentrations of KNO3（0,0.25,0.50,1.00,1.50,and 2.00%）in two rice cultivars-KDML105 and *** results showed that soaking rice seed in KNO3 at higher concentrations could delay the imbibition *** higher concentrations of KNO3 delayed the imbibition time of rice seed and took a longer time to reach the end of phases 1 and 2 compared to the lower *** patterns of seed imbibition using distilled water of both rice cultivars（KDML105 and RD15）were quite similar,but with different concentrations of KNO3,the imbibition time taken to reach the end of phases 1 and 2 was slightly postponed in KDML105 suggesting that different rice cultivars may need different imbibition times for soaking seed in the priming *** 2 evaluated the effects of seed priming with 1.0 and 2.0%KNO3 at different imbibition *** was found that priming with 1.0%KNO3 showed better seed germination than priming with 2.0%KNO3 and seed priming with 1.0%KNO3 at the imbibition time of early phase 2（or 28 h for KDML105）improved seed germination and increased both the speed and uniformity of seed *** results of this study show promise for the use of priming with 1.0%KNO3 soaked until early phase 2 of seed imbibition for improving the seed germination and vigor of rice in dry seed broadcasting.