不同品种高羊茅种子吸水特性研究  

Study on Water Absorption Characteristics of Different Varieties of Tall Fescue Seeds

作　　者：江生泉[1] 杨志民 程建峰[3] JIANG Shengquan;YANG Zhimin;CHENG Jianfeng(Department of Food and Environmental Engineering,Chuzhou Vocational and Technical College,Chuzhou 239000,China;College of Agro-grassland Science,Nanjing Agricultural University,Nanjing 210095,China;College of Agronomy,Jiangxi Agricultural University,Nanchang 330045,China)

机构地区：[1]滁州职业技术学院食品与环境工程系,安徽滁州239000 [2]南京农业大学草业学院,江苏南京210095 [3]江西农业大学农学院,江西南昌330045

出　　处：《云南农业大学学报（自然科学版）》2018年第3期474-479,共6页Journal of Yunnan Agricultural University:Natural Science

基　　金：2016年安徽省高校优秀中青年骨干人才国内外访学研修重点项目(gxfx ZD2016345);2015年安徽省教育厅自科科学研究重点项目(KJ2015A423);院级科技创新团队(YJCXTD-2017-01)

摘　　要：【目的】探寻高羊茅种子动态吸水规律,分析其形态特征与种子吸水的关系,为高羊茅品种选择、节本增效提供参考。【方法】以7个品种的高羊茅(Festuca arundinacea)种子为材料,在同一水温条件下,动态测定其吸水率,并对吸水特性及与种子形态的相关性进行分析。【结果】各品种高羊茅种子最终吸水量约为种子干重的1.5倍,同一时间各品种吸水率不存在差异(P>0.05);高羊茅种子吸水率随吸水时间的延长而增加,呈现快—慢规律,表现为9 h前吸水较快,且差异达到显著水平(P<0.05),10~42 h间的变化较小,其中以9 h增加值最大(14.88%);高羊茅种子形态特征与0~42 h内的吸水量呈极显著正相关(P<0.01),以千粒重和粒宽的正相关性最大;高羊茅种子0~42 h吸水率与粒厚、粒宽呈显著相关(P<0.05),但表现为负效应,其中与粒厚的负相关性最大;参试高羊茅种子吸水率与吸水时间的回归曲线模型都为三次函数,且R2达到显著水平(P<0.05)。【结论】获得高羊茅种子吸水最佳动态回归模型方程,高羊茅种子吸水量与种子形态特征存在相关性,研究为高羊茅种子发芽的水分管理及品种选择提供理论借鉴。[Purpose]The water uptake of tall fescue(Festuca arundinacea)seeds was studied and the relationship between its morphological characteristics and seed water absorption was analyzed,which provided reference value for the selection of tall fescue and the increase of efficiency.[Method]Under the same water temperature,the water absorption rate of tall fescue seeds was determined,and the correlation between water absorption characteristics and seed morphology was analyzed.[Result]The water absorption rate of tall fescue seeds was about 1.5 times of seed dry weight,and there was no difference in the water absorption rate of the varieties at the same time(P>0.05).The water absorption rate of tall fescue seeds increased with the prolongation of water absorption time,and the water absorption of tall fescue seeds was fast and then slowed.It showed that the water uptake before 9 h was faster,and the difference reached a significant level(P<0.05),and the change between 10-42 h was relatively small,and the increase of seed water absorption was the largest(14.88%)with 9 h.The seed morphological characteristics of tall fescue turf had significant positive correlation with water absorption within 0-42 h(P<0.01),and the most positive correlation with seed water uptake of tall fescue seeds was 1 000-grain weight and grain width.The water uptake of tall fescue seeds was significantly correlated with grain thickness and grain width within 0-42 h(P<0.05),but it showed negative effects,which had the largest negative correlation with grain thickness.The regression curve model of the seed water absorption and time were cubic function(P<0.05).[Conclusion]The optimum dynamic regression equation between seed water absorption and time was obtained and the seed morphological characteristics of tall fescue turf had correlation with water absorption.The conclusion provided a theoretical reference for water management of seed germination and variety selection of tall fescue.

关 键 词：吸水率 形态特征 相关性 动态 数学模型 

分 类 号：S543.903.2[农业科学—作物学]