水土保持通报2017，Vol.37Issue(2)：96-101,6.DOI:10.13961/j.cnki.stbctb.2017.02.013
不同苜蓿品种种子发芽对盐胁迫的响应
Responses of Seed Germination of Different Alfalfa Varieties to Salt Stress
摘要
Abstract
[Objective] Considering the serious salinity grassland in western Inner Mongolia,we chose two main compositions of the saline soil,NaC1 and Na2SO4,mixed in 1 ∶ 1 molarity salt solution,to test alfalfa germination characteristics and to choose salt-tolerant alfalfa varieties that were suitable for local production.This work was expected to provide theoretical basis for alfalfa production of Western Inner Mongolia saline meadows.[Methods] A series of mixed salt solution with 11 concentrations of 0.0％,0.2％,0.4％,0.6％,0.8 ％,1.0 ％,1.2 ％,1.4 ％,1.6 ％,1.8 ％,2.0 ％ were used to test salt tolerant traits with regard to seed germination of 25 alfalfa varieties.Of which,germination rate,relative germination index and relatively simple seed vigor index were examined to rank salt-tolerant relevant varieties.[Results] Slight salt stress (0.2 ％ and 0.4％％ salt concentrations) was observed that can promoted the alfalfa seed germination.Under the two concentrations,seed germination rate,relative germination index and relatively simple seed vigor index were all increased.Obvious differences of appropriate salt concentration,half lethal salt concentration and lethal salt concentration among different alfalfa varieties existed.For most varieties,their appropriate salt concentration was 0.0％～0.6％,and half lethal salt concentration was 0.8％.Zhongcao No.3 was an exception,its half lethal salt concentration reached 1.4％.Upper limit of salt concentrations varied between 1.0％ and 2.0％ mostly.[Conclusion] Considering both results of clustering method and germination index performance,we can concluded that Zhongcao No.3 and Xinmu No.2 alfalfa varieties showed better salt tolerance and belonged to tolerant varieties.On the contrary,magnumV-wet,Chimu No.1 presented worse salt tolerance and belonged to salt sensitive varieties.关键词
苜蓿种子/盐胁迫/发芽/聚类分析/耐盐类型Key words
alfalfa/salt stress/germination/clustering analysis/salt tolerance type分类
农业科技引用本文复制引用
巴图,赵萌莉,李倩,韩国栋,徐军..不同苜蓿品种种子发芽对盐胁迫的响应[J].水土保持通报,2017,37(2):96-101,6.基金项目
公益性行业(农业)科研专项“牧区优质牧草生产与利用”(201003023) （农业）
科技部科技支撑项目(2012BAD13B02) （2012BAD13B02）
