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《Journal of Beijing Normal University(Natural Science)》 2006-02
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STUDY ON THE IMPACT OF DIFFERENT SALINITY OF SEA-ICE WATER ON SEED GERMINATION OF COTTON,WHEAT AND MAIZE

Zhang Guoming~(1,2)) Gu Wei~(1,2)) Wu Zhizheng~(3)) Shi Peijun~(1,2)) Wang Jing'ai~(3))(1)College of Resources Science and Technology;2)Key Laboratory of Environmental Change and Natural Disasters,Ministry of Education;3)College of Geography and Remote Sensing Science: Beijing Normal University,100875,Beijing,China)  
The seed germination of cotton,wheat and maize under salt stress of sea-ice water is examined.Salinity of 1,3,5,7,9()g·kg~(-1)are selected while pure water is also used as a comparison.The seeds are put in a self-controlled incubator and germinated for 7 days.Indices such as germination percentage,germinating potential,germination index,vigor index,sprout length and root length etc.are observed and recorded.The result shows that the germination percentage and germination index of the three crop types all decline as the salinity grows,but the germination percentages are still larger than 50% when the salinity is between 1 and(9()g·kg~(-1)); the seven indices of cotton are all larger than those of wheat and maize and the germination and growth of cotton can be maintained under the salinity of 5()g·kg~(-1),which indicates that the salt tolerance of cotton is comparatively high.Therefore it can be chosen as the economic salt-endurable crop to be widely grown in the region where sea-ice water is used for irrigation.However,the salinity of sea-ice water must be strictly controlled and the seeding amount should be properly increased.
【Fund】: 国家自然科学基金重点资助项目(40335048);; 国家“八六三”计划重大专项资助项目(2004AA24020)
【CateGory Index】: S513;S562;S512.1
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