Salt Tolerance Identification Of Upland Cotton On NaCl, Na₂CO₃ And NaHCO₃

Cotton is an important and indispensable textile materials, is an important economical crop in China, is one of National economy important materials, is a economical crop with strong resistance. Cotton has salt resistance, can be grown on land that has a amount of salinity, and the region Including salinity where suitable for the cultivation of cotton can be grown in is unutilized. Therefore, in-depth study of salt tolerance of cotton, to find out a simple and convenient method for breeding salt-tolerant cotton varieties, which bred cotton varieties with higher salt tolerance, and to further strengthen the development and utilization of saline is important.1. Identification of Salt seed germination test period:First experiments with different concentrations of NaCl solution for 43 upland cotton seed stress treatment.We pick out 18 germination period of Gossypium hirsutum Linn. varieties with strong resistance, based on seed germination rate, relative germination rate, vigor index, relative vigor index and so on. It is NL11-8、Number 8、NL11-9、Number 2、Y12-4、Y12-17、NL11-21、Y12-13、 Y12-25、NL11-5、Y12-22、Y12-2、Y12-10、Y12-8、Y12-11、 Y12-16、NL11-4 and Y12-19. Then these 18 species were used in test that are use different concentration of Na2CO3 and NaHCO3, stress treatment,and we pick out six varieties whoes seed germination stage can be salt Tolerance the three sodium. It is Y12-11、NL11-8、Number 2、Number 8、NL11-9、Y12-4.2、Three sodium seed germination rate of germination when upland, germination index, vigor index has a certain impact. At low concentrations of stress on some upland cotton varieties germination and vigor index has a certain role. However, with the increase in salt concentration, high concentration of salt stress on germination and upland cotton and other activity indicators are showing a downward trend.3、Upland cotton seedling salt test:Experimenting with six varieties of upland cotton seedling salt tolerance test. Different varieties of upland cotton for salt tolerance is different. To the strength of the salt tolerance of cotton were Y12-11、NL11-8、Number 2、 Number 8、NL 11-9、Y12-4。According to tests upland cotton plant height, fresh weight, dry weight, and root to shoot ratio of three salt effects on Upland size Na2CO3> NaHC03>NaCl。...