The Study on Salt Tolerance of 6 Alfalfa Varieties

doi:10.7668/hbnxb.2008.01.029

Abstract

Abstract: Salt tolerance of 6 alfalfa varieties was studied by measuring the germination rate, free proline content andyield under the treatments with the different salt stress. The results showed that the germination rate, free proline contentand fresh weight of the studied varieties were significantly different in the different salt concentrations;The germinationrate of 6varieties fell rapidly under the treatments with 0?4% - 0?6% NaCl solution, while for most of varieties two peakvalues of the free proline content could be observed in a salt concentration of 0?2%- 0?3% and a salt concentration of0?5% - 0?6% separately. In addition, fresh weight of most varieties was the highest under 0?2% salt stress, and the dif -ferences of fresh weight among 6 varieties increased quickly with an increasing of salt concentrations from 0?3% to0?7%. In conclusion, salt tolerance of Zhongmu No?1 was the best among the studied varieties, and that of Longdong andGannong No?1 were the worst; On the other hand, a salt concentrations of 0?4% could be the critical point of salt toler -ance for most of alfalfa varieties.Furthermore, the salt tolerance of alfalfa varieties should be evaluated by measuring mu- lt- i indicaes, and moreover, each of indicaes used should be measured in the appropriate salt stress.

Key words: Alfalfa, Salt tolerance, Germination rate, Proline content, Yield

CLC Number:

S332.1

GUI Zhi, GAO Jian-ming, YUAN Qing-hua. The Study on Salt Tolerance of 6 Alfalfa Varieties[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2008, 23(1): 133-137. doi: 10.7668/hbnxb.2008.01.029.

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