Response Characteristics of Seed Germination of Haloxylon Ammodendron to Different Salt Stress
Salt is an important factor affecting the germination and growth of plant seeds.In order to master the effects of different salt stress on the germination and growth of haloxylon ammodendron seeds,taking the artificial H.ammodendron seeds in Minqin County as the test material,different concentrations of NaCl,Na2SO4 stress and KMnO4 treatment tests were set up to determine the germination rate,germination potential,germination index,seedling length,fresh weight and other indicators of H.ammodendro.The results showed that NaCl and Na2SO4 salt stress had a significant effect on the germination and growth of H.ammodendro seeds.The tolerance concentration of H.ammodendro seeds to different salts was different.The tolerance concentration of NaCl was 4%,and the tolerance concentration of Na2SO4 was 6%.KMnO4 treatment can increase the tolerance concentration of NaCl to 6%,and the reduction effect of NaCl stress is stronger than that of Na2SO4,indicating that the degree of salt stress affects the germination of haloxylon ammodendron seeds.The inhibition of NaCl on the germination of haloxylon ammodendron seeds is stronger than that of Na2SO4·KMnO4 treatment can significantly reduce the effect of NaCl stress on the germination of H.ammodendro seeds,which provides a scientific basis for cultivating H.ammodendro seedlings and the construction of salinized soil haloxylon forest.
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