Effects Of Saline-Alkali Stress On Mesembryanthemum Crystallinum Growth

The problem of soil salinization is becoming more and more serious in the global context,especially in the eastern coastal areas and arid areas in the northwest,which seriously affect the growth of crops.For most of the salt tolerant crops,the effect of planting on saline-alkali soil is different.The effects of salt and alkali on the growth of crops are mainly due to the high concentration of Na+and the high concentration of CO₃2-and HCO₃-.Therefore,the improvement of salinity and rational use of salt Saline is currently our biggest problem.A new type of healthy vegetables,which belongs to the typical salted crop,has strong resistance to salt and alkali.In this paper,the Mesembr yanthemum crystallinum L is used as the experimental material,and the method is based on single salt（Na₂CO₃: Na HCO₃ = 1: 9）was used as the treatment,and the concentration of salt and alkali mixed solution was treated.Under salt stress,alkali stress and salt and alkali were studied under mixed stress（Na Cl solution）,The effects on the growth indexes and physiological indexes of the seedlings were studied.1.The results showed that 200 mmol / L Na Cl solution had significant and significant effect on the growth of crystal chrysanthemum and the expansion of salt capsule cells,and the effect of Na Cl solution on the content of Na Cl The results showed that the content of soluble sugar,soluble protein,chlorophyll a,chlorophyll b and chlorophyll b were significantly decreased in 200 mmol / L Na Cl solution to 600 mmol / L Na Cl solution,,Carotenoids and chlorophyll content of chlorphenols were significantly promoted.More than 800 mmol / L Na Cl solution had obvious lethal effect on the ice plant.The experiment showed that the crystal had the ability to tolerate Na Cl solution and provided the actual production A certain theoretical basis.2.in the mixed alkali solution on the impact of crystal chrysanthemum experiment,with 50 100 150 200 mmol / l Na₂CO₃ and Na HCO₃ in molar volume ratio Na₂CO₃: Na HCO₃ = 1: 9 ratio of the treatment solution,the results show that with the control group The results showed that 150 mmol / L alkaline solution had significant inhibitory effect on the plant height and stem diameter of the ice plant in50 mmol / L alkali solution at different concentrations,200 mmol / L alkaline solution on the growth of ice plant to inhibit the role of partial death.The results showed thatthere was no significant difference in the growth of ice plant in 50 mmol / L-150mmol/ L alkaline solution.More than 200 mmol / L alkaline solution had a serious inhibitory effect on the growth of ice plant.3.In the experiment,the effects of mixed alkali solution on ice plant were analyzed,and it was found that when the alkaline salt Na₂CO₃ And Na HCO₃ ratio increased,in the 450 mmol / L-550 mmol / L field,the growth of ice plant to promote the role,especially for the best mechanism of salt and alkali in the body,salt cells can store excess salt,ice full The Na+/ K+ratio in the body was the lowest,indicating that the ion had lower damage to the ice plant.At this time,the ice plant was the best,and when the mixed concentration of salinity was more than 750 mmol / l,the growth of the crystal.Inhibition of the role of metabolic ion synthesis in vivo blocked,and thus affect the plant short.In summary,the ice plant showed a certain tolerance to saline-alkali stress,and the suitable saline-alkali concentration promoted the growth of crystal chrysanthemum.The alkaline stress was greater than that of salt stress,and the saline solution in BK2 The results showed that the chlorophyll content,leaf soluble sugar content,leaf soluble protein content and root activity were significantly different from those of the control group.