Analysis And Accumulation Law Of Main Mineral Elements In Tibetan Highland Barley

Mineral elements are an important part of the quality of highland barley,and also an important factor affecting its growth and yield.Variety,producing area and altitude are important factors that affect the mineral elements of highland barley,and blind application of chemical fertilizer is one of the important factors that reduce the quality of mineral elements of highland barley.This study will use inductively coupled plasma mass spectrometry(ICP-MS)to analyze the main mineral elements in different varieties of highland barley in Tibet,Zangqing 2000 and Xila 22 in different producing areas and altitudes,aiming at finding highland barley varieties with excellent mineral element quality and varieties rich in different mineral elements,and providing certain theoretical basis for highland barley processing enterprises to choose raw materials and people to eat highland barley.The contents of mineral elements in different growth stages and different parts of Tibetan Blue 2000 were analyzed,aiming at analyzing the accumulation law of mineral elements in Tibetan Blue2000 and providing theoretical basis for rational fertilization.1.Analysis of mineral elements in highland barley.The contents of 8 mineral elements in 10 different varieties of highland barley were analyzed by single factor analysis of variance,Pearson correlation analysis,principal component analysis,comprehensive score evaluation and cluster analysis,principal component analysis,comprehensive score evaluation and cluster analysis.The results showed that varieties had a very significant effect on the contents of mineral elements in highland barley.Among the 10 kinds of highland barley,there is at least one correlation,among which Zangqing 17 has the most correlation,while Lanhighland barley and Chaya black highland barley have the least correlation.The principal component analysis of eight mineral elements obtained three principal components,and the comprehensive scores obtained by principal component analysis ranked from big to small as Chaya black highland barley > black highland barley > navy blue3000 > navy blue 17 > blue highland barley > navy blue 2000 > navy blue 320 >Xila 22 > Holly 18 > Xila 23.The contents of 8 mineral elements in 10 varieties of highland barley are K>Mg>Ca>Na>Fe>Zn>Mn>Cu.Among the 10 varieties,Chaya Black Highland Barley and Cangqing 17 have the best quality of mineral elements,and Chaya Black Highland Barley is rich in potassium and zinc,which can effectively prevent and treat symptoms such as hypotension,anorexia,diarrhea,brain dysplasia and digestive dysfunction,while Cangqing 17 is rich in iron and sodium,which can effectively prevent and treat symptoms such as anemia and mental irritability.Eight mineral elements of Zangqing 2000 and Xila 22 in five cities were analyzed.The results showed that the origin had a significant influence on the mineral element content of Zangqing 2000 and Xila 22.The mineral element contents of Cangqing 2000 and Xila 22 in five cities are K > Mg > Ca > Na >Fe > Zn > Mn > Cu.The comprehensive score of navy blue 2000 is Shannan >Lhasa > Shigatse > Qamdo > Linzhi,and Xila 22 is Shannan > Linzhi > Lhasa >Shigatse > Qamdo.Principal component analysis shows that there are two principal components in Navy Blue 2000 and three in Xila 22.Cangqing 2000 and Xila 22 in Shannan region have the best mineral elements,which are rich in zinc and copper,potassium,manganese and zinc respectively.Through the analysis of eight mineral elements in Tibetan Blue 2000 and Xila 22 at different altitudes,the results show that the content of mineral elements in Xila 22 at altitude has a significant effect,but has little effect on Tibetan Blue 2000;The mineral element contents of Cangqing 2000 and Xila 22 in different altitude gradients are K > Mg > Ca > Na > Fe > Zn > Mn > Cu.Principal component analysis shows that there are two principal components in Xila 22,and the comprehensive score ranking of Xila 22 is 3500-3700 m >2900-3100 m > 3700-3900 m > 3900-4100 m.The 3500-3700 m and 3700-3900 m navy blue 2000 is rich in copper,zinc and iron,and the 3500-3700 m Xila 22 has the best mineral quality and is rich in copper,iron,potassium,manganese and zinc.2.Study on the accumulation law of mineral elements in different growth stages of Zangqing 2000.Zangqing 2000 was planted in a pot experiment,and the roots,stems,leaves and grains in seedling stage,tillering stage and mature stage were collected respectively,and eight mineral elements in different growth stages were detected and analyzed.The results showed that with the change of growth stages,the content of Ca in roots kept increasing,while the content of Cu,Fe,Mg and Mn first increased and then decreased,while the content of K,Zn and Na kept decreasing.The contents of Ca,Cu,Fe,K,Mg,Zn and Na in the stem have been decreasing,and the content of Mn first increased and then decreased.The contents of Ca,Cu,Mg and Mn in leaves increased and then decreased,while Fe,K,Zn and Na kept decreasing.In mature roots,stems,leaves and grains,Ca,Fe and Mn decrease in the order of roots > leaves >stems > grains,Cu in the order of roots > leaves > grains > stems,K in the order of stems > leaves > grains > roots,Mg in the order of leaves > roots > grains >stems,and Zn in the order of roots > grains > stems > leaves.Conclusion: With the change of growth period,the content of elements in different parts will increase or decrease.From seedling stage to tillering stage,fertilizers containing Mn,Ca,Cu and Mg can be applied appropriately,and from tillering stage to maturity stage,Zn fertilizer can be applied appropriately to ensure the quality of mineral elements in the grain of Zangqing 2000.