Seasonal variation of the content of mineral nutrient elements in sweet cherry fruits grown in the greenhouse

The variation regularity and correlation of the content of mineral nutrient elements(Cu,Zn,Fe,Mn,Ca,Mg and K) in leaf,flowers and fruits of sweet cherry cultivated in solar green-house were studied.The content of seven mineral nutrient elements decreased from the initial blooming to end florescence,which were higher in the early days of fruit development,lower in the late period and had a regularity of decrease,stable and decrease.There was distinctly positive correlation between the variations of seven kinds of mineral nutrient elements.A distinctly positive correlation existed between leaf and fruits for Cu and Zn.As for Ca and Mn,there was a distinctly negative correlation.But the correlation was not marked for others.The order of seven kinds of mineral nutrient elements' content(average value) in fruits is as follows: CaKMgMnFeZnCu.