Diurnal Variations of Carbohydrate Contents and Activities of Related Enzymes in Leaves in Response to Defruiting in Peach Trees Diurnal Variations of Carbohydrate Contents and Activities of Related Enzymes in Leaves in Response to Defruiting in Peach Trees Effects of potassium on plant growth, potassium cycle and distribution in different maize genotypes Study on photosynthetic property of Cucurbita maxima