Sugar Accumulation and Changes of Sucrose-metabolizing Enzyme Activitiesin Peach under Protected Culture Sugar Accumulation and Changes of Sucrose-metabolizing Enzyme Activitiesin Peach under Protected Culture Effects of calcium application on calcium content and quality of nectarine under protected culture CHARACTERISTICS OF TRANSLOCATION AND DISTRIBUTION OF ~(14)C-ASSIMILATES IN PEACH FRUIT DEVELOPMENT UNDER PROTECTED CULTURE The interactive effects of nitrogen and calcium on photosynthetic characteristics and chlorophyll fluorescence parameters of nectarine under pototected culture Comparative study on characteristics of calcium nutrition under protected culture during nectarine fruit development Occurrence situation and control strategy of Dendrobium diseases in large-scale farming system