Field experiment was conducted to study the effect of foliar spray of organic calcium(calcium citrate,0.2%)and inorganic calcium(calcium nitrate,0.2%)on calcium nutrition,fruit development and fruit quality of gold silk thread jujube.The 20 yearold Laoling gold silk jujube trees were used as test materials.During the growing seasons,the fruit growth index and the calcium content in leaves and fruits were measured for four times,and at the harvest days selected fruit quality index was measured.The preliminary results showed that foliar spraying organic and inorganic calcium significantly increased calcium content in the gold silk thread jujube fruits and leaves,increased the soluble sugar content in fruits,and increased the single fruit weight and fruit shape index.Spraying calcium fertilizer also significantly increased the leaf SPAD values due to the improving of the leaf nitrogen nutrition.Spraying calcium citrate significantly increased the proportion of high quality fruit and reduced the proportion of low quality fruit.Thus both calcium fertilizers can be used in future to improve the nutritional status of gold silk thread jujube and enhance fruit development although the foliar spraying of calcium citrate is better than calcium nitrate.