关键词: 氮肥利用率, 氮肥利用率, 影响因素, 提高途径, 氮肥用量, 土壤养分

Abstract: To explore the influence of different foliar fertilizers on grape fruit quality and leaf growth, five kinds of foliar fertilizers were utilized on three grape cultivars,‘Summer Black’,‘Kyoho’, and‘Jumeigui’, during different grape growing stages. After spraying, the fruit quality index and leaf growing characteristics were investigated. The results showed that, the influences of different foliar fertilizers on the fruit quality and leaf growth were significantly different. Combined spraying of different foliar fertilizers could have better result. Furthermore, there are significant differences among cultivars in regarding to the fruit quality and leaf growth after spraying. For‘Summer Black’, the fruit quality was significantly improved. The quality index had no significant difference between the treatments and CK1 (spraying water) in‘Kyoho’grape; however, the leaf growth index increased significantly after spraying foliar fertilizer. The fruit quality of‘Jumeigui’had no significant change after spraying foliar fertilizer, but the leaf growth index such as chlorophyll content and leaf area increased significantly, and the general changing trend was not obvious. Taken together, the utilization of different foliar fertilizers simultaneously could increase the fruit quality more effectively than using only one type of foliar fertilizer. Fruit quality and leaf growth of different cultivars have different responses to foliar fertilizers. Furthermore, the effectiveness of foliar fertilizers is closely related to soil fertility, soil properties, and absorbing ability of grape plant itself. Therefore, the foliar fertilizer should not be used blindly during grape production. KH2PO4 is less expensive, and has better effect, which can be recommended.