滴施螯合态铁肥对酿酒葡萄光合特性 及产量品质的影响.

[Objective] The study aimed to explore the effects of EDTA-Fe on the photosynthetic characteristics, fruit morphology, yield and quality of wine grapes in the eastern foot of Helan Mountain in Ningxia and provided a reasonable amount of iron fertilizer for the high quality and high yield of wine grapes in the eastem foot of Helan Mountain in Ningxia. (Method)4-year-old Marselan taken as the testing material, EDTA-Fe was dripped on the basis of conventional fertilization. Through a single-factor multi-level randomized block test design, four different EDTA-Fe drip levels tas 7.50 (T1), 15.00 (T2),22.50 (13) and 30.00 (T4) kg/hm², with conventional fertilization as the trol (CK). The photosynthetic characteristics (SPAD value, intercellular CO2 concentration, stomatal conductance, net photosynthetic and transpiration rate), fruit morphology (cluster length, transverse diameter, 100-grain weight), yield and quality of wine grapes (soluble solids, titratable acidity, tannin, total phenols and anthocyanin) determined. [Result] The application of EDTA-Fe could effectively im prove the photosynthetic characteristics of wine grapes. Among them, the SPAD value of leaves in 12 treatment was the highest at fruit ripe ning period, which significantly increased by 19.71% compared with CK; The net photosynthetic rate, stomatal conductance and transpiration of 13 treatment were the highest, which significantly higher than CK by 87.03%,107. 14% and 76.25%, respectively; The intercellular CO2 concentration of Tl treatment was the highest, which significantly increased by 57.56% compared with CK. The 100- grain weight decreased with the increase of EDTA-Fe concentration. The cluster length, soluble solids, sugar-acid ratio, tannin and total phe- nols content of 13 treatment e the highest, which were 10.99%,13.00%, 19.16%,4.87% and 15.23% higher than CK, respectively; The anthocyanin content of T1 treatment the highest; The yield from high to low T3 > T2 > TI > T4 > CK, Compared with CK, the yields of T1, 12, 13 T4 treatments significantly increased by 11.68%, 16.57%,26.48% and 8.96%, respectively, The value of output from high to low T3 > 12 >TI > T4>CK, T1, T2, T3 and 14 treatments 3577,5075,8133 and 2744 yuan/hm² higher than CK, respectively. [Conclusion] The application of EDTA-Fe in the wine producing area of the eastern foot of Helan Mountain can effectively promote the photosynthetic characteristics of wine grape leaves, increase the yield of wine grapes and promote the quality of wine grape. The optimum application of EDTA-Fe is 22.5 kg/hm². [ABSTRACT FROM AUTHOR]