Abstract:
Objective To study the effects of a new type of fulvic acid water-soluble fertilizer instead of chemical fertilizer on the photosynthetic characteristics and fruit quality of walnut, and to explore the application effect of fulvic acid water-soluble fertilizer instead of chemical fertilizer on walnut, so as to provide a theoretical basis for improving the quality and efficiency of walnut and sustainable green development.
Methods 'Wen185' walnut was used as experimental material, a randomized block experiment was conducted, and three fertilization treatments were set up, with each treatment repeated 3 times, and no fertilization was used as control (CK). Conventional chemical fertilizer treatment (CG) and fulvic acid water soluble fertilizer treatment (SR) were set. Leaf traits, photosynthetic characteristics, yield, quality and fatty acid composition of walnut were measured at fruit maturity stage, and the effects of a new type of fulvic acid water-soluble fertilizer to replace chemical fertilizer on walnut were analyzed.
Results The leaf length, width, thickness, leaf area and dry matter ratio of walnut treated with xanthorhuic acid were increased, and the chlorophyll content, Pn, Ci, gs and Tr were all higher than those of CK. The single fruit weight and yield of walnut were significantly increased by SR treatment, which were 42.01% and 39.45% higher than those of CK, respectively, and the three-diameter value of walnut was increased. Compared with CK, the contents of protein, reducing sugar and fat were increased by 6.11%, 77.08% and 4.06%, respectively, and the contents of linoleic acid, linolenic acid, palmitic acid and stearic acid were increased by 2.01%, 11.45%, 6.45% and 11.84%.
Conclusion The new fulvic acid water soluble fertilizer instead of chemical fertilizer application amount of 1800 kg/hm2 treatment can improve the walnut leaf characteristics, photosynthetic characteristics, increase the yield and improve the quality.
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