Abstract:
【
Objective】This study aimed to investigate the effects of different plant Jiaosu nutrient solutions on yield and quality of Orah, providing reference for Orah production and fruit and vegetable waste valorization.【
Method】Diffe-rent plant Jiaosu nutrient solutions were uniformly sprayed on leaves of Orah trees at the fruit expansion-ripening stage. Plant Jiaosu nutrient solutions used on treatment A and treatment B were made from cull Orah fruits and discarded cabbage leaves, with an equal spray of purified water as the control treatment (CK). Relative chlorophyll content (SPAD value), nitrogen content, phosphorus content, potassium content, amino acid content in leaves and fruits, fruit yield traits, and quality indicators under different treatments were determined. Correlation analysis was conducted on leaf indicators, fruit mass, and fruit quality indicators.【
Result】The two treatments of spraying plant Jiaosu nutrient solutions effectively increased the SPAD value of leaves, single fruit weight, and total amino acid contents in leaves and fruits, which were significantly higher than those of CK (
P<0.05, the same below); the treatment A exhibited better effects than treatment B. Spraying plant Jiaosu nutrient solutions significantly increased the nitrogen content of leaves, but had little effects on nitrogen content, phosphorus content, and potassium content in Orah fruits. Vitamin C content, soluble sugar contents, total sugar content, and sugar-acid ratio were positive indicators affecting fruit quality. The four indicators of treatment A were significantly higher than those of treatment B and CK; for treatment B, only the sugar-acid ratio was significantly higher than that of the CK, whereas the other three parameters showed no significant differences compared with CK (
P>0.05). In terms of the negative indicators affecting Orah fruit quality (total acid content and crude fiber content), treatment A had the lowest values of both indicators, which were significantly lower than CK. The correlation network diagram of indicators showed that spraying Jiaosu nutrient solutions might affect the yield and quality of Orah fruits indirectly by influencing SPAD value, nitrogen content, potassium content, and amino acid content of leaves.【
Conclusion】Foliar spraying the two Jiaosu nutrient solutions increase yield and quality of Orah by influencing indicators such as chlorophyll content, amino acid content, and Jiaosu nutrient solutions prepared from fruits of the same plant species show better efficacy.