Abstract:

This study aimed to investigate the occurrence and development mechanism of internal browning in Prunus salicina var. cordata, specifically focusing on the impact of environmental factors, soil nutritional factors, and leaf mineral element contents on P. salicina var. cordata internal browning. Orchards with varying degrees of P. salicina var. cordata fruit internal browning at different elevations were selected for investigation. The results indicated that the bagged treatment significantly increased internal browning, and thicker fruit bagging treatments exhibited more severe internal browning than non-bagged treatments. Additionally, there was an observed increase in internal browning at lower altitudes. Furthermore, orchards with a lower incidence of internal browning demonstrated better soil conditions, with a significant increase in the content of organic matter and various elements. Correlation analysis revealed significant positive correlations between the incidence of internal browning and the contents of soil pH, phosphorus, magnesium, iron, copper in soil, and magnesium in leaves. Conversely, the contents of soil organic matter, calcium, zinc, manganese, and boron in soil were significantly negatively correlated with the incidence of internal browning. Finally, appropriately reducing orchard ambient temperature during fruit ripening and increasing the content of organic matter, soil pH, calcium, and boron in soil may reduce the incidence of internal browning.

Key words: Prunus salicina var. cordata, internal browning, element, soil, leaf, Lechang City, bagging treatment