Abstract:

To address the issue of low fruit setting rates caused by low temperatures and insufficient sunlight during the flowering period of Myrica rubra Dongkui，this study investigated the effects of pruning period and foliar nutrition on fruit setting rate and fruit quality of Myrica rubra.The results showed that under spring pruning treatment，the fruit setting rate reached 14.44%，which was significantly（p<0.05）higher than the no pruning treatment by 4.87 percentage points. Compared with spraying clear water（CK），foliar spraying of potassium dihydrogen phosphate+Cuikanghuaguoling （nutrient solution） under spring pruning can significantly increase fruit setting rate by 5.29 percentage points. The single fruit weight and soluble solids content were 24.84 g and 12.14%，respectively，which were significantly increased by 16.13% and 1.20 percentage points than those of CK. The fruit had good nutritional quality in terms of total sugar，total acid，vitamin C，total amino acids，and anthocyanin content. The yield per plant was 82.46 kg，which was 115.41% higher than that of CK. The commercial fruit rate was 78.56%，and the premium fruit rate was 63.91%. The experiment suggests that the pruning period and foliar nutrition are the key factors affecting the fruit setting rate of Myrica rubra. Spring pruning combined with foliar nutrition can improve fruit quality，increase yield，and ensure the continuous bountiful harvest of Myrica rubra Dongkui.

Key words: Myrica rubra, spring pruning, foliar nutrition, fruit setting rate, fruit quality