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| Effect of Alternate Year Bearing Technology on Yield and Quality of Shatangju Mandarin and Its Economic Benefits Analysis |
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| DOI：10.16768/j.issn.1004-874X.2020.08.005 |
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| Abstract: |
| 【Objective】The effects of alternate year bearing technology on growth and fruiting of Shatangju mandarin （Citrus reticulate Blanco） were studied in order to provide technical references for labor saving cultivation.【Method】The experiment was carried out in 6-year-old Shatangju mandarin trees grafted on trifoliate orange. Through the application of alternate year bearing technology, the effects on plant growth and yield of Shatangju mandarin were investigated, and the fruit quality and economic benefits were analyzed.【Result】With the application of alternate year bearing technology, the average yield per plant of Shatangju mandarin in fruit-bearing years of 2016 and 2018 were 43.3 kg and 57.4 kg, respectively, which were significantly higher than those of conventional cultivation （CK）. The contents of soluble solids, total sugar and total acid were 13.2%, 12.26% and 0.51%, respectively, all of which were higher than those of CK. Due to the application of alternate year bearing technology, the conmodity rate of fruit was significantly increased, and the cost and labor intensity was significantly decreased. Compared with the conventional cultivation method, the costs of planting with the alternate year bearing technology decreased by 10.80%. The yield per unit area and output value with the alternate year bearing technology were lower than those of the CK. No significant difference was found in the net profit. The alternate year bearing technology had no obvious effect on the increase of the yield or benefit of Shatangju mandarin in Guangdong.【Conclusion】Some helpful revelations were obtained through the experiment. The intermediate cutting and open skylight pruning are suitable for the closed orchard and reasonable sparse planting is recommended for new orchard. After the treatment, the canopy of Shatangju mandarin has been dwarfed and the effect of ventilation and photopermeability has been improved, which can improve the yield, fruit quality and commodity rate significantly. Therefore, the production costs are reduced, and the economic benefits of the orchard are increased. |
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