| Study on water and fertilizer production function for yield and quality of navel orange under drip irrigation |
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| DOI：10.7606/j.issn.1000-7601.2023.05.09 |
| Key Words: navel orange water and fertilizer production function drip irrigation yield quality |
| Author Name | Affiliation | | DENG Qingling | State Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource & Hydropower, Sichuan University, Chengdu, Sichuan 610065, China | | CUI Ningbo | State Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource & Hydropower, Sichuan University, Chengdu, Sichuan 610065, China | | CHEN Fei | State Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource & Hydropower, Sichuan University, Chengdu, Sichuan 610065, China | | LI Xiaomeng | Luzhou Economic Crops Station, Luzhou,Sichuan 646000,China | | HU Xiaotao | Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A & F University, Yangling, Shaanxi 712100, China | | LI Qiugang | Luzhou Economic Crops Station, Luzhou,Sichuan 646000,China | | GUAN Min | Luzhou Economic Crops Station, Luzhou,Sichuan 646000,China | | LI Minghong | Luzhou Economic Crops Station, Luzhou,Sichuan 646000,China | | ZENG Yun | Luzhou Economic Crops Station, Luzhou,Sichuan 646000,China | | WANG Yan | Luzhou Economic Crops Station, Luzhou,Sichuan 646000,China |
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| Abstract: |
| ‘Newhall’ navel orange was used as the test material. Two water deficit levels (high and low water treatment, noted as HW and LW, and the perfusion volume was 70% and 55% of CK, respectively) and three fertilization levels (high, medium and low fertilizer, noted as HF, MF and LF, were applied at 80%, 60% and 40% of CK, respectively) were set at the shoot flowering stage (I), young fruit stage (II), fruit expansion stage (III) and fruit maturity stage (IV). The fertilizer application rates were 80%, 60% and 40% of CK, respectively with control treatment (CK). The irrigation amounts of CK treatment were 136.43, 204.65, 272.86 m3·hm-2 and 136.43 m3·hm-2 at stage I-IV, respectively, and the fertilizer amounts were 380.00, 645.00, 1550.00 kg·hm-2 and 400.00 kg·hm-2, respectively. W×F-Jensen, W×F-Minhas and W×F-Rao models were used to simulate the relationship between yield and quality of navel orange and water and fertilizer consumption at different growth stages, and to evaluate the prediction performance of the models. It was found that navel orange yield, fruit mass and soluble sugar were most sensitive to water and fertilizer deficit in stage III. Vitamin C was most sensitive to water deficit in stage III and fertilizer change in stage IV. Titratable acid was most sensitive to water deficit in stage I and stage IV, and most sensitive to fertilizer change in stage IV. W×F-Jensen, W×F-Minhas and W×F-Rao models established in this study simulated navel orange yield well, with R2=0.76~0.90, RMSE=0.030~0.045, AAE=0.023~0.036, EF=0.74~0.88, dIA=0.91~0.96, among which W×F-Minhas model was the best. W×F-Jensen, W×F-Minhas and W×F-Rao models could well simulate the water content of navel orange fruit, showing R2=0.87~0.94, RMSE=0.010~0.011, AAE=0.008~0.009, EF=0.85~0.88, dIA=0.96~0.97, which better simulated the fruit weight and titratable acid content. R2=0.54~0.65, RMSE=0.026~0.050, AAE=0.023~0.040, EF=0.42~0.65, dIA=0.86~0.92. W×F-Minhas和W×F-Rao models had the best performance when simulating soluble sugar and vitamin C, with R2 of 0.46 and 0.51, respectively. In conclusion, W×F-Minhas model was recommended to simulate navel orange yield and fruit quality to realize the efficient development of navel orange with water saving and quality improvement. |
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