| Cite this article: | 臧小平,井 涛,王安邦,等.滴灌施磷对香蕉产量、磷肥利用效率及经济效益的影响[J].灌溉排水学报,0,():-. |
| zangxiaoping,JING Tao,WANG An-bang,et al.滴灌施磷对香蕉产量、磷肥利用效率及经济效益的影响[J].灌溉排水学报,0,():-. |
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| Effects of Phosphorus on Yield, Phosphorus Fertilizer Use Efficiency and Economic Benefit of Banana under Drip Irrigation |
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zangxiaoping1, JING Tao1, WANG An-bang1, WANG Jia-shui1, WANG Wei2, LI Jing-yang1, XU Yi1, MA Wei-hong1, XIE Jiang-hui2
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1.HaiKou Experimental Station, Chinese Academy of Tropical Agriculture Sciences;2.Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agriculture Sciences
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| Abstract: |
| 【Objective】 Low phosphorus (P) use efficiency is a hard issue in China. Water coupling with P fertilizer application is an effective way of improving P resources efficiency as well as decreasing soil P fixation in acidic soil. However, more information is needed about how to improve P ultilization dfficiency in drip irragated fields. The objective this field study was to compare the effect of different P fertilizers on drip-irrigated banana yield and P ultilization. 【Method】The experiment included three treatments: (i) no P fertilizer, (ii) P2O5 226 kg/hm2 of solid monoammonium phosphate (MAP) topdressed (T1), (iii) P2O5 226 kg/hm2 of liquid ammonium polyphosphate (APP) topdressed (T2). 【Result】The yield was 51681 kg/hm2 in the T1 treatment, 13.6% higher than in the CK and 4.5% higher in the T2 treatment. The pseudostem girth, leaf number, leaf length and the amount of P absorption in the P fertilizer treatments were higher than in the CK (P<0.05). The apparent recovery efficiency of the P fertilizer (REP) was 19.3% in the T1 treatment and 17.0% in the T2 treatment. The T1 treatment increased REP by 2.3 percentage points compared with the T1. The physiological efficiency of the P fertilizer (PEP) for T1, T2 was 141.4 kg/kg and 102.5 kg/kg respectively. The T1 treatment increased PEP by 38.9 kg/kg compareed with the T2 treatment. The agronomic efficiency of the P fertilizer (AEP) for T1, T2 was 27.4 kg/kg and 17.5kg/kg . The T1 treatment increased AEP by 9.9 kg/kg compared with the T2 treatment. The partital factor productivity of the P fertilizer (PFPP) for T1, T2 was 228.7 kg/kg and 218.7 kg/kg. The T1 treatment increased PFPP by 10.0 kg/kg compared with the T2 treatment. The net income was 109974 yuan/hm2 in the T1 treatment, 13.7% higher than in the T2 treatment. and promote by intput-output ratio from 1.96:1 to 2.13:1 respectively.【Conclusion】Solid monoammonium phosphate topdressing with drip irrigation siginificantly improves the P nutrition and P fertilizer ultilization efficiency of banana, can be regarded as an efficient P fertilizer application strategy in acidic soil. |
| Key words: drip irrigation; banana; water-soluble phosphate fertilizer; yield; P ultilization efficiency |
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