| Cite this article: | 雷菲.灌溉施肥模式对海南辣椒产量、土壤养分及水肥利用的影响[J].灌溉排水学报,2022,():-. |
| leifei.灌溉施肥模式对海南辣椒产量、土壤养分及水肥利用的影响[J].灌溉排水学报,2022,():-. |
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| Effects of Irrigation and Fertilization Modes on Yield, Water - Fertilizer Utilization and Soil Nutrient of Pepper in Hainan |
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leifei
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Agricultural Environment and Soil Research Institute of Hainan Academy of Agricultural Sciences
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| Abstract: |
| 【Background】Hainan is thought to be an important pepper production base for South-to-North vegetable transfer in China, while the pepper planters in Hainan still follows the traditional furrow fertigation method, which results in serious waste of water and fertilizer, leaching of soil nutrient, and environment pollution.【Objective】The objective of this paper is to explore the suitable irrigation of fertilization mode with high yield and high efficiency of pepper in Hainan. 【Method】The plot experiments were conducted to study the yield, quality, leaf photosynthesis, root growth, nutrient accumulation, soil nutrient distribution, and water and fertilizer utilization of pepper in four different irrigation and fertilization modes: furrow irrigation with no fertilizer (CK), furrow irrigation with conventional fertilization mode (F1, N 470.70 kg/hm2 + P2O5 511.22 kg/hm2 + K2O 526.39 kg/hm2), furrow irrigation with reduced fertilization mode (F2, N 376.55 kg/hm2 + P2O5 314.83 kg/hm2 + K2O 526.39 kg/hm2), micro-spray underneath the mulching film with reduced fertilization mode (F3, N 376.55 kg/hm2 + P2O5 314.83 kg/hm2 + K2O 526.39 kg/hm2)【Result】(1) Under the condition of high background values of soil nitrogen and phosphorus, compared with F1, there were no significant differences in yield, quality, root growth, leaf photosynthesis and plant nitrogen, phosphorus and potassium accumulation in F2 treatment. (2) The yield, leaf transpiration rate, root length, root surface area, root volume, nitrogen accumulation, phosphorus accumulation and potassium accumulation of F3 treatment increased by 8.03%, 16.91%, 60.69%, 43.00%, 40.37%, 19.30%, 14.19% and 14.61% respectively compared with F2 treatment, while the fruit quality, leaf net photosynthesis rate, stomata conductance and intercellular CO2 concentration showed no significant differences. (3) Compared with F1, F2 treatment reduced the contents of total nitrogen, ammonium nitrogen, total phosphorus and available phosphorus in 0~20 cm and 20~40 cm soil layers after harvest, reduced the apparent surplus of nitrogen and phosphorus, and improved the partial factor productivity of nitrogen and phosphorus fertilizer. (4) Compared with F2, F3 treatment increased the contents of total nitrogen, nitrate nitrogen, ammonium nitrogen, total phosphorus and available phosphorus in 0~20 cm soil layer, reduced the apparent surplus of nitrogen and phosphorus, and improved the production rate of irrigation water.【Conclusion】under the condition of this study, micro-spray underneath the mulching film with reduced fertilization mode (F3) can improve the yield, water and fertilizer use efficiency of pepper. |
| Key words: pepper; irrigation and fertilization mode; yield; soil nutrient; water and fertilizer utilization |
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