| 引用本文: | 李 刚,卢 楠,朱代文.蓄水排水条件下盐碱地pH值分布特征及其与土壤养分的关系[J].灌溉排水学报,2018,37(5):75-80. |
| LI Gang,LU Nan,ZHU Daiwen.蓄水排水条件下盐碱地pH值分布特征及其与土壤养分的关系[J].灌溉排水学报,2018,37(5):75-80. |
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| 摘要: |
| 【目的】检验蓄水和排水条件下盐碱地土壤养分的变化和分布特征。【方法】从野外试验田采样，分析了蓄水和排水条件下0～200 cm土层中土壤pH值变化趋势及土壤有机质、全氮、速效钾和有效磷等养分指标的分布规律。【结果】蓄水和排水条件下，土壤pH值均能满足作物生长需求，蓄水试验田土壤pH值小于排水试验田。通过相关分析和逐步回归分析发现，排水试验田pH值与土壤养分线性相关（土壤有机质（r=-0.709**，p<0.01）、土壤有效磷（r=-0.400**，p<0.01）、土壤速效钾（r=0.628**，p<0.01）），蓄水试验田与土壤养分相关性差（p>0.05）。【结论】蓄水试验田可以有效降低土壤耕作层的盐分，加速土壤耕作层脱盐，又能将水分和养分固存于土壤非耕作层，提高了盐碱地治理效果和土壤养分量。 |
| 关键词: 盐碱地； 蓄水； 排水； pH值； 土壤养分 |
| DOI：10.13522/j.cnki.ggps.2017.0181 |
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| Spatiotemporal Distribution of pH and Its Relationship with Nutrients in Saline-alkali Soils During the Stages of Water Storage and Water Drainage |
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LI Gang, LU Nan, ZHU Daiwen
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Shaanxi Provincial Land and Engineering Construction Group Co., Ltd., Xi’an 710075, China; Institute of Land Engineering and Technology, Shaanxi Provincial Land EngineeringConstruction Group Co., Ltd., Xi’an 710075, China; Key Laboratory of Degraded and Unused Land Consolidation Engineering, the Ministry of Land and Resources of China, Xi’an 710075, China; Shaanxi Provincial Land Consolidation Engineering Technology Research Center, Xi’an 710075, China
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| Abstract: |
| 【Objective】?Soil pH affects many biotic and abiotic processes and in this paper we investigated its spatiotemporal distribution and relationship with nutrients in saline and alkaline soil during stages of water storage and water drainage.【Method】 Soil samples were taken from different locations in a field under water storage state and water drainage state; the pH, the content of organic matter, total nitrogen, available potassium and available phosphorus in 0~200 cm soil were analysed. 【Result】 Along with field measurement, the results showed that under both water storage and water drainage stages, the soil pH was in the range that did not have detrimental impact on plan growth. The mean soil pH during water storage period was lower than that during drainage period due to the decrease in oxygen. Correlation analysis and stepwise regression analysis revealed that the pH was linearly correlated with soil nutrients in the drainage period: correlated to soil organic matter with r=-0.709** and p<0.01, correlated to available phosphorus with r=-0.400** and p<0.01, correlated to available potassium with r=0.628** and p<0.01. During water storage period, in contrast, the relationship between pH and the nutrients was insignificant (p>0.05). 【Conclusion】 Water storage could effectively reduce salt content in the tillage layer, accelerating salt leaching, and saving the water and nutrients in subsoil horizon for plants to use. As such, it improved soil quality and efficacy of remediating saline and alkaline soils. |
| Key words: saline-alkali soil; water storage; drainage; pH value; soil nutrients |
