| 陈玙,杨树青,娄帅,陈希.微咸水灌溉下外源NaCl浓度对枸杞根层土壤环境因子及产量的影响[J].干旱地区农业研究,2025,(3):80~89 |
| 微咸水灌溉下外源NaCl浓度对枸杞根层土壤环境因子及产量的影响 |
| Effects of exogenous NaCl concentration on soil environmental factors in the root layer and yield of Lycium barbarum under brackish water irrigation |
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| DOI：10.7606/j.issn.1000-7601.2025.03.09 |
| 中文关键词: 枸杞 微咸水灌溉 外源NaCl 土壤环境 |
| 英文关键词:Lycium barbarum brackish water irrigation exogenous NaCl soil environment |
| 基金项目:国家自然科学基金（52069023，52179037） |
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| 摘要点击次数: 58 |
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| 中文摘要: |
| 为探究微咸水灌溉下典型外源盐NaCl浓度对枸杞产量和土壤环境因子的影响，寻求适宜于不同微咸水水质区的灌溉水盐浓度，于2022年4—10月在河套灌区下游开展田间试验，设置4种不同NaCl浓度（0.1、0.5、2.0、4.0 g·L-1），以清水作为对照（CK）对0~100 cm土层土壤水盐、pH、钠吸附比（SAR）变化及枸杞生长特性进行分析。结果表明：微咸水灌溉下，掺加不同外源NaCl浓度均可提高土壤含水率，以浓度为4.0 g·L-1灌溉水盐浓度处理的土壤含水率明显高于其他处理；土壤电导率随灌溉水盐浓度的增加呈线性增加趋势，在0.1 g·L-1处理下，30~40 cm土层含盐量最少；在枸杞生育时期内，土壤pH随灌溉水盐浓度升高而升高，低浓度处理下（<0.5 g·L-1）与CK处理无显著差异，4.0 g·L-1浓度时，pH值最高，较CK增加3.27%；在0~40 cm土层，掺加浓度为0.1 g·L-1处理的SAR最小，较0.5、2.0、4.0 g·L-1处理分别减少9.90%、7.53%、20.38%；NaCl浓度大于0.5 g·L-1时，枸杞新枝、地径和冠幅生长速率受到抑制；NaCl浓度为0.1 g·L-1时的枸杞产量较CK处理下降最少，为26.49%。综上，在Cl-Na型水质中掺加NaCl浓度小于0.5 g·L-1的微咸水灌溉可实现节约河套灌区淡水资源、预防土壤次生盐渍化的目标，研究结果可为河套灌区类似水质区微咸水的安全利用提供技术支撑与理论依据。 |
| 英文摘要: |
| To explore the effects of typical exogenous salt (NaCl) concentration on the yield of Lycium barbarum and soil environmental factors under brackish water irrigation, and to identify the optimal salt concentration for irrigation in different brackish water quality areas, a field experiment was conducted downstream of the Hetao Irrigation District from April to October 2022. Four NaCl concentration treatments (0.1, 0.5, 2.0, 4.0 g·L-1) along with a control (CK, clean water) treatment were established to analyze changes in soil water salinity, pH, and sodium adsorption ratio (SAR) in the soil layers from 0 to 100 cm, as well as the growth characteristics of Lycium barbarum. The results showed that under brackish water irrigation, the soil water moisture content was increased by adding different exogenous NaCl concentrations, and the soil moisture water content was significantly higher in the treatment with a concentration of 4.0 g·L-1 irrigation water salt concentration than the other treatments. Soil electrical conductivity increased linearly with the increase of the irrigation salt concentration, under 0.1 g·L-1 treatment, the salt content of 30~40 cm soil layer was the least. During the growth period of Lycium barbarum, soil pH increased with the increase of salt concentration of irrigation water, and there was no significant difference between CK and low NaCl concentration treatment (<0.5 g·L-1). At 4.0 g·L-1, soil pH was the highest, which increased by 3.27% compared with CK. In 0~40 cm soil layer, the SAR of 0.1 g·L-1 treatment was the smallest, which decreased by 9.90%，7.53% and 20.38% compared with 0.5，2.0 and 4.0 g·L-1, respectively. When NaCl concentration was greater than 0.5 g·L-1, the growth rate of new branches, ground diameter and crown width was inhibited. When NaCl concentration was 0.1 g·L-1, the yield of Lycium barbarum decreased by 26.49% compared with CK treatment. In conclusion, adding brackish water with a NaCl concentration of less than 0.5 g·L-1 to Cl-Na water quality can help conserve freshwater resources and prevent secondary soil salinization in the Hetao irrigation area. The research findings provide valuable technical support and a theoretical foundation for the safe use of brackish water in areas with similar water quality conditions in the Hetao irrigation area. |
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