| 土壤酶活性对微咸水与再生水混合滴灌的响应与评估 |
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| 引用本文： | 王宇,刘春成-,李仁杰,曾智,崔丙健,张凤华,闫明丽,胡超,马天.土壤酶活性对微咸水与再生水混合滴灌的响应与评估[J].排灌机械工程学报,2023,41(3):313-318. |
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| 作者姓名： | 王宇 刘春成- 李仁杰 曾智 崔丙健 张凤华 闫明丽 胡超 马天 |
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| 作者单位： | 1. 河南省新乡水文水资源勘测局, 河南 新乡 453000;2.中国农业科学院农田灌溉研究所, 河南 新乡 453002;3. 中国农业科学院研究生院, 北京 100081;4. 中国农业科学院新乡农业水土环境野外科学观测试验站/农业水资源高效安全利用重点开放实验室, 河南 新乡 453000;5. 中铁水利水电规划设计集团有限公司, 江西 南昌 330000 |
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| 摘 要： | 为了探讨淡水资源不足地区微咸水与再生水的合理利用方式,通过盆栽试验,以当地地下水灌溉为对照(CK),研究了3种不同比例微咸水与再生水混合灌溉(再生水灌溉T1,5 g/L微咸水与再生水等量混合灌溉T2,5 g/L微咸水灌溉T3)对土壤水盐、水溶性离子离子以及土壤酶活性的影响,并利用第2代生物综合响应(IBRv2)指数法评估土壤酶活性对微咸水与再生水混合灌溉效应的响应.结果表明,(1)随着微咸水与再生水混合液中微咸水占比提升,土壤含水率和含盐量越高.(2)微咸水-再生水混合灌溉处理对土壤酶活性的影响不同,土壤碱性磷酸酶和脲酶活性较微咸水和再生水灌溉处理均有所提升,土壤蔗糖酶活性较再生水灌溉略低,但却高于微咸水灌溉.(3)基于IBRv2指数法,与CK相比较,处理T1引起的酶活性偏差最低,IBRv2值为2.12;处理T2次之,值为2.42;处理T3最高,值为2.92.处理T3中S-AKP/ALP,S-SC,S-UE活性均受到抑制;处理T2对S-AKP/ALP,S-UE活性具有诱导作用,但对S-SC略有抑制;处理T1对S-AKP/ALP,S-SC活性具有诱导作用,但对S-UE活性具有一定的抑制.因此,基于IBRv2,并综合考虑土壤酶活性指标以及再生水资源量量大、日排放量小等自身局限性,在干旱缺水地区,可以考虑用再生水与微咸水配合使用.
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| 关 键 词： | 微咸水 再生水 混合灌溉 土壤酶活性 IBRv2 |
| 收稿时间： | 2021-06-11 |
Response and evaluation of soil enzyme activity to drip irrigation with brackish water and reclaimed water |
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| WANG Yu,LIU Chuncheng-,LI Renjie,ZENG Zhi,CUI Bingjian,ZHANG Fenghua,YAN Mingli,HU Chao,MA Tian.Response and evaluation of soil enzyme activity to drip irrigation with brackish water and reclaimed water[J].Journal of Drainage and Irrigation Machinery Engineering,2023,41(3):313-318. |
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| Authors: | WANG Yu LIU Chuncheng- LI Renjie ZENG Zhi CUI Bingjian ZHANG Fenghua YAN Mingli HU Chao MA Tian |
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| Abstract: | In order to explore the reasonable utilization of brackish water and reclaimed water in areas with insufficient freshwater resources, three treatments were set, including reclaimed water irrigation(T1), mixed irrigation of 1∶1 with brackish water-reclaimed water(T2)and brackish water irrigation(T3), and local groundwater irrigation(CK2)was taken as the control, of which the saline degree of brackish water was 5 g/L. Based on the pot experiments, soil water content, soil salt content, soluble ions contents and soil enzyme activities including soil sucrase(S-SC), soil alkaline phosphatase(S-AKP/ALP), soil urease(S-UE)were measured. The responses of soil enzyme activities to the effect of brackish water and reclaimed water mixed irrigation was evaluated by the second generation integra-ted biological response(IBRv2)index method. The results indicated that: (1) with the increase of the proportion of brackish water in the mixture of brackish water and reclaimed water, the soil moisture content and salt content were higher. (2)The effects of mixed irrigation using brackish water-reclaimed water on soil enzyme activities were different. The soil alkaline phosphatase and urease activities under mixed irrigation were higher than brackish water irrigation and reclaimed water irrigation, and the soil sucrase activity was slightly lower than that of reclaimed water irrigation, but higher than that of brackish water irrigation. (3)Based on the IBRv2 index method, compared with CK, the deviation of enzyme activity caused by T1 treatment was the lowest, and the IBRv2 value was 2.12, followed by T2 treatment, the IBRv2 value was 2.42, and the highest deviation appeared in T3 treatment with the IBRv2 of 2.92. The activities of S-AKP/ALP, S-SC and S-UE were inhibited in T3 treatment. T2 treatment could induced the activity of S-AKP/ALP and S-UE, but slightly inhibited S-SC activity. T1 treatment induced the activity of S-AKP/ALP and S-SC, but slightly inhibited the activity of S-UE to a certain extent. Therefore, based on IBRv2, and considering soil enzyme activity and the limitations of reclaimed water resources such as large amount of reclaimed water resources and small daily discharge, reclaimed water and brackish water, it can be considered to used reclaimed water together with brackish water in arid and water shortage areas. |
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| Keywords: | brackish water reclaimed water mixed irrigation soil enzyme activity IBRv2 |
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