土壤酶活性对微咸水与再生水混合滴灌的响应与评估  

Response and evaluation of soil enzyme activity to mixed drip irrigation with brackish water and reclaimed water

作　　者：王宇 刘春成[2,3,4] 李仁杰 曾智 崔丙健 张凤华 闫明丽 胡超 马天[2,3] WANG Yu;LIU Chuncheng;LI Renjie;ZENG Zhi;CUI Bingjian;ZHANG Fenghua;YAN Mingli;HU Chao;MA Tian(Xinxiang Hydrological and Water Resources Survey Bureau of Henan Province,Xinxiang,Henan 453000,China;Institute of Farmland Irrigation of CAAS,Xinxiang,Henan 453002,China;Graduate School of Chinese Academy of Agricultural Sciences,Beijing 100081,China;Agriculture Water and Soil Environmental Field Science Research Station of Xinxiang City of Henan Pro-vince/Key laboratory of High-efficient and Safe Utilization of Agriculture Water Resources of CAAS,Xinxiang,Henan 453000,China;China Railway Water Conservancy&Hydropower Planning and Design Group Co.,Ltd.,Nanchang,Jiangxi 330000,China)

机构地区：[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

出　　处：《排灌机械工程学报》2023年第3期313-318,共6页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家重点研发计划项目(2017YFC0403503-2,2017YFC0403302-1);河南省自然科学基金资助项目(202300410552);河南省重点研发与推广专项(202102110264);中央级科研院所基本科研业务费专项(FIRI202001-02)。

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、水溶性离子以及土壤酶活性的影响,并利用第2代生物综合响应(IBR_(v2))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IBR_(v2)指数法,与CK相比较,处理T1引起的酶活性偏差最低,IBR_(v2)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IBR_(v2),并综合考虑土壤酶活性指标以及再生水资源量大、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.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(IBR_(v2))index method.The results indicate 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 are higher.(2)The effects of mixed irrigation using brackish water-reclaimed water on soil enzyme activities are different.The soil alkaline phosphatase and urease activities under mixed irrigation are higher than that of brackish water irrigation and reclaimed water irrigation,and the soil sucrase activity is slightly lower than that of reclaimed water irrigation,but higher than that of brackish water irrigation.(3)Based on the IBR_(v2)index method,compared with CK,the deviation of enzyme activity caused by T1 treatment is the lowest,and the IBR_(v2)value is 2.12,followed by T2 treatment,the IBR_(v2)value is 2.42,and the highest deviation appeares in T3 treatment with the IBR_(v2)of 2.92.The activities of S-AKP/ALP,S-SC and S-UE are inhibited in T3 treatment.T2 treatment could induce the activity of S-AKP/ALP and S-UE,but slightly inhibite S-SC activity.T1 treatment induce the activity of S-AKP/ALP and S-SC,but slightly inhibite the activity of S-UE to a certain extent.Therefore,based on IBR_(v2),and considering soil enzym

关 键 词：微咸水 再生水 混合灌溉 土壤酶活性 IBR_(v2) 

分 类 号：S273[农业科学—农业水土工程] S154.3[农业科学—农业工程]