单 位：
四川农业大学生命理学院;四川农业大学资源环境学院
关键词：
锌铬复合污染;水稻(OryzasativaL.);不同生育期;土壤酶活性
摘 要：
通过盆栽试验,研究了锌铬复合污染对水稻(Oryza sativaL.)不同生育期土壤酶活性的影响。结果表明,锌铬复合污染对水稻生长有抑制作用,随土壤中锌铬浓度的增加,不同生育期水稻生物量均呈下降的趋势,而根冠比呈一定的升高趋势,差异极显著(P<0.01)。在锌铬污染下,土壤过氧化氢酶活性随土壤中锌铬浓度增大而降低。与对照相比,在水稻分蘖期、孕穗期及灌浆结实期土壤过氧化氢酶活性的最小值分别降低了34.17%、23.02%和4.89%;除在灌浆结实期锌与铬浓度互作间的差异不显著外,其他生育期的锌浓度间、铬浓度间及锌与铬浓度互作间的差异均极显著(P<0.01)。在水稻分蘖期,土壤脲酶活性、转化酶活性随土壤锌铬浓度的增加而降低,但在孕穗期及灌浆结实期则升高,其差异均极显著(P<0.01)。线性回归及偏相关分析表明,在水稻不同生育期,土壤过氧化氢酶活性与土壤中锌、铬浓度均有极显著的线性回归关系,并呈显著或极显著负相关关系,这说明锌铬复合污染对土壤过氧化氢酶活性可能产生协同或加和的抑制效应。土壤脲酶活性在水稻灌浆结实期与土壤中锌浓度有极显著的线性回归关系,偏相关系数为0.7253**;土壤转化酶活性在水稻分蘖期、灌浆结实期与土壤中铬浓度均有极显著的线性回归关系,偏相关系数分别为-0.7426**、0.8056**,这说明锌铬复合污染对土壤脲酶活性及转化酶活性未产生复合效应。
译 名：
EFFECTS OF COMPOUND POLLUTION OF ZINC AND CHROMIUM ON SOIL ENZYME ACTIVITY AT DIFFERENT GROWTH STAGES OF RICE PLANT
作 者：
LIN Li-jin~(1,2) ZHU Xue-mei~1 SHAO Ji-rong~3 JIANG Xiao-jun~1 YANG Yuan-xiang~1(1.College of Resource and Environment,Sichuan Agricultural University,Ya'an,Sichuan 625014;2.Ya'an Soil and Water Conservation and Eco-environment Monitoring Station,Ya'an,Sichuan 625000;3.College of Life Science,Sichuan Agricultural University,Ya'an,Sichuan 625014)
关键词：
compound pollution of Zn and Cr;rice(Oryza sativa L.) plant;different growth stages;soil enzyme activity
摘 要：
The effects of compound pollution of Zn and Cr on soil enzyme activity at different growth stages of rice(Oryza sativa L.) plants were investigated in a soil pot experiment.The results were as follows: With increasing of contents of Zn and Cr in the soil,the biomass of rice plants was reduced at different growth stages,but the ratio of root to shoot(W/W) had an increasing trend,and the differences of them were highly significant(P<0.01).Soil catalase activity had the trend of decline with increasing of contents of Zn and Cr at different growth stages of rice plants.Compared with the control,the minimums of soil catalase activity at tillering stage,booting stage and filling stage of rice plants were decreased 34.17%,23.02% and 4.89%,respectively.Except that Zn×Cr was not significant at filling stage,the differences at others stages were highly significant(P<0.01).Meanwhile,with increasing of contents of Zn and Cr,soil urease activity and invertase activity both had the trend of decline at tillering stage,and increase at booting and filling stage.The differences of soil urease activity and invertase activity were highly significant(P<0.01).Through linear regression analysis and partial correlation analysis,soil catalase activity had highly significant linear regression and significant or highly significant negative correlation with contents of Zn and Cr at different growth stages of rice plants.It indicated that compound pollution of Zn and Cr had Co-inhibiting effect on soil catalase activity.Soil urease activity highly significant linear regression with contents of Zn at filling stage,and partial correlation coefficient was 0.7253~(**).Soil invertase activity had highly significant linear regression with contents of Zn at filling stage,and partial correlation coefficients were-0.7426~(**),0.8056~(**),respectively.And it indicated that compound pollution of Zn and Cr did not have compound effects on soil urease activity and invertase activity.
