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当前位置: 首页 > 文章 > 咸水滴灌对棉田土壤氨氧化细菌及酶活性的影响 新疆农业科学 2014,51 (11) 2038-2045
Position: Home > Articles > Effects of Saline Water on Soil Ammonia-oxidizing Bacteria and Enzyme Activity in Cotton Field under Drip Irrigation Condition Xinjiang Agricultural Sciences 2014,51 (11) 2038-2045

咸水滴灌对棉田土壤氨氧化细菌及酶活性的影响

作  者：
马丽娟;张文;张楠;张雄;李富春;张慧敏;毛家双;侯振安
单  位：
石河子大学农学院资源与环境科学系
关键词：
咸水滴灌;棉田;氨氧化细菌;潜在硝化势;酶活性
摘  要：
【目的】研究不同盐度灌溉水对棉田土壤氨氧化细菌及酶的影响。【方法】试验设置三个灌溉水盐度(电导率EC):0.35(淡水)、4.61(微咸水)和8.04 d S/m(咸水),分别以FW、BW和SW表示。【结果】咸水、微咸水灌溉显著增加土壤盐度,土壤中铵态氮显著增加,硝态氮显著降低;微咸水和淡水灌溉处理土壤潜在硝化势无显著差异,但是咸水灌溉处理显著降低了土壤潜在硝化势;微咸水处理土壤氨氧化细菌数量与淡水处理差异不显著,但是咸水灌溉处理氨氧化细菌数量较淡水处理降低了59.38%;不同灌溉水盐度对土壤硝酸还原酶和亚硝酸还原酶影响相似,随着灌溉水盐度的增加,土壤硝酸还原酶和亚硝酸还原酶活性显著降低。盐分对羟胺还原酶活性影响不大。【结论】适宜盐度的微咸水滴灌对土壤氨氧化细菌和潜在硝化势无显著影响,但高盐度的咸水灌溉会导致氨氧化细菌数量减少,潜在硝化势和关键酶活性降低,直接影响硝化/反硝化作用。
译  名：
Effects of Saline Water on Soil Ammonia-oxidizing Bacteria and Enzyme Activity in Cotton Field under Drip Irrigation Condition
作  者：
MA Li-juan;ZHANG Wen;ZHANG Nan;ZHANG Xiong;LI Fu-chun;ZHANG Hui-min;MAO Jia-shuang;HOU Zhen-an;Department of Resources and Environmental Science,College of Agronomy,Shihezi University;
关键词：
drip irrigation with saline water;;cotton feild ammonia-oxidizing bacteria;;potential nitrification rate;;soil enzyme activity
摘  要：
【Objective】A field experiment was conducted to investigate the effect saline water on soil ammonia- oxidizing bacteria numbers and potential nitrification rate under drip irrigation conditions. Activities of nitrite reductase,nitrate reductase and hydroxylamine reductase in soil were also evaluated in this study.【Method】Three irrigation water salinity levels were designed as 0. 35,4. 61 and 8. 04 d S /m,representing fresh water( FW),brackish water( BW),and saline water( SW),respectively. 【Result】The result showed that soil salinity and NH4+- N increased significantly with water salinity,while NO3-- N decreased. Potential nitrification rate under SW treatment was significantly lower than that under FW treatments and BW treatments,but there were no significant difference between the BW and FW treatments. Ammonia- oxidizing bacteria numbers under the SW treatment was 59. 38% lower than that under the FW treatments,but there were no significant difference between the BW and FW treatments. The soil nitrate reductase and nitrite reductase activities were significantly affected by the water salinity which was decreased significantly with salinity. Hydroxylamine reductase activity was not significantly affected by the water salinity. 【Conclusion】Those resultssuggested that the ammonia- oxidizing bacteria numbers and potential nitrification rate were not affected by brackish water with an optimum salinity level. Saline water irrigation could cause ammonia- oxidizing bacteria numbers,potential nitrification rate and enzyme activities to decrease significantly. Nitrification and denitrification were affected directly by drip irrigation with saline water.

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