改良剂对冷浸田土壤团聚体稳定性的影响
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国家公益性行业(农业)科研专项(201003059); 国家科技支撑计划项目(2012BAD05B05); 湖北省农业科技创新中心项目(2011-620-001-03)


Effects of amendment on aggregate stability of soil for cold waterlogged paddy field
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    摘要:

    采集冷泉烂泥型和冷浸烂泥型冷浸田土壤,设置不添加任何物质和分别添加白云石粉、生物炭、粉煤灰、聚丙烯酰胺和混合改良剂等6个处理,在持续淹水和干湿交替2种水分管理下进行室内模拟培养试验。测定培养后第30、90、180和360 天土壤团聚体分布及其水稳性。结果表明:在干湿交替条件下,改良剂对冷泉烂泥型和冷浸烂泥型冷浸田土壤团聚体的形成有促进作用,并随着培养时间的延长逐渐增强,达到180 d时基本稳定;在持续淹水条件下,改良剂对2种类型冷浸田土壤团聚体的形成具有短暂促进作用,且不稳定。在几种改良剂中,粉煤灰和混合改良剂(粉煤灰+生物炭+聚丙烯酰胺)对2种类型冷浸田土壤大团聚体形成均表现促进作用。

    Abstract:

    The modifier and water management measures for soil aggregate stability in soil of the cold water logged paddy field were studied to provide scientific basis for screening soil structure modifier.Two types of soil including cold spring and cold mud for cold water logged paddy field in Yangxin county and Xianning county in Hubei Province were used.Under treatment of long-term flooded and dry-wet alternate,model culturing experiments of six treatments including dolomite fines,biochar,fly ash,polyacrylamide,and blending modifier adding or not adding compound amendment in two types of soil separately were conducted.The distribution of aggregate and water stability of soil at the 30th,90th,180th,and 360th day after culturing were measured.The results showed that under dry-wet alternate condition,different modifier promoted the formation of soil aggregate in cold spring and cold mud for cold waterlogged paddy field,and increased with the extension of incubation time.It was basically stable at the 180th day.Under long-term flooded,modifier promoted aggregate formation in the short term.The aggregate was unstable.For different modifier,fly ash and blending modifier by fly ash+polyarcylamide+biochar were better for the formation of big aggregate in cold spring and cold mud waterlogged paddy field.

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张志毅,汤文娟,熊又升,徐祥玉,袁家富,王娟,黄丽.改良剂对冷浸田土壤团聚体稳定性的影响[J].华中农业大学学报,2015,34(4):37-43

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  • 在线发布日期: 2015-06-02
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