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草业学报  2014 

污泥对高羊茅抗旱性的影响研究

DOI: 10.11686/cyxb20140314, PP. 127-135

Keywords: 污泥,高羊茅,抗旱性,

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Abstract:

污泥中含有腐殖质和生长素等生物活性类物质,会对植物的生长产生影响。本试验在相同氮肥条件下,研究了污泥对高羊茅抗旱性的影响。采用裂区实验设计,主处理包括充分浇水和干旱2个水平;副处理为不同的氮源:对照(75.0mg/kg的氮素由硝酸铵提供)、半污泥(硝酸铵和污泥各提供37.5mg/kg的氮素)、全污泥(75.0mg/kg的氮素由污泥提供)。结果表明,干旱条件下全污泥和半污泥处理能够显著提高高羊茅的坪观质量、叶片相对含水量和叶绿素含量,并降低叶片萎蔫度(P<0.05),表明污泥的施用能够改善高羊茅在干旱下地上部分的生长状况;全污泥处理还能提高叶片的水分利用效率,使高羊茅在50%田间持水量时保持较好的水分代谢(P<0.05);全污泥和半污泥处理能够增加2种水分状况下的根重,提高高羊茅在重度干旱下的根系活力,同时促进干旱条件下高羊茅叶片中脯氨酸的积累(P<0.05),表明污泥中的活性物质能够增强高羊茅的抗旱性。

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