为了研究施氮与刈割对盐角草盐分累积规律及其生长的影响.本试验在大田种植情况下,研究刈割处理和4个氮水平(0,150,300,450 kg/hm2)对盐角草的生长、钾钠钙镁含量及其累积量的影响.结果表明,施氮能够增加盐角草生物量,提高钾钠钙镁的累积量,但施氮对盐角草体内盐分离子含量的影响与离子种类、生育时期及刈割有关.随施氮量递增,盐角草体内4种阳离子浓度变化趋势发生转变,但方向与拐点存在差异.刈割能够增加鲜物质量,减少干物质累积量.刈割能够提高盐角草体内钾离子浓度及其累积量；钠钙变化与施氮量有关；镁的浓度主要与刈割时期相关.随施氮量增加,刈割处理中钠含量呈先降低后升高的趋势,拐点在150～300 kg/hm2;未刈割相反.刈割盐角草体内钙含量随着施氮量增加呈先增加后降低的趋势,拐点出现在300 kg/hm2处；未刈割反之,但拐点出现在150 kg/hm2处.花果期的镁浓度随着施氮量增加而降低；收获期镁浓度随着施氮量增加呈逻辑斯谛增长模式.本试验条件下,施氮刈割能够促进盐角草生长及提高盐渍土的生物改良效果.%The effects of fertilization and clipping on salt accumulation and growth of Salicornia europaea,were studied in field experiments using clipping and four nitrogen levels (0,150,300,450 kg/ha).Growth,contents and accumulative amounts of K,Na,Ca,Mg of S.europaea were measured.N fertilizer application to S.europaea increased biomass and salt accumulation but the concentration trends of K,Na,Ca and Mg in terms of direction and inflection point were different.The fresh weights were higher with clipping,but the dry weights were less.Clipping led to increased contents and accumulative amounts of K,but not of Na and Ca while Mg differed depending on the timing of clipping.Na and Ca content of S.europaea handling in cutting first increased,but then decreased with nitrogen supply,The results were the opposite with no cutting.Magnesium decreased with N fertilization application during blooming and fruit stages,but increased during the maturation stage.Under the conditions of this experiment,fertilization and clipping stimulated S.europaea growth,and strengthened the effectiveness of bioremediation of saline soil.
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