滨海盐土水、旱生境下田菁生长及其对盐土肥力的影响
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AMELIORATION OF MARINE SALINE SOIL BY MIXED CULTIVATION OF SESBANIA GROWING IN WATERLOGGED SOILS WITH FISH CULTURE AND SINGLE SESBANIA CULTURE
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    摘要:

    蓄淡养鱼改良滨海强度盐渍化土壤[1]和种植田菁改良盐土已被广泛报道.为把有效的改良途径组装为一体,产生生态叠加效应,从1991年开始,在江苏滨海中度盐渍化土壤进行田菁水植养鱼改土试验研究.结果表明:1.在中度盐渍化土壤上田菁水植养鱼复合处理其盛花期水植田菁很鲜重是旱作的10倍,根瘤鲜重是旱作田菁的15倍以上;田菁籽产量是旱境单作田菁的1.5倍以上.2.田菁水植养鱼复合处理土壤脱盐效果明显优于蓄淡养鱼,而后者的脱盐效果又明显地高于田菁旱境单作,0~20cm脱盐效果为:田菁水植养鱼处理>田菁旱作处理>蓄淡养鱼处理;而0~100cm土层表现为:田菁水植养鱼处理>围田蓄淡处理>田菁旱作处理,反映脱盐趋势的SAR、Na+/Ca2+亦呈上述同样的表现.3.土壤养分不同处理间变化亦十分明显:田菁水植养鱼复合处理0~10cm土层全氮及碱解氮含量几乎为田菁旱境单作与营淡养鱼的含量之和,有机碳含量亦呈同样趋势;土壤速效磷、缓效磷的增幅均为田菁水植养鱼处理>田菁旱作处理>蓄淡养鱼处理.

    Abstract:

    Amelioration experiments of marine medium-saline soil by mixed cultivation of sesbania growing in waterlogged soils with fish culture(MCSWFC) was carried out in soils improved with single fish culture(SFC) previously,with cultivating sesbania in upland as a control.Results obtained were as follows:1.Sesbania plants grew much better in waterlogged soils with fish culture than in upland.The fresh weight of lateral roots,root nodules and seeds yield of sesbania growing in waterlogged soils was 10 times,15 times and 1.5 times of that in upland respectively.2.Efficiency of salt leaching in soil depth of 0-20 cm in the three treatments was as following order:MCSWFC>cultivating sesbania in upland(CSU) SFC,while it in soil depth of 0~100 cm was MCSWFC>SFC>CSU and there were same tendencies for SAR and Na+/Ca2+ ratio.3.Total soil nitrogen and alkali-hydrolyzable nitrogen in soil depth of 0-10 cm in MCSWFC was almost the sum of those in the treatments of CSU and SFC and it was also taste for soil organic carbon.And the increase rates of soil available phosphorus and slowly available phosphorus were MCSWFC>CSU>SFC.

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刘兆普,沈其荣,邓力群,陈效民,罗以筛,孙怀顺,任中言.滨海盐土水、旱生境下田菁生长及其对盐土肥力的影响[J].土壤学报,1999,36(2):267-275. DOI:10.11766/trxb199801120215 Liu Zhao-pu, Shen Qi-rong, Deng Li-qun, Chen Xiao-min, Luo Yi-shai, Sun Huai-shun, Ren Zhong-yan. AMELIORATION OF MARINE SALINE SOIL BY MIXED CULTIVATION OF SESBANIA GROWING IN WATERLOGGED SOILS WITH FISH CULTURE AND SINGLE SESBANIA CULTURE[J]. Acta Pedologica Sinica,1999,36(2):267-275.

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  • 收稿日期:1998-01-12
  • 最后修改日期:1998-06-21
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  • 在线发布日期: 2013-02-25
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