针对新成陆的上海临港新城滨海盐渍土进行硅酸盐细菌接种处理,研究对高羊茅生长和表层种植土淋溶脱盐的影响。结果表明:滨海盐渍土接种巨大芽孢杆菌和胶质芽孢杆菌,能够提高高羊茅根系伸长、株高、生物量积累和相对含水量,并将根冠比均值分别提高了3.66%和3.21%; 在相同渗滤条件下收集1.80 L滤液,接种硅酸盐细菌的试验组土壤渗滤性能比未接种试验组提高了3.70～6.60 min,比无植物种植试验组提高了23.70～26.60 min,同时有利于高羊茅根系区域Ca2+、K+浓度的提升,Na+的向下迁移,使得表层土电导率(EC)值持续降低,并且没有出现短期内淋溶脱盐过程中pH升高的现象。
Abstract
A greenhouse experiment was carried out with the objective of evaluating the effects of peat inoculated with two types of silicate bacteria, Bacillus megaterium and B.mucilaginosus, in the amendment of coastal saline soil from Lingang, Shanghai. The result showed that coastal soils inoculated with B. megaterium or B. mucilaginosus was more efficient than non-inoculated treatments in Festuca arundinacea growth promoting of root length, shoot height, biomass and relative water content of tissue, the mean ratio of root to shoot was raised by 3.66% and 3.21% respectively. The leachate volume of 1.80 L were collected at 130% water-holding capacity of the soil, the inoculated cropped-treatments took less 3.70-6.60 min than non-inoculated cropped-treatment, also took less 23.70-26.60 min than control treatment. In comparison with non-inoculated treatment, the inoculated treatments had significantly higher concentrations of Ca2+ and K+, that subsequently removed a greater amount of Na+ from topsoil. The inoculated treatments had lower mean value of EC in topsoil, and the desalting process happened in inoculated treatments would not cause pH increase.
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基金
收稿日期:2011-12-06 修回日期:2012-01-11 基金项目:“十一五”国家科技支撑计划(2008BAJ10B04) 第一作者:朱义,工程师。E-mail:zhuyi0816@163.com。引文格式:朱义. 硅酸盐细菌对滨海盐渍土高羊茅生长及表土淋溶脱盐的影响[J]. 南京林业大学学报:自然科学版,2012,36(2):106-110.
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