烟气脱硫石膏对崇明滨海盐碱地理化性质及旱稻生长的影响

发布时间：2018-05-23 10:30

  本文选题：烟气脱硫石膏 + 滨海盐碱地　； 参考：《西南农业学报》2016年06期

【摘要】：利用烟气脱硫石膏改良滨海滩涂盐碱地,可以加快盐碱土壤的脱盐过程,改善农作物的生长环境。选择上海崇明东滩的滩涂盐碱地,采用已获得的技术参数和烟气脱硫石膏配比(60 t/hm~2),通过现场试验研究了烟气脱硫石膏对滨海滩涂盐碱地土壤理化性质和旱稻生长及产量的影响。结果表明,在滩涂盐碱地施用烟气脱硫石膏改良盐碱土壤并种植旱稻,土壤中的盐分组成发生了明显变化,土壤pH、交换性Na~+及土壤碱化度(ESP)显著降低。旱稻收获后改良土壤中的有机质、总氮、速效钾等营养物质含量均较未改良土壤低,土壤速效磷含量则降低了近7倍,从而降低了径流中可溶性磷进入水体的风险。同时,改良土种植的旱稻主要根系指标、地上部分株高以及地下、地上生物量均显著增加(P0.05),旱稻的主要产量指标及总产量也较未改良区域显著性增加。因此,施用烟气脱硫石膏能够显著改良滨海滩涂盐碱地的理化性质,促进旱稻的根系和植株生长,从而提高旱稻的产量,并改善农业生态环境。
[Abstract]:Using flue gas desulphurization gypsum to improve saline-alkali land in coastal beach can accelerate the desalination process of saline-alkali soil and improve the growing environment of crops. The effects of flue gas desulphurization gypsum on soil physical and chemical properties, upland rice growth and yield of saline-alkali land in Dongtan, Chongming, Shanghai, were studied by using the obtained technical parameters and flue gas desulfurization gypsum ratio of 60 t / h ~ (-2) h ~ (-1). The results showed that applying flue gas desulphurization gypsum to improve saline-alkali soil and planting upland rice, the salt composition in the soil changed obviously, and the pH, exchangeable Na ~ and soil alkalinity ESPs decreased significantly. The contents of organic matter, total nitrogen, available potassium and other nutrients in the improved soil after harvest were lower than those in the unimproved soil, and the available phosphorus content in the soil decreased by nearly 7 times, thus reducing the risk of soluble phosphorus entering the water body in runoff. At the same time, the main root system index, plant height and underground biomass of upland rice planted in improved soil increased significantly (P 0.05), and the main yield index and total yield of upland rice were significantly higher than that of unimproved area. Therefore, the application of flue gas desulphurization gypsum can significantly improve the physical and chemical properties of saline-alkali land in coastal beach, promote the root system and plant growth of upland rice, thus increase the yield of upland rice and improve the agricultural ecological environment.
【作者单位】： 华东师范大学河口海岸学国家重点实验室;上海应用技术学院生态技术与工程学院;上海恒德荣昌农村环境治理有限公司;
【基金】：国家环保公益性行业科研专项(201109023-2) 上海市循环农业发展关键技术集成示范[沪农科推字(2012)第2-1号] 上海市科委重大项目-上海天文馆工程建设关键技术研究与应用(15dz1207900)
【分类号】：S511.6;S156.4
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本文编号：1924365