【摘要】 以排盐降碱治理一年期的上海东滩滩涂土壤为研究对象,测定分析滩涂不同区域、不同层次的土壤盐分、酸碱度和养分状况。结果表明:东滩土壤盐碱分布表现为表层低于下层、东部高于西部的特点;短期灌水洗盐,对0—40 cm表层土壤盐分下降有明显作用,但会增加40—100 cm土层盐分,而对降低土壤碱性作用较小;短期内洗盐培肥综合农艺措施能明显降低土壤盐分、提高土壤有机质,但对降低土壤碱度、提升土壤水解氮和有效磷等养分作用不明显;因此,东滩土壤整体要达到当地五级耕地地力标准,尚需较长的土壤脱盐降碱、培育熟化过程。更多还原

【Abstract】 The soil salinity,pH and nutrient status in different areas and different levels of the tidal flat were determined and analyzed,taking the east beach of Pudong,Shanghai reduced saline alkali for a year as research object.The result showed that the distribution of soil saline alkali in the east beach was characterized by the surface layer lower than the lower layer and the east higher than the west.Leaching salt for a short time could decrease 0—40 cm surface soil salinity significantly,but increased the salinity of 40—100 cm soil layer,and had little effect on reduce the soil alkalinity.Salt fertilizer comprehensive agronomic measures of leaching salt and fertilization in a short time could significantly reduce soil salinity and improve soil organic matter,but the effect was not obvious on reducing soil alkalinity,improving soil hydrolysis nitrogen and available phosphorus.Therefore,it need a long process of reducing soil saline alkali and cultivation for the whole soil of the east beach reaching the local level five standard farmland.更多还原