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采用施用有机肥、种植紫花苜蓿、微区改土、明沟和暗管排水等改良措施,测试滨海盐碱地土壤含盐量、有机质、有效磷、pH等指标,对比其改良效果。结果表明,5种改良措施下,土壤表层含盐量都大幅下降;暗管排水工程措施下,种植紫花苜蓿时,各土层有机质增幅明显高于其他处理,显著改善了土壤有机质。除了微区改土措施,其他措施均促进土壤有效磷的累积。微区改土技术下,种植紫花苜蓿时,土壤pH值呈下降趋势,而其他处理土壤pH值变化不大,基本维持在8.2左右。
Soil salinity, organic matter, available phosphorus, pH and other indicators of coastal saline-alkali soil were tested by applying organic fertilizer, alfalfa planting, soil remediation with micro-area, drainage ditch with open ditch and underground pipe. The improvement effect was compared. The results showed that under five kinds of improvement measures, the salinity of soil surface decreased significantly. Under alluvial drainage engineering measures, the growth of organic matter in each soil layer was significantly higher than that of other treatments, which significantly improved soil organic matter. In addition to the micro-area soil improvement measures, other measures are to promote the accumulation of soil available phosphorus. Soil micro-area technology, the planting of alfalfa, soil pH value decreased, while other treatments little change in pH, the basic maintained at about 8.2.