【摘要】 为探究不同有机肥施用量对滨海盐渍土盐分表聚性及物理性状的影响,以东营市利津县滨海盐渍土为研究对象,通过大田试验,分析0、15、30、45、75 t/hm~2有机肥施用量对盐渍土盐分表聚量、土壤蒸发速率、容重、孔隙度、含水率等指标的影响及其之间的相关性。结果表明:在重度盐渍化土和盐土条件下,有机肥施用量分别为45 t/hm~2和75 t/hm~2时对土壤盐分表聚量降低最显著,降低幅度分别为5.69%和13.02%;各有机肥处理较不施有机肥(对照)土壤蒸发速率降低范围分别为12.20%～31.05%和12.43%～30.32%。在重度盐渍化土中,有机肥施用量45 t/hm~2对土壤物理性状改善作用最显著,土壤容重降低9.85%,土壤孔隙度和含水率分别提高16.06%和14.44%;在盐土中,有机肥施用量75 t/hm~2对土壤物理性状改善作用最显著,土壤容重降低31.00%,土壤孔隙度和含水率分别提高30.63%和33.03%;土壤容重和盐分表聚量之间呈显著正相关,土壤孔隙度与盐分表聚量之间呈极显著负相关。更多还原

【Abstract】 The coastal salinized soil in Lijin County of Dongying City was taken as the research object to investigate the effect of different organic fertilizer dosages(0, 15, 30, 45 t/hm~2 and 75 t/hm~2) on salt surface aggregation and physical properties by analyzing the salt surface accumulation, soil evaporation rate, bulk density, porosity and moisture content and their correlation. The results showed that under the conditions of heavy salinized soil and salty soil, the soil salt surface accumulation decreased the most significantly when the application dosage of organic fertilizer was 45 t/hm~2 and 75 t/hm~2, and the reduction ranges were 5.69% and 13.02%;the evaporation rate of soil treated with organic fertilizer decreased by 12.20%～31.05% and 12.43%～30.32% compared with those without organic fertilizer application. In heavy salinized soil, the organic fertilizer application dosage of 45 t/hm~2 had the most significant effect on the improvement of soil physical properties, the soil bulk density decreased by 9.85%, and the soil porosity and moisture content increased by 16.06% and 14.44%. In salty soil, when the application dosage of organic fertilizer was 75 t/hm~2, the improvement of soil physical properties was the most significant, the soil bulk density decreased by 31.00%, and the soil porosity and moisture content increased by 30.63% and 33.03%. There was a significant positive correlation between soil bulk density and salt surface accumulation, and a significant negative correlation between soil porosity and salt surface accumulation.更多还原