文献类型： 外文期刊

作者： Zhang, Tao ¹ ; Wang, Ting ² ; Liu, K. S. ² ; Wang, Lixue ² ; Wang, Kun ³ ; Zhou, Yan;

作者机构： 1.China Agr Univ, Coll Anim Sci & Technol, Dept Grassland Sci, Beijing 100094, Peoples R China

2.China Agr Univ, Coll Anim Sci & Technol, Dept Grassland Sci, Beijing 100094, Peoples R China; Tianjin Agr Univ, Coll Anim Sci & Vet Med, Tianjin 300380, Peoples R China; Tianjin Acad Agr Sci, Inst Anim Husb & Vet, Agr High Tech Demonstrat Zone, Tianjin 300380, Peoples R China

3.China Agr Univ, Coll Anim Sci & Technol, Dept Grassland Sci, Beijing 100094, Peoples R China; Ti

关键词： Soil column;Irrigation;Coastal saline soil;Manure;Soil conditioner;Electrical conductivity

期刊名称：AGRICULTURAL WATER MANAGEMENT （ 影响因子：4.516； 五年影响因子：5.12 ）

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收录情况： SCI

摘要： High salinity and macronutrient deficiencies are two important limitations of coastal saline soils. The present study focused on the changes in electrical conductivity (EC), and the redistribution of water soluble carbon (C), total nitrogen (N), and absorbable phosphorus (P) during the reclamation of coastal saline soil using different amendments. Eight soil treatments were tested: cotton straw powder (J), domestic sewage sludge (W), sewage sludge + cotton residue (J + W), beach sand (S), cotton straw powder + beach sand (J + S), domestic sewage sludge + beach sand (W + S), domestic sewage sludge + cotton residue + beach sand (J + NAT + S), and a control treatment (CK). Triplicate soil samples for each treatment were initially treated once with underground saltwater (with or without bacterial manure). After the first month of incubation, irrigation was conducted weekly. EC measurements in different soil layers showed that sewage sludge was the best amendment for reducing soil EC, while cotton straw powder had no significant effect. Concentrations of N and C increased with soil depth, while the highest P concentration was observed in the uppermost soil. Soil amended with organic matter showed the highest P concentrations, and P availability increased with the application of all amendments except sand, which had no significant effect. The compound treatments had more positive impacts on N availability than did single amendments; however, their effects on P concentration were minimal. The results indicated that sewage sludge was the most effective amendment for reclaiming coastal saline soil and improving the availability of macronutrients. (C) 2015 Elsevier B.V. All rights reserved.