Haikou Experimental Station, Chinese Academy of Tropical Agricultural Sciences (CATAS), Haikou, China.
Soils, Water and Environment Research Institute, Agricultural Research Center, Giza, Egypt.
Sci Rep. 2020 Feb 17;10(1):2736. doi: 10.1038/s41598-020-59650-8.
Soil degradation due to global warming, water scarcity and diminishing natural resources negatively impacts food security. Soil fertility deterioration, particularly phosphorus (P) deficiency, remains a challenge in the arid and semi-arid regions. In this study, field experiments were conducted in different geographical locations to investigate the effects of organic amendments coupled with P fertilization and irrigation on soil physical-chemical properties, and the growth, yield and quality of wheat. Application of P fertilizers combined with organic amendments mitigated soil salinity, increased organic matter content, available water, hydraulic conductivity and available macronutrients, but decreased soil bulk density. Application of organic amendments slightly increased total Cd, Ni and Pb in soil, but Cd and Ni concentration was below allowable limits whilst Pb reached a hazardous level. Soil P fractions were significantly increased with the combined application of mineral P and organic amendments irrespective of salinity and irrigation. Crop growth yield and quality of wheat improved significantly in response to the integrated application of mineral P and organic amendments. In conclusion, the combination of mineral P sources with organic amendments could be successfully used as a cost-effective management practice to enhance soil fertility and crop production in the arid and semi-arid regions stressed with water scarcity and natural resource constraints.
由于全球变暖、水资源短缺和自然资源减少，土壤退化对粮食安全产生了负面影响。土壤肥力退化，特别是磷（P）缺乏，仍然是干旱和半干旱地区面临的挑战。本研究在不同地理位置进行田间试验，研究了有机改良剂与 P 施肥和灌溉相结合对土壤理化性质以及小麦生长、产量和品质的影响。P 肥与有机改良剂的施用减轻了土壤盐渍化，增加了有机质含量、有效水、水力传导率和有效大量养分，但降低了土壤容重。有机改良剂的施用略微增加了土壤中总 Cd、Ni 和 Pb 的含量，但 Cd 和 Ni 的浓度在允许范围内，而 Pb 则达到了危险水平。无论盐分和灌溉如何，矿物 P 和有机改良剂的联合施用都显著增加了土壤 P 组分。作物生长和小麦产量和品质显著提高，对矿物 P 和有机改良剂的综合应用有响应。总之，将矿物 P 源与有机改良剂结合使用，可以作为一种具有成本效益的管理措施，在面临水资源短缺和自然资源限制的干旱和半干旱地区，提高土壤肥力和作物产量。
