Effect of Sphingomonas sanxanigenens Biological Soil Crusts on Soil Moisture and Nutrient Holding Capacity

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Title:: Effect of Sphingomonas sanxanigenens Biological Soil Crusts on Soil Moisture and Nutrient Holding Capacity

Author(s):: ZHOU Mingming1; REN Mengnan1; LI Xiaoyan2; SHEN Yang1; HUANG Haidong1; (1.College of Agronomy and Resources & Environment，Tianjin Agricultural University，Tianjin 300384;2.College of Food Science and Biotechnology，Tianjin Agricultural University，Tianjin 300384)

Keywords:: biological soil crusts; viscous polysaccharide; water retention; fertilizer retention

Abstract:: Taking Sphingomonas sanxanigenens which can secrete a large number of sticky polysaccharide as test strain，sand，loam and clay as test materials，the effect of bacteria agent on the fertilizer and water holding capacity of soil with different textures were studied by using shake flask fermentation for high viscosity bacteria agent to spray the diluted on the soil surface and form a layer of biological crust.The results showed that after the formation of Sphingomonas sanxanigenens biological soil crusts，water retention power in loam,sand and clay increased by 67.6%,27.3% and 20.7%，respectively，compared with the control.After leaching experiment，ammonium nitrogen leaching loss reduced 83.3%，phosphate fertilizer leaching loss reduced 61.1%，potassic fertilizer leaching loss reduced 75.0% in clay with biological crusts；nutrient retention ability of biological soil crusts in loam and sand also increased significantly.

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Last Update: 2016-12-07