| Cite this article: | 韩瑞,姚宇阗,尚辉,等.微生物基覆盖材料对新垦滨海盐土理化性质的影响[J].灌溉排水学报,0,():-. |
| HAN Rui,YAO Yutian,SHANG Hui,et al.微生物基覆盖材料对新垦滨海盐土理化性质的影响[J].灌溉排水学报,0,():-. |
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| Effect of Microbiological Covering Material on Physical and Chemical Features in New Reclaiming Coastal Area |
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HAN Rui1, YAO Yutian2, SHANG Hui3, ZHANG Chi1, ZHENG Jinhai1, CHEN Lihua1
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1.Hohai University;2.Jiangsu Province Costal Development Co Ltd;3.Jiangsu Province Costal Development DongTai Co Ltd
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| Abstract: |
| 【Background】Coastal tidal flat is an ecological system with multiple functions in nature and an important carrier of coastal environment regulation. China's tidal flat is rich in resources; part of the shoreline is silty tidal flat. The tidal flat soil is mostly sodium chloride salt soil, which is rich in soluble salt content, lack of organic matter, nitrogen, phosphorus content and soil biomass, and poor in structure. The ecological function of tidal flat is poor. Tidal flat land is the reserve land resource in China, which is of great significance to ecological construction of tidal flat area.【Objective】The ecological construction of the coastal beach is beneficial for coastal areas, but high salinity of the soil in coastal area is not conducive for soil development and plant growth.Control of soil evaporation and water infiltration, increase formation of soil aggregate, decrease of salt accumulation and acceleration of salt elution rate in soil are conducive to the establishment of plant seedlings and the normal growth of plants, which is essential for vegetation construction. Fungi hypha can connect separated organic materials such as straw forming a whole thing. Fungi hypha can consolidate organic materials to form a closed covering, which can effectively cover the soil preventing evaporation. 【Method】Four treatments were set in this experiment, including reclaimed coastal soil treatment (RCS), conventional treatment (CVT), Sesbania cannabina treatment (SES), and Microbiological Covering Materials (MCMs) treatment (MCT). The effects of MCMs on the physical and chemical features and salt migration of coastal heavy saline soil, as well as on the growth status and biomass of S. cannabina was studied in the experiment. 【Result】Results showed that MCMs significantly increased biomass of S. cannabina (P<0.05), compared to SES treatment, S. cannabina biomass of MCT treatment increased by 75.83%. Compared to Reclaimed Coastal Soil（RCS） treatment, the field moisture capacity of the surface soil (0～10 cm) treated with MCT increased by 25.23%. The bulk density of MCT treatment for 0～10 cm, 10～20 cm and 20～30 cm soil decreased by 9.52 %, 9.46 % and 8.67 % respectively, as compared to RCS treatment, and the soil water content increased by 37.34%, 36.17% and 19.67%, the capillary porosity increased by 14.55%, 13.33% and 10.54% respectively. For MCT treatment, content of available P increased by 1.61, 2.98 and 2.81 times, the available K increased by 1.86 times, 90.08 % and 6.00 %, and the organic matter content increased by 5.06, 5.94 and 3.72 times respectively, as comparing to RCS treatment. Compared to RCS treatment, soluble salt content for MCT treatment were decreased by 87.25 %, 85.44% and 77.12% respectively in 0～10 cm, 10～20 cm and 20～30 cm soil. 【Conclusion】Under action of MCT, water conduction of surface soil and precipitation infiltration increase and soil evaporation reduces, which has great potential to prevent the soil from secondary salinization. The study shows that MCMs significantly increases biomass of S. cannabina, soil nutrients content, and accelerates salt migration rate in soil, which contribute to the ecological construction of the beach. |
| Key words: coastal area; microbiological covering materials; saline soil; soil physical and chemical features; Sesbania cannabina |
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