Ameliorative effect of bioorganic material on coastal saline soil

doi:10.3969/j.issn.1004-1524.2019.04.13

›› 2019, Vol. 31 ›› Issue (4): 607-615.DOI: 10.3969/j.issn.1004-1524.2019.04.13

• Environmental Science • Previous Articles Next Articles

Ameliorative effect of bioorganic material on coastal saline soil

ZHOU Wenzhi, SUN Xiangyang, LI Suyan^*, ZHANG Le

College of Forestry, Beijing Forestry University, Beijing 100083, China

Received:2018-09-26 Online:2019-04-25 Published:2019-04-19

Abstract

Abstract: Biochar and green waste composting were selected to improve the coastal saline-alkali soil, in order to solve the problem of high salinity of coastal saline-alkali soil in Hebei Province. A two-factor four-level test (application rate of green waste composting was set as 0, 20, 40, 80 g·kg^-1 and denoted as G0, G1, G2, G3, respectively; application rate of biochar was set as 0, 10, 20, 40 g·kg^-1, and denoted as B0, B1, B2, B3, respectively) was designed and carried out through indoor soil culture. The dynamics of soil physical and chemical indicators, including soil pH, electrical conductivity (EC), sodium adsorption ratio (SAR), soil saturated hydraulic conductivity, and contents of Cl^-, $SO^{2-}_{4}$, organic matter were determined to explore the ameliorative effect of bioorganic material on costal saline soil. It was shown that soil pH showed no significant change with varied green waste composting application under B1 treatment. Except that, soil pH of G2 and G3 treatment was significantly (P<0.05) lower than that of G0 with the same biochar application rate. With the certain green waste composting application rate, B3 treatment significantly (P<0.05) increased soil pH. Without biochar addition, application of green waste composting significantly (P<0.05) reduced soil EC. Under G0 and G1 condition, application of biochar in B1 level significantly (P<0.05) reduced soil EC. Application of appropriate rate of biochar or green waste composting significantly (P<0.05) reduced soil SAR. Under G3 condition, addition of biochar significantly (P<0.05) lowered the content of soil $SO^{2-}_{4}$. With the same application rate of biochar, soil $SO^{2-}_{4}$ content of G3 treatment was significantly (P<0.05) higher than that of G0 treatment. Compared with B0G0 treatment, application of biochar in B3 level or green waste composting in G3 level significantly (P<0.05) reduced soil Cl^- content. Under the same application rate of biochar or green waste composting, addition of biochar or green waste composting significantly (P<0.05) increased soil organic matter, and application of appropriate biochar or green waste composting could significantly (P<0.05) increase soil saturated hydraulic conductivity. Overall, application of appropriate amount of biochar and green waste composting could both improve soil fertility and reduce soil pH and salinity.

Key words: coastal saline-alkali soil, biochar, garden waste compost, chemical improvement

CLC Number:

S156.4⁺2

ZHOU Wenzhi, SUN Xiangyang, LI Suyan, ZHANG Le. Ameliorative effect of bioorganic material on coastal saline soil[J]. , 2019, 31(4): 607-615.

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Ameliorative effect of bioorganic material on coastal saline soil

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