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《Journal of Soil and Water Conservation》 2018-03
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Research on Soil Absorbent Polymer and Microbial Fertiliser to Improve Semi-arid Soil and Afforestation

SONG Shuangshuang;SUN Baoping;ZHANG Jianfeng;Beijing Forestry University,School of Soil and Water Conservation;  
The mixed applications of an eco-friendly soil absorbent polymer(SAP)and a compound microbial fertiliser(MF)in the aeolian sandy soil was studied for the improvement project of afforestation in Zhangbei County.The mixed applications with low,moderate or high SAP(20,40,60 g/tree)and MF(150,300,450 g/tree)concentrations were used for the afforestation of Scots pine.Differences in field moisture capacities,available water contents,WSA percentages,microbial colony count and soil microbial biomass carbon/nitrogen(Smbc/Smbn)at different mixing ratios were analysed.The effects of SAP and MF on soil physical properties,soil microbes and survival rates of Scots pine were examined.The mixing ratio and amount applicable to afforestation in arid and semi-arid regions were explored.Results showed that SAP and MF could remarkably improve soil and increase survival rate,but the effects of the mixing ratio on these indicators varied with concentrations.When a single highly concentrated SAP was used,the field moisture capacity,available water content and WSA content were increased by 141%,150% and 63.8% respectively compared with the control.The mixed application of moderate SAP concentration and MF significantly increased the microbial activity and microbial colony count.In particular,the microbial activity and microbial colony count of fungi/bacteria/actinomycetes increased by 77%,108% and 93% compared with the control,respectively,and the Smbc/Smbnincreased by 132%,178%.The application of SAP and MF significantly promoted plant growth.The plant height and basal diameter respectively increased by 6% and 12% compared with the control.The improvement of survival rate by single SAP was greater than that of the mixed application.The moderate SAP concentrations increased the survival rate of Scots pine.During afforestation in arid and semi-arid regions,the application of moderate SAP concentration mixed with MF could improve soil and increase survival rate of afforestation.
【Fund】: 河北省张家口地区干旱造林保水材料试验研究项目(2014HXFWSBXY003)
【CateGory Index】: S714;S728.2
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