Improvement effect of different amendments on soil fertility status of saline alkali soil in Hexi Irrigation Area
[Objective]By exploring the effects of different types of amendments on soil fertility improvement in saline alkali land,this study aims to further enhance the production capacity of saline alkali land and promote the sustainable development of China's agricultural economy.[Method]A single factor randomized block experiment was conducted in the field,with no application of amendments as the control(CK),organic fertilizer(T1),flyash(T2),biochar(T3),furfural residue(T4),vermicompost(T5),humic acid(T6),kejianwang(T7),flyash+organic fertilizer(T8),flyash+furfural residue(T9),biochar+furfural residue(T10),and vermicompost+humic acid(T11)as the amendments.The improvement effects of 11 soil amendments on soil fertility in saline alkali soil of the Hexi Corridor were explored.[Result]Different amendments can improve soil organic matter and nitrogen,phosphorus,and potassium nutrient content to varying degrees.Compared with CK,each amendment treatment significantly increased the soil organic matter content in the 0-30 cm and 30-60 cm soil layers of saline alkali land,with the increases of 4.09%-26.44%and 14.67%-28.38%,respectively.The biochar+furfural residue treatment showed thehighest improvement,followed by biochar and organic fertilizer treatment;Compared with CK,organic fertilizer treatment significantly increased the total nitrogen,available phosphorus,and available potassium content in each soil layer,with the increases of 591.15%,111.91%,and 242.01%in the 0-30 cm soil layer and the increases of 148.16%,154.60%,and 93.08%in the 30-60 cm,respectively.[Conclusion]Both single application of organic fertilizer and biochar combined with application of furfural residue could effectively improve the nutrient content of saline alkali soil,which has a significant advantage in the comprehensive improvement and utilization of saline alkali land in the region.
国家科技期刊平台
NSTL
万方数据
