| Effect of furrow irrigation and organic manure on sweet-waxy maize yield and soil organic carbon and enzyme activity |
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| DOI：10.7606/j.issn.1000-7601.2016.03.05 |
| Key Words: partial root-zone irrigation organic manure ratio of organic to inorganic N enzyme activity organic carbon fraction sweet-waxy maize |
| Author Name | Affiliation | | LUO Hui | College of Agriculture, Guangxi University, Nanning 530005, Guangxi, China
Guangxi Academician Work Station of the New Technology of Water-saving Agriculture in Karst Region, Nanning 530005, Guangxi, China | | WU Xiang-ying | College of Agriculture, Guangxi University, Nanning 530005, Guangxi, China
Guangxi Academician Work Station of the New Technology of Water-saving Agriculture in Karst Region, Nanning 530005, Guangxi, China | | LI Fu-sheng | College of Agriculture, Guangxi University, Nanning 530005, Guangxi, China
Guangxi Academician Work Station of the New Technology of Water-saving Agriculture in Karst Region, Nanning 530005, Guangxi, China
Guangxi Colleges and Universities Key Laboratory of Crop Cultivation and Tillage, Nanning 530005, Guangxi, China |
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| Abstract: |
| To improve maize yield and soil quality through irrigation and fertilization, a field experiment was conducted to investigate the effect of conventional furrow irrigation (CFI), alternate irrigation on every other furrow (AFI) and irrigation on every other furrow (FFI) on sweet-waxy maize yield and soil organic carbon fraction and enzyme activity. Three organic fertilization modes were used, i.e. cattle manure FC, biological-organic fertilizer FB and pig manure FP, and two ratios of inorganic to organic N, 70% inorganic N+30% organic N treatment and 60% inorganic N+40% organic N treatment. At FFI, compared to FB, FC and FP increased fresh yield of sweet-sticky maize by 1.6% and 2.3%, and FC increased soil readily oxidized organic carbon (ROC) and microbial biomass carbon, and FP increased soil dissolved organic carbon (DOC). Under the three furrow irrigation methods, compared to FC1, FC2 increased the fresh yield of sweet-sticky maize, the activities of catalase and invertase and the contents of organic carbon (SOC), ROC and DOC in soil, and increased the contents of ROC and DOC by 14.5%～37.9%和24.3%～78.5%. Compared to CFI, at FC1, the contents of ROC in AFI and FFI at tasselling stage, the contents of DOC in AFI at filling stage and FFI at maturing stage were significantly enhanced, while at FC2, it increased organic carbon in FFI at tasselling stage by 10.3%, ROC in AFI and FFI at tasselling and maturing stages by 19.8%～31.5%, DOC in FFI at filling and maturing stages by 57.9% and 26.1%. The sweet-waxy maize yield was significantly positively correlated with the invertase, SOC, ROC and DOC at filling stage, and SOC and ROC was also significantly correlated at filling stage. Thus the combination of 60% inorganic N and 40% organic cattle manure N and fixed or alternate furrow irrigation is recommended as suitable method for improving the water and fertilizer use efficiency in the target areas. |
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