Influence of Swine Wastewater Irrigation and Straw Return on the Accumulation of Selected Metallic Elements in Soil and Plants

Siyi Li, Zhen Tao, Yuan Liu, Shengshu Li, Rakhwe Kama, Chao Hu, Xiangyang Fan and Zhongyang Li ()
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Siyi Li: Agricultural Water and Soil Environmental Field Science Observation Research Station, Institute of Farmland Irrigation of CAAS, Xinxiang 453002, China
Zhen Tao: Agricultural Water and Soil Environmental Field Science Observation Research Station, Institute of Farmland Irrigation of CAAS, Xinxiang 453002, China
Yuan Liu: Agricultural Water and Soil Environmental Field Science Observation Research Station, Institute of Farmland Irrigation of CAAS, Xinxiang 453002, China
Shengshu Li: Agricultural Water and Soil Environmental Field Science Observation Research Station, Institute of Farmland Irrigation of CAAS, Xinxiang 453002, China
Rakhwe Kama: Agricultural Water and Soil Environmental Field Science Observation Research Station, Institute of Farmland Irrigation of CAAS, Xinxiang 453002, China
Chao Hu: Agricultural Water and Soil Environmental Field Science Observation Research Station, Institute of Farmland Irrigation of CAAS, Xinxiang 453002, China
Xiangyang Fan: Agricultural Water and Soil Environmental Field Science Observation Research Station, Institute of Farmland Irrigation of CAAS, Xinxiang 453002, China
Zhongyang Li: Agricultural Water and Soil Environmental Field Science Observation Research Station, Institute of Farmland Irrigation of CAAS, Xinxiang 453002, China

Agriculture, 2024, vol. 14, issue 2, 1-17

Abstract: Treated livestock wastewater reuse for irrigation and straw return in arid regions have become common practices worldwide. However, many uncertainties still exist regarding the effects of the returning straw sizes on heavy metal accumulation in soil and plants under treated livestock wastewater irrigation. In a pot experiment growing maize and soybean, large (5–10 cm), medium (1–5 cm), and small (<1 cm) sizes of wheat straw were amended to assess the changes in Cu and Zn distribution in the rhizosphere, bulk soils, and plants. Groundwater and swine wastewater were used as irrigation water resources. The results showed that irrigation with swine wastewater significantly reduced soil pH and increased the concentration of soil-available potassium. Concentrations of Cu in soil were more sensitive to swine wastewater and straw application than those of Zn in soil. Swine wastewater irrigation increased the accumulation of Cu and Zn in plants with higher concentrations of Zn, while straw return tended to inhibit this increase, especially when a small size of straw was employed. In addition to providing a reference for revealing the interaction mechanism between swine wastewater irrigation and straw return, this study proposes feasible solutions to improve the efficiency of agricultural waste recycling and realize sustainable agricultural development.

Keywords: livestock wastewater; straw return; soil; heavy metal (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2024
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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