Wu Jing, Ma Xiaoyan, Su Yuming, Qin Shengyi, Pilla Francesco
State Key Laboratory of Silica Sand Resources Utilization, Beijing, China.
School of Architecture, Planning and Environmental Policy, University College Dublin, Dublin, Ireland.
Sci Rep. 2025 Jan 28;15(1):3565. doi: 10.1038/s41598-025-87439-0.
The Chinese government attaches great importance to the ecological restoration of abandoned open-pit mines, increasing the area of cultivated land, and ensuring food security. Soil reconstruction is a crucial step in ecological restoration of abandoned open-pit mines. This study investigated the utilization of hydrophobic sand to create an Air-Permeable Aquiclude (APAC) under the plant root zones, thereby minimizing water infiltration and enhancing soil aeration. Field plot experiments for 2 years have been conducted, with control groups, Clay Aquitard (CAT), and Plastic Aquiclude (PAC), to evaluate the effects of APAC on rice yield, nitrogen utilization, and water efficiency. The findings revealed that utilizing APAC resulted in a significant rise in rice yield, ranging from 8.09 t/hm² to 9.27 t/hm², which were 7.67-27.16% higher than the control groups. Moreover, the APAC led to a remarkable reduction in irrigation water usage by 37.08%, alongside a substantial boost in Irrigation Water Productivity (IWP) efficiency by 28.64-71.12%. Notably, Nitrogen Partial Factor Productivity (NPFP) exhibited a substantial increase of 7.69-27.06%. These outcomes underscore the APAC's positive role in water and nutrient conservation and enhanced yields.
中国政府高度重视废弃露天矿的生态修复，增加耕地面积，保障粮食安全。土壤重构是废弃露天矿生态修复的关键步骤。本研究调查了利用疏水砂在植物根区下方创建透气隔水层（APAC），从而减少水分渗透并增强土壤通气性。已进行了为期2年的田间小区试验，设置了对照组、黏土隔水层（CAT）和塑料隔水层（PAC），以评估APAC对水稻产量、氮素利用和水分利用效率的影响。研究结果表明，使用APAC使水稻产量显著提高，增幅为8.09吨/公顷至9.27吨/公顷，比对照组高出7.67%至27.16%。此外，APAC使灌溉用水量显著减少了37.08%，同时灌溉水生产率（IWP）效率大幅提高了28.64%至71.12%。值得注意的是，氮素偏生产力（NPFP）显著提高了7.69%至27.06%。这些结果凸显了APAC在水分和养分保持以及提高产量方面的积极作用。
