Su Dan, Zhang Meiqi, Chang Yao, Bai Jie, Ai Guiyan, Peng Yanhui, Pang Zhongyi, Sun Xuekai
College of Environmental Science, Liaoning University, Shenyang 110036, China.
CAS Key Laboratory of Forest Ecology and Silviculture, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China.
Plants (Basel). 2025 Jul 6;14(13):2067. doi: 10.3390/plants14132067.
Afforestation with var. in northern China is hindered by soil degradation. This study evaluated a ternary amendment combining sewage sludge (SS), cattle manure (CM), and maize straw (MS) to rehabilitate degraded sandy soils in the Horqin Sandy Land. Five treatments were tested: control (CK), SS (T1), SS + CM (T2), SS+MS (T3), and SS + CM + MS (T4). The ternary amendment (T4) achieved optimal outcomes: soil pH decreased from 8.02 to 7.79, organic carbon increased 2.5-fold, and total nitrogen (127%) and phosphorus (87.5%) were enhanced compared to CK. exhibited a 65.6% greater basal diameter and 29.5% height increase under T4, while heavy metal concentrations (Cd: -54.6%, Cu: -35.1%, Pb: -12.2% and Zn: -27.6%) were reduced. These findings highlight a synergistic waste valorization strategy for dryland afforestation, balancing soil fertility improvement with ecological safety. Future studies should prioritize long-term microbial community dynamics and field-scale validation.
中国北方的土壤退化阻碍了刺槐造林。本研究评估了一种由污水污泥（SS）、牛粪（CM）和玉米秸秆（MS）组成的三元改良剂对科尔沁沙地退化沙地土壤的修复效果。测试了五种处理方式：对照（CK）、SS（T1）、SS + CM（T2）、SS + MS（T3）和SS + CM + MS（T4）。三元改良剂（T4）取得了最佳效果：土壤pH值从8.02降至7.79，有机碳增加了2.5倍，与CK相比，总氮（增加了127%）和磷（增加了87.5%）有所提高。在T4处理下，刺槐的基径增大了65.6%，高度增加了29.5%，同时重金属浓度（镉：降低了54.6%，铜：降低了35.1%，铅：降低了12.2%，锌：降低了27.6%）有所降低。这些发现突出了一种用于旱地造林的协同废物增值策略，在提高土壤肥力与生态安全之间取得平衡。未来的研究应优先关注长期微生物群落动态和田间规模验证。
