Acta Geographica Sinica ›› 2022, Vol. 77 ›› Issue (7): 1701-1712.doi: 10.11821/dlxb202207009

• Black Soil Conservation and Utilization • Previous Articles     Next Articles

Corn stalk return and manure amendment improve acid neutralizing capacity of a black soil in Northeast China

JIANG Yong1,4(), ZHANG Yongyong1, LI Tianpeng1, WANG Ruzhen1, WANG Cong1, ZHANG Yuge2, GAO Hongjun3, ZHU Ping3, LI Hui1()   

  1. 1. Institute of Applied Ecology, CAS, Shenyang 110016, China
    2. College of Environment, Shenyang University, Shenyang 110044, China
    3. Institute of Agriculture Environment and Resources, Jilin Academy of Agricultural Sciences, Changchun 130033, China
    4. School of Life Sciences, Hebei University, Baoding 071002, Hebei, China
  • Received:2021-11-04 Revised:2022-04-06 Online:2022-07-25 Published:2022-09-13
  • Contact: LI Hui;
  • Supported by:
    Strategic Priority Research Program of the Chinese Academy of Sciences(XDA28060304);National Natural Science Foundation of China(31870441);National Natural Science Foundation of China(32071563)


Long-term application of chemical fertilizers can lead to soil acidification, basic cation depletion, nutrient imbalance and heavy metal pollution of crops in farmland of Black Soil regions. Based on a 25-year National Black Soil Fertilizer Efficiency Monitoring Experiment in Gongzhuling, Jilin Province, the effects of 8 different fertilization treatments on soil acid neutralizing capacity (ANC) was examined, including no fertilization (Control or C), N, NP, NK, PK, NPK, combination of farmyard manure with chemical fertilizers (MNPK), and corn stalk return (SNPK). The application rates of N, P and K were 165, 36 and 68.5 kg hm-2 a-1, respectively, and N input was the same among NPK, MNPK and SNPK treatments. Results showed that chemical fertilizer application decreased topsoil pH by 0.37-1.39, while MNPK and SNPK treatments increased soil pH by 0.21 and 0.53, respectively. Acid neutralizing capacity as soil pH dropped to 5.0 (ANCpH 5.0) of N, NP, NK, PK and NPK treatments was 42.85%, 61.79%, 54.05%, 82.26% and 63.68% of the Control, respectively, while the ANCpH 5.0 of MNPK treatment was 1.86 times of the Control. With 160 mmol kg-1 H+ addition, the pH of SNPK-treated soil only decreased from 7.65 to 6.42, showing an extremely strong acid neutralizing capability. Soil exchangeable base cations were 1.37 and 1.14 times, while soil organic matters were 1.32 and 1.63 times, in SNPK and MNPK treatments as much as that in the Control, respectively, which are two main factors in improving soil ANC. In brief, the addition of organic materials significantly improved the anti-acidification properties and soil basic fertility level of the black soil. The results could provide theoretical basis and data support with long-term experiment evidence for the practices of conservation tillage with corn stalk return and chemical fertilizers partly substituted by farm-yard manure in black soil regions of Northeast China.

Key words: black soil, soil fertility, soil acidification, acid buffering capacity, corn stalk return, manure amendment