Affiliation:
1. College of Water Conservancy and Hydropower Engineering, Agricultural Water‐Soil Engineering Sichuan Agricultural University Ya'an City Sichuan Province China
2. Central & Southern China Municipal Engineering Design and Research Institute Co, Ltd Wuhan City Hubei Province China
3. Bureau Agricultural and Rural Affairs of the Wufeng Tujia Autonomous County Yichang City Hubei Province China
Abstract
AbstractSoil acidification in tea gardens has become an increasingly serious problem. In this study, we conducted an outdoor pot experiment to investigate the effects of pruned tea leaf biochar and cattle manure on soil acidification. We observed that amendments effectively increased soil pHBC, which increased 12.43%, 3.24%, 8.38%, 5.68% and 11.35% for BC, M, BCM1, BCM2 and BCM3. Exchangeable K+, Na+, Ca2+ and Mg2+ concentrations increased after application of the amendments. Furthermore, the total exchangeable acidity concentration (EA) and the exchangeable Al3+ and H+ concentration (Al3+ and H+) decreased after application of amendments. In addition, pHBC showed a strong positive correlation with K+, Na+, Ca2+, Mg3+ and cation exchange capacity and strong negative correlations with EA and Al3+. Moreover, EA and K+ were the primary factors influencing pHBC. The relationships among pHBC, EA and K+ can be expressed as a power function.