Chen Hong-Xia, Du Zhang-Liu, Guo Wei, Zhang Qing-Zhong
College of Agronomy, Shenyang Agricultural University, Shenyang 110866, China.
Ying Yong Sheng Tai Xue Bao. 2011 Nov;22(11):2930-4.
A 3-year field experiment with randomized block design was conducted to study the effects of biochar amendment on the soil bulk density, cation exchange capacity (CEC), and particulate organic matter C (POM-C) and N (POM-N) contents in a high-yielding cropland in the North China Plain. Four treatments were installed, i.e., chemical NPK (CK), chemical NPK plus 2250 kg x hm(-2) of biochar (C1), chemical NPK plus 4500 kg x hm(-2) of biochar (C2), and 750 kg x hm(-2) of biochar-based slow release fertilizer (CN). Comparing with CK, treatments C1 and C2 significantly decreased the bulk density of 0-7.5 cm soil layer by 4.5% and 6.0%, respectively, and the treatments with biochar amendment increased the CEC in 0-15 cm soil layer, with an increment of 24.5% in treatment C2. Biochar amendment also increased the C (POM-C) and N (POM-N) contents in 0-7.5 cm soil layer, e.g., the POM-C and N contents in treatment C1 and C2 were 250% and 85%, and 260% and 120% higher than those of the CK, respectively. After three years of biochar amendment, the soil had obvious improvement in its physical and chemical properties, and played more active roles in soil carbon sequestration and greenhouse gases emission reduction.
在中国华北平原的高产农田进行了一项为期3年的随机区组设计田间试验，以研究生物炭改良对土壤容重、阳离子交换量（CEC）以及颗粒有机碳（POM-C）和氮（POM-N）含量的影响。设置了4种处理，即化学氮磷钾（CK）、化学氮磷钾加2250 kg·hm⁻²生物炭（C1）、化学氮磷钾加4500 kg·hm⁻²生物炭（C2）和750 kg·hm⁻²生物炭基缓释肥料（CN）。与CK相比，C1和C2处理分别使0 - 7.5 cm土层的容重显著降低了4.5%和6.0%，生物炭改良处理增加了0 - 15 cm土层的CEC，C2处理增幅为24.5%。生物炭改良还增加了0 - 7.5 cm土层的碳（POM-C）和氮（POM-N）含量，例如，C1和C2处理的POM-C和N含量分别比CK高250%和85%，以及260%和120%。经过3年生物炭改良后，土壤理化性质有明显改善，在土壤固碳和温室气体减排方面发挥了更积极的作用。
