Effects of the Application of Biochar to Plant Growth and Net Primary Production in an Oak Forest
Effects of the Application of Biochar to Plant Growth and Net Primary Production in an Oak Forest
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DOI：
10.3390/f12020152
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发表时间：
2021-01
期刊：
影响因子：
2.9
通讯作者：
T. Ohtsuka;M. Tomotsune;M. Ando;Y. Tsukimori;H. Koizumi;S. Yoshitake
中科院分区：
文献类型：
--
作者：
T. Ohtsuka;M. Tomotsune;M. Ando;Y. Tsukimori;H. Koizumi;S. Yoshitake
很少有研究评价生物炭在森林生态系统中的应用及其在野外条件下的响应。我们在日本中部的一片橡树林的森林地面上人工散布了生物炭，以0（对照）、5和10 Mg ha−1（分别为C 0、C5和C10）的比率，测试生物炭对树木生长和生产力的影响。结果表明，在施用后的第2 ~ 3年，冠层栎（胸径> 20 cm）的胸径相对生长速率在C10与对照（C 0）相比显著增加，而在C5则无显著差异。尽管冠层树木的生长率不断增加，但树叶产量（NPPF）和木质产量（NPPW）对生物炭的施用没有反应。相反，生殖器官（NPPR，主要是橡树橡子）的产量随着生物炭施用率梯度（C 0为1.04 ± 0.09 Mg ha−1 yr−1，C5为1.30 ± 0.08 Mg ha−1 yr−1，C10为1.47 ± 0.13 Mg ha−1 yr−1）而增加。由于NPPR对总NPP的贡献相当小，C5（14.57 ± 0.20 Mg ha−1 yr−1）或C10（16.11 ± 0.73 Mg ha − 1 yr −1）的总NPP（=NPPW + NPPF + NPPR）与对照（15.07 ± 0.48 Mg ha − 1 yr − 1）相比没有显著差异。
Few studies have evaluated the application of biochar to forest ecosystems and their responses under field conditions. We manually spread grounded biochar on the forest floor, at rates of 0 (control), 5, and 10 Mg ha−1 (C0, C5 and C10, respectively), of an oak forest in central Japan to test the effects of biochar on tree growth and productivity. The relative growth rate of the diameter at breast height (dbh) of canopy oak trees (dbh > 20 cm) significantly increased in C10 compared with that of the control (C0), but not in C5, in the second to third years after application. Despite the increasing growth rate of canopy trees, foliage production (NPPF) and woody production (NPPW) did not respond to biochar application. Conversely, the production of reproductive organs (NPPR, mainly oak acorns) increased in line with the biochar application rate gradients (1.04 ± 0.09 Mg ha−1 yr−1 in C0, 1.30 ± 0.08 Mg ha−1 yr−1 in C5, and 1.47 ± 0.13 Mg ha−1 yr−1 in C10). Since the contribution of NPPR to total NPP was fairly small, there were no significant differences in total NPP (=NPPW + NPPF + NPPR) for C5 (14.57 ± 0.20 Mg ha−1 yr−1) or C10 (16.11 ± 0.73 Mg ha−1 yr−1) compared with the control (15.07 ± 0.48 Mg ha−1 yr−1).