增温对南亚热带森林土壤磷形态的影响及其对有效磷的贡献

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蒋芬¹^,²^,³, 黄娟¹^,², 褚国伟¹^,², 程严¹^,²^,³, 刘旭军¹^,²^,³, 刘菊秀¹^,², 列志旸¹^,²^,³^,^*(

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Effects of warming on soil phosphorus fractions and their contributions to available phosphorus in south subtropical forests

JIANG Fen¹^,²^,³, HUANG Juan¹^,², CHU Guo-Wei¹^,², CHENG Yan¹^,²^,³, LIU Xu-Jun¹^,²^,³, LIU Ju-Xiu¹^,², LIE Zhi-Yang¹^,²^,³^,^*(

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图2. 对照和增温处理下南亚热带森林每个土层的土壤不同形态磷(P)含量(平均值+标准误, n = 3)。Al-Pi, 无机铝磷; Al-Po, 有机铝磷; Ca-Pi, 无机钙磷; Fe-Pi, 无机铁磷; Fe-Po, 有机铁磷; NH₄Cl-Pi, NH₄Cl提取态磷; O-Pi, 无机闭蓄态磷; O-Po, 有机闭蓄态磷; Pi, 总无机磷; Po, 总有机磷; Pt, 总磷。不同小写字母表示不同处理间差异显著(p < 0.05)。

Fig. 2. Concentrations of different soil phosphorus (P) fractions of three soil layers under control and warming treatments in south subtropical forests (mean + SE, n = 3). Al-Pi, inorganic P associated with aluminum; Al-Po, organic P associated with aluminum; Ca-Pi, inorganic P associated with calcium; Fe-Pi, inorganic P associated with iron; Fe-Po, organic P associated with iron; NH₄Cl-Pi, NH₄Cl extracted P; O-Pi, inorganic occluded P; O-Po, organic occluded P; Pi, total inorganic P; Po, total organic P; Pt, total P. Different lowercase letters indicate significant differences between different treatments (p < 0.05)