Estimated phytolith C sink produced by global farm crops in 2011.

avalues from FAO [29];bmass ratios of the Si-rich organ: crop output from Huang et al. [35] and Zhu et al. [36];cANPP: above-ground net primary productivity;destimated from the crop output and Si-rich organ factor and PhytOC content in Table 1 using equations (2, 3);eThe crop output of sugar cane is fresh cane weight.a：相关数值取自联合国粮食及农业组织（Food and Agriculture Organization，FAO）[29]；b：富硅器官质量比与作物产量数据取自Huang等[35]与Zhu等[36]；c：ANPP，即地上净初级生产力（above-ground net primary productivity）；d：通过结合表1中的作物产量、富硅器官系数与植硅体碳（PhytOC）含量，利用公式（2）与（3）计算得到；e：甘蔗的作物产量以鲜蔗重量计