基于甘蔗产量与土壤磷素平衡的磷肥施用量研究

区惠平,周柳强,黄金生,朱晓晖,曾艳,彭嘉宇,谢如林,谭宏伟,李忠宁,沈小微,刘昔辉

Research on Phosphorus Application Rate Based on Sugarcane Yield and Phosphorus Balance in Soil

OU HuiPing,ZHOU LiuQiang,HUANG JinSheng,ZHU XiaoHui,ZENG Yan,PENG JiaYu,XIE RuLin,TAN HongWei,LI ZhongNing,SHEN XiaoWei,LIU XiHui

表2 不同施磷量对甘蔗吸磷量的影响

Table 2 Effect of phosphorus application rate on sugarcane P accumulation

年份 Year 处理 Treatment 蔗茎磷累积量 Cane P accumulation (kg·hm-2) 蔗叶磷累积量 Leaves P accumulation (kg·hm-2) 地上部磷累积量 Aboveground P accumulation (kg·hm-2) 2014 P0 11.2±0.59 b 5.7±0.31 b 16.9±0.87 c P1 11.7±0.39 b 8.0±0.13 a 19.6±0.52 b P2 13.3±0.69 a 8.3±0.08 a 21.6±0.69 a P3 13.5±0.24 a 7.8±0.23 a 21.3±0.41 a P4 14.1±0.46 a 7.9±0.24 a 22.0±0.23 a 2015 P0 8.5±0.44 b 6.2±0.62 b 14.7±0.90 b P1 10.4±0.21 ab 8.0±0.05 ab 18.4±0.22 a P2 12.3±0.29 a 7.1±0.39 ab 19.4±0.51 a P3 12.5±0.62 a 8.6±0.48 a 21.1±1.11 a P4 12.4±1.2 a 7.1±0.63 ab 19.5±1.34 a 2016 P0 6.9±0.46 b 4.6±0.15 c 11.5±0.47 c P1 9.4±0.18 ab 5.4±0.05 bc 14.8±0.14 bc P2 10.6±0.32 a 6.7±0.24 a 17.3±0.21 ab P3 10.7±1.52 a 7.3±0.35 a 18.0±1.45 ab P4 12.2±0.68 a 6.5±0.76 ab 18.6±1.39 a