商品有机肥替代部分化肥对连作棉田土壤养分、棉花生长发育及产量的影响

卢合全, 唐薇, 罗振, 孔祥强, 李振怀, 徐士振, 辛承松

Effects of commercial organic fertilizer substituting chemical fertilizer partially on soil nutrients, plant development, and yield in cotton

LU He-Quan, TANG Wei, LUO Zhen, KONG Xiang-Qiang, LI Zhen-Huai, XU Shi-Zhen, XIN Cheng-Song

表3 2016-2018年商品有机肥替代部分化肥对棉花叶绿素含量和净光合速率的影响

Table 3 Effects of commercial organic fertilizer replacing partial chemical fertilizer on SPAD and leaf (the second leaf from the top) P_n in cotton from 2016 to 2018

处理 Treatment	叶绿素含量 SPAD value			净光合速率 P_n (μmol CO₂ m^-2 s^-1)
处理 Treatment	2016	2017	2018	2016	2017	2018
NF	51.8±1.3 b	48.6±1.4 c	43.8±2.0 c	27.1±1.4 b	25.7±1.3 c	22.2±1.1 c
NPK	55.3±2.2 a	55.2±1.5 a	55.5±1.8 a	27.7±1.2 a	28.1±1.3 a	28.1±0.9 a
COF	54.7±1.1 a	53.3±1.3 b	53.0±1.6 b	27.5±1.5 a	26.5±1.8 b	25.7±1.2 b
NPK+COF	56.0±1.8 a	56.2±1.4 a	56.3±1.5 a	28.2±1.4 a	28.3±1.5 a	29.3±1.7 a
0.70NPK+COF	55.2±1.3 a	55.3±1.8 a	55.6±1.6 a	27.5±1.3 a	28.0±1.8 a	28.2±1.4 a