施钾水平对纽荷尔脐橙养分、产量和品质的影响

张绩,李俊杰,万连杰,杨江波,郑永强,吕强,谢让金,马岩岩,邓烈,易时来

Effects of Potassium Application Levels on Nutrient, Yield and Quality of Newhall Navel Orange

ZHANG Ji,LI JunJie,WAN LianJie,YANG JiangBo,ZHENG YongQiang,LÜ Qiang,XIE RangJin,MA YanYan,DENG Lie,YI ShiLai

表3 施钾量与果实氮、磷、钾带走量的数学关系

Table 3 Mathematical relationship between potassium application and fruit N, P₂O₅ and K₂O removal amount

养分 Nutrient	方程 Equation	顶点Peak point		R2
养分 Nutrient	方程 Equation	施肥量 Fertilizer application	养分量 Nutrient amount	R2
N	y=-36.1x²+54.6x+26.7	0.76	47.42	0.89
P₂O?	y=-8.8x²+14.0x+6.3	0.79	11.92	0.98
K₂O	y=-38.6x²+61.4x+22.6	0.80	47.03	0.96