Effects of Chemical Fertilizer Application upon the Water Quality Parameters of a Rice–Eel (Monopterus albus) Coculture System

Table 1

Treatment groups and fertilizer dosage (kg/ha).

Fertilization stage	Base fertilizer	Rejuvenated fertilizer	Tiller fertilizer	Ear granule fertilizer		Actual nutrient consumption
Fertilization time	2022.6.23	2020.7.6	2020.7.19	2020.8.9
Fertilizer sources	Compound fertilizer	Compound fertilizer	Urea	Urea	Compound fertilizer	N	P2O5	K2O
No fertilization (NF)	0	0	0	0	0	0	0	0
Regular fertilization (RF)	449.8	337.3	73.3	81.4	187.4	266.1	116.9	155.9

Note. Urea contains 46% nitrogen; total nutrients of the compound fertilizer is 48%, in the form of N-P₂O₅-K₂O as 20%-12%-16%. The amount of fertilizer in the experimental plot is converted here according to each plot’s area (10 m²).