1Department of Soil Science, College of Agricultural, Can Tho University, Can Tho, 90000, Vietnam
2Department of Land Resources, College of Environment and Natural Resources, Can Tho University, Can Tho, 90000, Vietnam
*Corresponding Author: Vo Quang Minh, Department of Land Resources, College of Environment and Natural Resources, Can Tho University, Can Tho, 90000, Vietnam, Email: vqminh@ctu.edu.vn
Online Published on 10 December, 2024.
To determine the effectiveness of controlled slow-dissolving NPK fertilizers with NPK 19-16-18 to improve soil nutrients on rice (Oryza sativa L.).
The field experiment was on saline-affected acid sulfate soil in Hau Giang province, Viet Nam, in the Winter-Spring rice crop 2018-2019. The experiment consisted of 2 treatments, corresponding to 2 formulas and 2 types of fertilizers, including new generation fertilizer application with the formula 50N-40P205 -30K20 kg/ha; and conventional fertilizers of 126N-88 P205-23K20. Each formula with 3 replications and each repetition is 1,000 m2.
The NPK-CFR fertilizers and urea humate help improve proper soil nutrients and total micro-organisms. In which; (i) when compared to the farmer’s control field, the rice growth and yield were comparable and did not differ significantly (5.68 tons/ha in the farmer’s control field and 5.85 tons/ha in the experimental field). (ii) However, when compared to the farmer’s field, the amount of fertilizer in the experimental field is reduced by more than 50%. Besides, the economic efficiency of NPK-CFR and Urea humate is higher than in farmers’ fields, from 1 to 8.6%. The total profit is higher than farmers’ fields. The NPK-CFR fertilizers and urea humate can be used to replace traditional fertilizers.
Acid soil, New fertilizer, Rice, Saline
