Methods of Urea Fertilizer Application Influence Growth, Yield, and Nitrogen Use Efficiency of Transplanted Aman Rice

Abstract

Although urea placed deep reduces nitrogen (N) loss and increases rice yield, its use is not expanding due to the lack of effective application methods. A study was carried out to determine how different urea application techniques affected the yield and nitrogen use efficiency (NUE) of transplanted Aman rice (cv. BRRI dhan46). The experiment was set up in a RCBD design with seven treatments: T1 (deep placement of urea briquettes (DPUB) by hand), T2 (DPUB by battery-powered applicator), T3 (deep placement of prilled urea (PU) briquettes by BRRI applicator), T4 (DPUB by injector applicator), T5 (DPUB by push-type applicator), T6 (broadcast application of PU), T7 (zero-N), and three replications. Findings showed that the NH4+-N concentration in field water peaked on day 3 and then rapidly fell as time passed, while the NO3−-N concentration in the water and soil was minimal. T1 reported the highest grain yield, total N content and uptake, whereas T7 had the lowest values. On T1, the apparent N recovery reached its highest level (73.5%). The NUE varied from 13.26% in T3 to 29.38% in T1. Based on this finding, deep placement of urea briquette by hand is recommended for increasing the yield and NUE of T. Aman rice.

Investigation of Salt and Nitrogen Distribution under Belt Plastic Film Mulching in Surface- and Drip-Irrigated Maize Field in Hetao Irrigation District

“…Compared to traditional broadcast N fertilizer with the mulching prac-tice, the method of applying nitrogen fertilizer at the 6 cm soil depth causes 21-25% higher nitrogen uptake and a 15-20% higher grain yield of maize crops [32]. Similarly, deep application of urea increased the rice yield and straw mass by approximately 10~15% compared to the traditional broadcast application [71]. Meanwhile, mulching reduces the salt accumulation in the root zone and provides a low salt condition for crop growth.…”

Improving Ammonia Emission Model of Urea Fertilizer Fluidized Bed Granulation System Using Particle Swarm Optimization for Sustainable Fertilizer Manufacturing Practice

“…In Malaysia, urea fertilizer subsidies are provided by the government to assist farmers in gaining better productivity [5]. The effectiveness of urea-based fertilizer in improving productivity and yield of maize and paddy is reported in [6] and [7], respectively.…”

Effect of NPS Fertilizer, Spraying Nano-NPK+TE and Cerium Oxide NPs on Growth and Yield of Rice (Oryza Sativa L.)

“…or trying to find a balance of nutrients and compensate for the lost ones by adding larger quantities of fertilizers, so Fertilization Balanced means achieving available soil nutrients and creating an ideal environment for plant growth and organisms in the soil, so it requires ensuring that the amount of the nutrient reaches the optimum level in the soil [8], and some soils have a high content of basic elements N, P, K, S and in such these cases [9], the addition of mineral fertilizers to these soils in large quantities is not required except for the quantities added to compensate for the shortage of the cultivated crops, then the lost is compensated with different forms of a single elemental fertilizer, a compound or a mixture fertilizer [10], and these additions are considered necessary, especially when cultivating grain crops such as corn Yellow and rice that absorbed large quantities of soil nutrients, especially nitrogen, as the soil then needs additional urea fertilizer to be added in two or three batches gradually in order for the plant to benefit from it in the largest possible quantities and reduce the amounts of volatilized and washed from it, as more than 40% of the urea is lost added [11].…”