Effects of zinc on growth and yield of rice cv. BRRI dhan29 under alternate wetting and drying water management practice

Abstract

Insufficient zinc (Zn) and water are key concerns in agricultural production, resulting in lower yields and nutritional qualities. The goal of the study was to figure out how water management and Zn application rates affect the growth and yield of rice. The experiment was carried out in a split-plot design with three replications. The treatments consisted of two factors, a) water management, like 1) Continuous flooding (CF) and 2) Alternate wetting and drying (AWD) system and b) Zn application like 1) Control (0% Zn), 2) 75% Zn, 3) 100% Zn, 4) 125% Zn, and 5) 150% Zn of the recommended dose. All the plots received an equal amount of NPKS fertilizers. The application of Zn in both AWD and CF systems had a significant effect on a number of grains panicle -1 , 1000 grain weight and grain yield. The highest value for both yield contributing traits and yield was obtained by the application of 150% Zn in the AWD system. However, the lowest value was found in the control treatment of the CF system for both the yield components and yield. It is also evident that the growth rate of yield components and yield was increased with increased doses of Zn in both AWD and CF systems. In Bangladesh, farmers involved in rice cultivation may be benefited following the treatment of 150% Zn and AWD irrigation systems.

Growth and yield performance of hybrid rice varieties under varying zinc levels

“…increase in grain weight upon zinc fertilization could be attributed to enhanced zinc uptake and translocation of sugars and higher carbohydrate accumulation in seed. Similar results have been reported by Kumar et al (2017) and Farzana et al (2021). The interaction effect indicated that the maximum 1000-seed weight (27.43 g) was with interaction of BRRI hybrid dhan5 with 6 kg Zn ha -1 .…”

“…Among the rate of Zn application, the longest panicle (27.14 cm) was recorded in 6 kg Zn ha -1 and the shortest panicle (24.78 cm) obtained from 0 kg Zn ha -1 treatment. A similar kind of result was also reported by Farzana et al (2021) in which the adequate supply of zinc results in the greater panicle length. The interaction effect of different rate of variety and zinc in hybrid rice, the longest panicle (29.45 cm) was recorded in BRRI hybrid dhan5 along with 6 kg Zn ha -1 treatment combination.…”

“…In comparison, the shortest plant at 30, 60, 90 DAT and harvest (15.59,28.81,62.29 and 109.62 cm) respectively was obtained from the control treatment (Figure 1B). Similar findings were made by Farzana et al (2021), who concluded that Zn, in the right concentrations, speeds up the metabolism of auxin and the activity of plant enzymes. Considering the interaction effect at 30, 60, 90 and harvest, the tallest plant (22.67, 49.56, 88.22 and 124.10 cm) respectively was recorded from BRRI hybrid dhan2 along with 6 kg Zn ha -¹ treatment combination.…”

“…According to Farzana et al (2021), the higher yield brought on by Zn fertilization is due to its involvement in a number of metallic enzyme processes, regulatory activities, and auxin formation, as well as better carbohydrate synthesis and delivery to the grain-growing region. The interaction effect of different varieties and different rates of zinc application applied that, the combination of BRRI hybrid dhan5 along with 6 kg Zn ha -1 produced the highest grain yield (7.8 t ha -1 ).…”

Determination of Critical Limit of Zinc for Rice (Oryza sativa L.) and Potato (Solanum tuberosum L.) Cultivation in Floodplain Soils of Bangladesh

“…The increase was higher in low-Zn-containing soils than high-Zn-containing soils. The application of Zn to soil exhibited approximately a 10% increase in dry shoot biomass compared to when no Zn was applied to soil [29]. Naik and Das [30] reported that the application of Zn to low land rice soil resulted in the 37.8% and 20.9%, the most significant increase in the grain and straw yield of rice, respectively, over the control.…”