Effect of variety and nitrogen rate on the yield performance of boro rice

Abstract

An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during the period from November 2010 to May 2011 to study the effect of variety and rate of nitrogen on the performance of Boro rice. The experiment comprised three varieties viz., BRRI dhan28 (V1), BRRI dhan29 (V2) and BRRI dhan45 (V3); and five rates of nitrogen viz., control (N0), 50 kg (N1), 100 kg (N2), 150 kg (N3)and 200 kg (N4) N ha-1. The experiment was laid out in a randomized complete block design with four replications. The growth analysis results indicate that the tallest plant (80.88 cm) and the highest number of total tillers hill-1 (13.80) were observed in BRRI dhan29 at 70 DATs and the highest total dry matter (66.41 g m-2) was observed in BRRI dhan45. The shortest plant (78.15 cm) and the lowest number of tillers hill-1 (12.41) were recorded from BRRI dhan45 and the lowest dry matter (61.24 g) was observed in BRRI dhan29. The tallest plants (84.01 cm), highest number of tillers hill-1 (14.06) and the highest dry matter (69.58 g m-2) were obtained from 200 kg N ha-1. The tallest plants (86.48 cm) and maximum dry matter (72.30 g m-2) were recorded from BRRI dhan28 with 200 kg N ha-1 and BRRI dhan45 with 200 kg N ha-1, respectively. The highest number of tillers hill-1 (15.14) was obtained from BRRI dhan29 with 50 kg N ha-1. The harvest data reveal that variety had significant effect on total tillers hill-1, effective tillers hill-1, non-effective tillers hill-1, panicle length, grain yield, straw yield and harvest index. The highest grain yield (4.84 t ha-1) was recorded from BRRI dhan29. The results of the experiment also indicate that total tillers hill-1, effective tillers hill-1, grains panicle-1, sterile spikelets panicle-1, grain yield, straw yield and harvest index were significantly affected by levels of nitrogen, while plant height, panicle length, 1000-grain weight were not significantly affected by levels of nitrogen. The highest grain yield (5.58 t ha-1) was obtained from 200 kg N ha-1. Interaction effect of variety × 200 kg N ha-1 produced the highest grain yield (5.82 t ha-1). From the results of the study it may be concluded that BRRI dhan29 rice may be cultivated with 200 kg N ha-1 for obtaining higher yield in AEZ 9 of Bangladesh.Progressive Agriculture 26:6-14, 2015

Effect of Sowing Dates and Varieties on Economics and Nutrient Status of Direct Seeded Rice (Oryza sativa L.) and Soil

“…Higher dry matter accumulation and availability of nutrients might be the reason for higher NPK content of the variety GGV-05-01 and crop sown on 2 nd fortnight of June. Similar results were obtained by Chamely et al, 2014. Among different varieties, GGV-05-01 recorded higher NPK content (2.20, 0.79 and 3.09 %, respectively) and uptake (119.4, 40.5 and 127.3 kg ha -1 , respectively), whereas BPT-5204 recorded lower NPK content (1.83, 0.52 and 2.48 %, respectively) and uptake (85.4, 23.5 and 85.7 kg ha -1 , respectively). It is clear that nutrient uptake also depends on the varieties.…”

Response of Machine Transplanted Rice (Oryza sativa L.) to Different Nitrogen and Phosphorus Levels during Rabi

“…These results are in consonance with the findings of Chamely et al, (2015). Leaf area index of rice is closely related to grain production as it affects the rate of photosynthate production.…”

Nitrogen response of two high yielding rice varieties as influenced by nitrogen levels and growing seasons

“…Most of the agricultural soils in Bangladesh are deficient in N (P. K. Saha et al, 2012;Sarkar et al, 2016). Therefore, N fertilization is imperative for modern rice varieties in order to exploit their full yield potential (Chamely et al 2015). High yielding modern rice varieties show a greater response to applied nitrogen, while they differ in N demand depending on their genotype and agronomic traits under different climatic conditions (Rahman et al, 2007).…”