Integrated nutrient management module to improve productivity and economics of short grain aromatic rice (Oryza sativa)- greengram (Vigna radiata) sequence

The present field study was carried out during 2017–18 and 2018–19 rainy (kharif) and winter (rabi) seasons in order to examine the impact caused by integrated nutrient management (INM) on the yield and quality of the short grain aromatic rice (Oryza sativa L.)-greengram (Vigna radiata L.) combination. Two years experimental data concluded that integration of 50% recommended dose (RD) as fertilizer + 50% RD of nitrogen via farm yield manure (FYM) resulted in considerably higher economic yield (3837.1 and 3917.7 kg/ha) of short grain aromatic rice cv. Nua Acharamati which were at par with 75% RD as fertilizer + green manuring of dhaincha (3438.5 and 3539.1 kg/ha). Pooled data revealed that, residual effect of 50% RD as fertilizer + 50% RD of nitrogen (FYM) and 75% RD as fertilizer + Rhizobium + PSB in greengram recorded the highest number of pods/plant (18.2), seeds/pod (11.3), pod length (9.3 cm), test weight (32.7 g), seed yield (925.7 kg/ha) and stover yield (2240.7 kg/ha) in greengram cv. IPM-02-03. Application of 50% RD as fertilizer + 50% RD of nitrogen (FYM) to aromatic rice recorded the highest hulling recovery (75.8 and 75.5%), milling recovery (68.0 and 68.3%), head rice recovery (60.0, 59.7%) and crude protein content (8.75 and 9.11%) during both of the years experiment being at par with application of 75% RD as fertilizer + green manuring. Economics of the system revealed the highest gross return, net return and B:C ratio by application of 50% RD as chemical fertilizer + 50% RD of nitrogen (FYM) in rice followed by 75% RD as chemical fertilizer + Rhizobium + PSB in greengram

Growth and Yield of Rice as Influenced by Nitrogen and Water Management Approaches

Achieving sustainability of the rice production in the irrigated areas in eastern India in general and Odisha in particular, under progressive climate change and variability, necessitates adoption of practices and technologies that increase food production, adaptation and mitigation in a feasible way. A field experiment was carried out for two consecutive years during 2020-21 and 2021-22 with kharif rice in the research farm of OUAT, Bhubaneswar. The experiment was conducted in a strip plot design having four each of water and nitrogen management approaches replicated four times. All the growth attributes like plant height, tillers/hill, LAI and dry matter production were superior under 3DADPW and INM treatments in water and nitrogen management approaches, respectively. Rotational irrigation 3 DADPW in rice resulted in higher grain yield (5.28 t/ha) followed by soil saturation. Similarly, INM practices comprising of Green manuring + 75% STBNR produced higher grain yield (5.45 t/ha) as compared to other N-management options and was closely followed by STBNR

Effect of Site Specific Nitrogen Management on Grain Quality and Productivity of kharif Rice

A field study was carried out during kharif at the Agronomy Main Research Farm, Department of Agronomy, College of Agriculture, OUAT, Bhubaneswar with the crop rice. The experiment was laid out in randomized complete block design with twelve site specific nitrogen management practices i.e. T1-RDF (80:40:40 kg N:P2O5:K2O ha-1), T2 - 20 kg N ha-1 at LCC score <4 with no basal N, T3 - 20 kg N ha-1 at LCC score <4 with 20 kg N ha-1 at basal, T4 - 20 g N ha-1  at SPAD value <35 with no basal N, T5- 20 kg N ha-1 at SPAD value <35 with 20 kg N ha-1 at basal, T6- 20 kg N ha-1 at Green seeker (GS) >1.25 RI with no basal N, T7- 20 kg N ha-1 at Green seeker (GS) >1.25 RI with 20 kg N ha-1 at basal, T8- 150 kg N ha-1 (N rich strip plot), T9- N omission plot, T10- STBN, T11- INM (20 kg N ha-1  as FYM at basal + 40 kg N ha-1  at tillering + 20 kg N ha-1  at PI stage), T12- Organic nutrient (FYM 10t ha-1 at basal + 2t ha-1  VC top dressing). The result of the experiment revealed that protein and carbohydrate yield were higher with application of 20 kg N ha-1 at Green seeker (GS) >1.25 RI with 20 kg N ha-1 at basal (410.4 and 4135.1 kg ha-1, respectively) followed by the treatment receiving 20 Kg N ha-1 at SPAD value <35 with 20 Kg N ha-1 at basal (395.5 and 3977.2 kg ha-1, respectively). Application of 20 kg N ha-1 at Green seeker (GS) >1.25 RI with 20 kg N ha-1 at basal recorded significantly higher grain yield (5.68 t ha-1), straw yield (6.57 t ha-1) and harvest index (47 %) followed by 20 kg N ha-1 at SPAD value <35 with 20 kg N ha-1 at basal