Effect of date of transplanting and nitrogen on productivity and nitrogen use indices in hybrid and non-hybrid aromatic rice

Abstract

A field experiment was carried out during the rainy (kharif) season of 2001 at the experimental farm of the Indian Agricultural Research Institute, New Delhi, India, to study the effect of date of transplanting and nitrogen on yield attributes, yields, nutrient accumulation and nitrogen use efficiencies in hybrid and non-hybrid aromatic rice. The experiment consisted of 9 treatments with 2 varieties (Pusa Basmati 1 and Pusa Rice Hybrid 10), 3 transplanting dates (3, 10 and 17 July, 2001) and 4 nitrogen levels (0, 60, 120 and 180 kg N ha-1). Pusa Rice Hybrid 10 had significantly higher values of yield attributes (panicles hill-1, panicle weight, spikelets panicle-1, filled grains panicle-1, 1000-grain weight), yields and nutrient accumulation than the non-hybrid Pusa Basmati 1. There were significant reductions in yield attributes, yields and nutrient accumulation after delayed transplanting. Timely transplanting on 3 July led to 8.4 and 19.1% higher grain yield than transplanting on 10 and 17 July, respectively. Successive nitrogen levels had a significant effect on yield attributes (except 1000-grain weight), yields and nutrient accumulation up to 120 kg N ha-1. The maximum grain yield (5.87 t ha-1) was recorded at the highest level of N nutrition (180 kg Nha-1) and was 4.2, 15.5 and 39.3% higher than in the 120 kg, 60 kg N ha-1 and control treatments, respectively. Pusa Rice Hybrid 10 also had significantly higher values of agronomic nitrogen use efficiency (ANUE) (12.5 kg grain kg-1 N applied), apparent nitrogen recovery (27.4%), physiological NUE (44.2 kg grain kg-1 N uptake), N harvest index (62.7%), N efficiency ratio (119.6 kg dry matter kg-1 N uptake) and physiological efficiency index of nitrogen (47.4 kg grain kg-1 N uptake) than non-hybrid Pusa Basmati 1.

Assessment of Rice Inbred Lines and Hybrids under Low Fertilizer Levels in Senegal

“…Increasing fertilizer levels did not lead to heavy grains because the sink capacity (i.e., spikelet number) was high in the cultivars during both years. These findings agreed with previous research [12,[18][19][20]. A high number of panicles per m 2 and the number of filled grains per panicle will increase grain yields.…”

“…It promotes rapid growth and increases leaf size, spikelet number per panicle, percentage of filled spikelet in each panicle and grain protein content [10][11][12][13][14] also indicated that the grain yield of most rice hybrids significantly increased when N-fertilizer went up to 180 kg ha −1 . Lin et al [15][16][17][18][19][20][21][22] found that the system of rice intensification (SRI) can significantly reduce N-fertilizer use due to planting hybrid seed at low density. High fertilizer levels also extended the vegetative growth.…”

Enrichment of Basmati Rice Grain and Straw With Zinc and Nitrogen Through Ferti-Fortification and Summer Green Manuring Under Indo-Gangetic Plains of India

“…ammoniavolatilization, denitrification, leaching in submerged soil and runoff losses (Prasad and Power, 1995;Prasad et al, 1998;Prasad, 2005). The low AE of applied N in green manuring plots was due to N contributed by summer green manuring crops (Singh et al, 2004). The positive effect of applied Zn on grain yield caused an increase in AE of applied N.…”

Agronomic Performance of Rice (Oryza sativa L.) As Affected By planting System, Date of Transplanting, Source and Dose of Nitrogen

“…However, T 1 (SRI + 7 th July + 100% RDN through Urea) and T 2 (SRI + 7 th July + 75% RDN through Urea + 25% RDN through PM) were found to be statistically at par with treatment T 3 (SRI + 7 th July + 50% RDN through Urea + 50% RDN through PM). This might be owing to longer growing period of the crop for better development of parts to allocate greater accumulation of photosynthates in early planting, resulting in the better development of growth and yield attributes (Singh et al, 2004).…”