Dry matter accumulation and nitrogen use efficiency response of rice cultivars to nitrogen management
Journal Title: Journal of Biodiversity and Environmental Sciences (JBES) - Year 2014, Vol 4, Issue 3
Abstract
Irrigated rice in Iran involves global rice production and global nitrogen (N) consumption. The low agronomic N use efficiency (kg grain yield increase per kg N applied) of this system is below. So the objective of this study was to determine the possibility to improve the N use efficiency of irrigated rice in Iran by comparing the farmers’ Nfertilizer contents usage. Field experiments were conducted three rice cultivars (Hashemi, Kazemi, Khazar) in a completely randomized block design with 3 replications were used to study the effects of nitrogen fertilizer on nitrogen use efficiency, yield and characteristics of nitrogen uptake during two years (2008-2009) in paddy soil in Guilan province, Iran. In this experiment, four treatments including: N1-control (no N fertilizer); N2- 30 kg ha- 1 N (at transplanting time); N3- 60 kg ha-1 N (at transplanting, and tillering times); N4- 90 kg ha-1 N were compared. Results showed that the effect of N application on yield increasing was remarkable whereas N4 created the highest yield (3662kg ha-1). Dry matter, total N uptake, physiological Nitrogen use efficiency (PNUE), apparent nitrogen recovery efficiency (ANRE) and agronomic nitrogen use efficiency (ANUE) was varied in different cultivars significantly and Khazar variety had the highest contents. Maximum dry matter and total N uptake were achieved mostly at 90 kg N ha-1, which were significantly higher than other treatments .Physiological N use efficiency (PNUE), agronomic nitrogen recovery efficiency (ANRE) increased from zero nitrogen to 30kg N ha-1 significantly and the result were reversed from N2 to high content of nitrogen application (90 kg N ha-1).
Authors and Affiliations
MandanaTayefe
Keywords
Related Articles
- EP ID EP37601
- DOI -
- Views 196
- Downloads 0
Species richness and diversity of terrestrial molluscs (Mollusca, Gastropoda) in Yapo classified forest, Côted’Ivoire
The land snail species richness and diversity in Yapo classified forest, Côte d’Ivoire, was studied using a combination of direct search and leaf-litter sieving techniques. In total, 27 species and 1045 individuals in 8...
Elucidation of cow tick Rhipicephalus microplus (formerly Boophilus microplus) reproduction in general santos city, Philippines
Ticks comprise one of the most significant groups of arthropods in terms of effects on animal health. They incapacitate the host by feeding on it. The cattle tick, economically impact cattle industry in tropical and su...
Phytochemical analysis and cytotoxic activity of ant plant (Myrmecodia tuberosa Jack.)
Myrmecodia tuberosa Jack (Rubiaceae) has been used as part of traditional Philippine remedies for a wide range of therapeutic usages. The results of this will prove the curability and effectiveness of this plant to some...
Species/geographic boundaries and evolutionary interrelationships of cultivated linden-trees (Tilia L.) based on morphological and nrDNA ITS characteristics
Nuclear ribosomal transcribed spacers (ITS1-5.8S rRNA-ITS2) is a popular marker that has superior taxa resolution in some groups of organisms. A taxonomic reassessment of 27 Tilia taxa combining a molecular marker (ITS...
Genotoxicity and oxidative stress analysis in the Catla catla treated with ZnO NPs
In the history of human beings nanotechnology is one of the fastest growing industries and has been referred to as next industrial revolution. Zinc oxide nanoparticle (ZnO NPs) high concentration causes genotoxicity in t...