article · Plants
Chemical nitrogen fertiliser is widely used in field crops, yet rice plants typically consume less than half of what is applied. Field trials across two successive summer seasons in Egypt assessed fifty-five rice genotypes under four nitrogen fertiliser levels ranging from zero to 165 kilograms per hectare. Statistical evaluations using the Additive Main Effects and Multiplicative Interaction model revealed significant interactions between genotypes and nitrogen levels that influenced grain yield performance. Six genotypes, including MTU1010, IR22, SK2046, SK2058, IR66, and Yabani LuLu, achieved the highest mean grain yields. Further stability analyses identified MTU1010 and Yabani LuLu as having stable yields across varying nitrogen environments, while IR22 demonstrated superior performance under unfavourable nitrogen conditions. These evaluated genotypes offer candidate materials for plant breeders aiming to develop varieties suited to lower nitrogen inputs.
Rice crops absorb less than half of applied nitrogen fertiliser, leading to economic inefficiency and environmental harm. Identifying specific rice varieties that maintain stable, high yields even under reduced fertiliser regimes can help secure food production while lowering the financial and ecological costs of intensive chemical fertilisation.
The identified varieties, notably MTU1010, IR22, and Yabani LuLu, can serve as parental lines or candidates for plant breeders establishing low-nitrogen crop programmes. Because these findings stem from applied field trials across multiple seasons, the genetic resources represent an applied stage of research that could feed into seed development pipelines for farmers seeking to reduce fertiliser usage.
AI-generated from the published abstract. Always read the original work before citing.
Sustainable agriculture is a prerequisite for food and environmental security. Chemical fertilization, especially nitrogenous fertilization, is considered the most consumed for field crops. In rice crops, plants consume much less than half of the applied N-fertilizer. In the current investigation, multiple N environments were generated by applying different N doses of urea fertilizer to a permanent transplanted field for two successive summer growing seasons at the rice research and training center, Kafrelsheikh, Egypt. A set of 55 genotypes consisting of 25 Jabonica, 4 Tropical Japonica, 20 Indica, and 6 Indica/Japonica were transplanted under no N (0N), Low N (LN), medium N (MN), and High N (HN) (i.e., 0, 48, 96, and 165 Kg N ha<sup>-1</sup>, respectively). Highly significant differences were detected among the tested genotypes. AMMI analysis of variance revealed the existence of the genotype via nitrogen interaction (GNI) on yield performance. The GNI principal components (IPCA); IPCA1 and IPCA2 scores were significant and contributed values of 71.1 and 21.7%, respectively. The highest-ranked genotypes were MTU1010, IR22, SK2046, SK2058, IR66, and Yabani LuLu based on their grain yield means (30.7, 29.9, 29.5, 29.3, 28.8, and 28.5 g plant<sup>-1</sup>). These genotypes were grouped into the same subcluster (SCL) according to the stability analysis ranking matrix. Based on AMMI analysis and biplots, MTU1010 and Yabani LuLu showed yield stability across environments. Meanwhile, the which-won-where biplot showed that IR22 was superior under unfavorable N-levels and MTU1010 was stable across the different environments. These findings are considered to be of great importance to breeders for initiating low-nitrogen-input breeding programs for sustainable agriculture.
This page summarises published work. The authoritative version sits with the publisher.
DOI: 10.3390/plants11202775
Is something wrong with this record? Report it or request removal.
Discussion
Have you built on this work, tried to replicate it, or seen it applied in practice? Share what you know. Verified researchers and MARATTO™ domain experts can open a discussion, and any member can reply. Contributions are reviewed before they appear.
No discussion yet. Open the first thread.
New to MARATTO™? Create a free account.
