Dataset Information

Assessment of productivity, nutrient uptake and economic benefits of rice under different nitrogen management strategies.

ABSTRACT:

Background

Integrating a chemical nitrogen (N) fertilizer with an organic fertilizer and using slow-release mechanism are important N management strategies to increase the N utilization efficiency (NUE) and grain yield of rice. However, the performances of both N management strategies on the productivity, the nutrient absorption and utilization efficiency, and the economic benefits of rice have not yet been comprehensively evaluated.

Methods

A 2-year field experiment was conducted with seven N management strategies without fertilizer (control), 100% conventional N fertilizer (conventional compound fertilizer and urea) (N₁₀₀), 75% conventional N fertilizer with 25% organic-inorganic compound fertilizer (N₇₅+OICF₂₅), 50% conventional N fertilizer with 50% organic-inorganic compound fertilizer (N₅₀+OICF₅₀), 100% organic-inorganic compound fertilizer (OICF₁₀₀), slow-release compound fertilizer with urea (SRCF+U), compound fertilizer with sulfur-coated urea (CF+SCU). The responses of the productivity, the nutrient absorption and utilization efficiency, and the economic benefits of rice to the different N management strategies were evaluated.

Results

CF+SCU performed comparably or better than N₁₀₀, judging by the grain yield (GY), the N, phosphate (P) and potassium (K) agronomic efficiency (NAE, PAE and KAE), and the apparent N, P and K recovery efficiency (ANRE, APRE and AKRE). SRCF+U significantly increased the GY by an average of 7.7%, the NAE and the ANRE by 23.8 and 26.7%, the PAE and the APRE by 90.6 and 109.3%, and the KAE and the AKRE by 74.2 and 57.7%. The higher GY and nutrient utilization efficiency when using SRCF+U were attributed to the higher total biomass and total nutrient absorption. N₇₅+OICF₂₅ and N₅₀+OICF₅₀ produced a comparable grain yield than N₁₀₀, whereas a significant yield reduction was observed when using OICF₁₀₀. Compared with N₁₀₀, N₇₅+OICF₂₅ resulted in a comparable or higher fertilizer use efficiency (0.3 and 4.7% for NAE and ANRE, 0.3 and 3.2% for PAE and APRE, 0.3 and -2.8% for KAE and AKRE). However, the fertilizer use efficiency when using N₅₀+OICF₅₀ and OICF₁₀₀ were lower than with N₁₀₀. The highest net return (NR) (5,845.03 yuan ha^-1) and benefit to cost (B:C) ratio (0.34) were obtained when using SRCF+U. The NR and the B:C ratio when using N₇₅+OICF₂₅ were slightly higher than when using N_100. However, N₅₀+OICF₅₀ and OICF₁₀₀ significantly decreased the NR and the B:C ratio compared with N₁₀₀ by 14.5 and 12.1% and by 35.1 and 29.0%, respectively.

Conclusions

SRCF+U and CF+SCU enhanced the crop productivity, the nutrient uptake and utilization efficiency, and the economic benefits compared with N_100. The comprehensive performance of SRCF+U was better than that of CF+SCU. N₇₅+OICF₂₅ produced almost similar productivity, nutrient uptake and use efficiency compared with N₁₀₀. It demonstrated that N₇₅+OICF₂₅ stabilized the grain yield production of rice and reduced the input of chemical N fertilizer.

SUBMITTER: Yang G

PROVIDER: S-EPMC7395599 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature

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Publications

Assessment of productivity, nutrient uptake and economic benefits of rice under different nitrogen management strategies.

Yang Guoying G Ji Hongting H Liu Hongjiang H Zhang Yuefang Y Chen Liugen L Zheng Jianchu J Guo Zhi Z Sheng Jing J

PeerJ 20200729

<h4>Background</h4>Integrating a chemical nitrogen (N) fertilizer with an organic fertilizer and using slow-release mechanism are important N management strategies to increase the N utilization efficiency (NUE) and grain yield of rice. However, the performances of both N management strategies on the productivity, the nutrient absorption and utilization efficiency, and the economic benefits of rice have not yet been comprehensively evaluated.<h4>Methods</h4>A 2-year field experiment was conducted ...[more]

PMID: 32821541

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Project description:BackgroundThe sustainability of paddy production systems in South Asia has recently been affected by a decline in soil health and excessive water usage. As a response to the global energy crisis, escalating costs of synthetic fertilisers, and growing environmental concerns, the utilization of organic plant-nutrient sources has gained considerable attention. Emerging adaptation technologies, including conservation tillage and innovative approaches to fertilizer management, present practical choices that can significantly contribute to the long-term preservation of soil fertility.MethodsThe two year-long field experiment was completed in sandy loam soil during rainy (Kharif) seasons in 2019 and 2020 at the crop research centre farm of Sardar Vallabhbhai Patel University of Agricultural & Technology, Meerut, Uttar Pradesh to analyze the impacts of different tillage establishment of the crop and its methodologies as well as integrated nutritional management approaches on rice growth, yield, productivity of water, nutrient uptake, and fertility status of soil under a rice-wheat rotation system. The experiment was set up in a factorial randomized block design and replicated three times in a semi-arid subtropical environment.ResultsThe conventionally transplanted rice puddled (CT-TPR) grew substantially better taller plants, and higher dry matter buildup leads to increased yields than transplanted rice under raised wide bed (WBed-TPR). WBed-TPR plots had more tillers, LAI, CGR, RGR, and yield characteristics of the rice in two year study. CT-TPR increased grain yield by 4.39 and 4.03% over WBed-TPR in 2019 and 2020, while WBed-TPR produced the highest water productivity (0.44 kg m-3) than CT-TPR, respectively. The 100% RDF+ ZnSO4 25 kg ha-1 + FYM (5 t ha-1) + PSB (5 kg ha-1) + Azotobacter 20 kg ha-1 (N6) treatment outperformed the other fertiliser management practices in terms of crop growth parameters, yields of grain (4,903 and 5,018 kg ha-1), nutrient uptake and NPK availability, organic soil carbon. Among the fertilizer management practices, with the direct applications of the recommended dose of fertilizer (RDF), farm yard manure (FYM), phosphate solubilizing bacteria (PSB), Azatobactor and zinc worked synergistically and increased grain yields by 53.4, 51.3, 47.9 and 46.2% over their respective control treatment.ConclusionsTo enhance rice productivity and promote soil health, the study suggests that adopting conservation tillage-based establishment practices and implementing effective fertilizer management techniques could serve as practical alternatives. It is concluded that the rice yield was improved by the inclusive use of inorganic fertiliser and organic manure (FYM). Additionally, the study observed that the combination of conventional puddled transplanted rice (CT-TPR) and N6 nitrogen application resulted in enhanced rice crop productivity and improved soil health.

Dataset Information

Assessment of productivity, nutrient uptake and economic benefits of rice under different nitrogen management strategies.

Background

Methods

Results

Conclusions

Publications

Assessment of productivity, nutrient uptake and economic benefits of rice under different nitrogen management strategies.

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