Optimization of nitrogen fertilizer rate under integrated rice management in a hilly area of Southwest China

Dong, Yujiao; Jiang, Yuan; Zhang, Guangbin; Ma, Jing; Hilario, Padilla; Liu, Xuejun; Lu, Shouxiang

doi:10.1016/s1002-0160(20)60036-4

Cited by 11 publications

(6 citation statements)

References 42 publications

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“…reported that rice growth and grain yield increase when 50% of the total nitrogen input is applied as basal fertilizer, with the rest being top‐dressed. Optimizing nitrogen management by modifying the total nitrogen input and top‐dressing increases rice grain yield and NUE 14,34,35 . In this study, SNRP was established for direct‐seeded rice.…”

Section: Discussionmentioning

confidence: 99%

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Improving grain yield and nitrogen use efficiency of direct‐seeded rice with simplified and nitrogen‐reduced practices under a double‐cropping system in South China

Nongrong

Zhong

et al. 2023

J Sci Food Agric

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Background Enhancing grain yield and nitrogen use efficiency (NUE) of rice is of great importance for sustainable agricultural development. Little effort has been made to increase grain yield and NUE of direct‐seeded rice under the double‐cropping system in South China. Field trials were conducted during 2018–2020 with four treatments, including nitrogen‐free, farmers' fertilization practice (FP), ‘three controls’ nutrient management (TC), and simplified and nitrogen‐reduced practice (SNRP). Results Grain yield under SNRP averaged 6.46 t ha−1 during the three years and was 23.0% higher than that of FP but comparable to that of TC. Recovery efficiency (REN), agronomic efficiency (AEN), and partial factor productivity (PFPN) of nitrogen under SNRP increased by 12.0–22.7%, 159.3–295.0% and 94.6–112.5% respectively compared with FP. Harvest index and sink capacity increased by 7.3–10.8% and 14.9–21.3% respectively. Percentage of productive tillers (PPT) and biomass after heading increased by 24.0% and 104.5% respectively. Leaf nitrogen concentration at heading and nitrogen accumulation after heading increased by 16.3% and 842.0% respectively. Grain yield was positively correlated with PPT, sink capacity, harvest index, biomass and nitrogen accumulation after heading, REN, AEN, and PFPN. Conclusion Grain yield and NUE under SNRP were superior to those under FP and comparable to those under TC. Increase in sink capacity, higher PPT, more biomass and nitrogen accumulation after heading, and greater harvest index were responsible for high grain yield and NUE in SNRP with reduced nitrogen fertilizer and labor input. SNRP is a feasible approach for direct‐seeded rice under a double‐cropping system in South China. © 2023 Society of Chemical Industry.

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Section: Discussionmentioning

confidence: 99%

“…Optimizing nitrogen management by modifying the total nitrogen input and top-dressing increases rice grain yield and NUE. 14,34,35 In this study, SNRP was established for directseeded rice. The total nitrogen input under SNRP decreased by more than 30% and 9% compared with FP and TC respectively.…”

Section: Discussionmentioning

confidence: 99%

Improving grain yield and nitrogen use efficiency of direct‐seeded rice with simplified and nitrogen‐reduced practices under a double‐cropping system in South China

Nongrong

Zhong

et al. 2023

J Sci Food Agric

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“…Nitrogen (N) is considered to be one of the major factors affecting crop growth ( Abbruzzini et al, 2019 ). China is the world’s largest consumer of fertilizer ( Cui et al, 2021 ), and ranks in the highest position for N application in the world ( Dong et al, 2020 ). However, the unbalanced relationship between intensive application of chemical nitrogen fertilizer and crop nitrogen requirement leads to low efficiency of N fertilizer.…”

Section: Introductionmentioning

confidence: 99%

DOM hydrophilic components of organic fertilizers increased the soil nitrogen retention capacity and succession of the microbial community

Wang,

Ge,

Deng

et al. 2023

Front. Microbiol.

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IntroductionApplication of organic fertilizers affects soil properties and microbial communities, which in turn alters soil N transformation processes. Unfortunately, it is not clear how the difference in the character of the organic fertilizer DOM affects the soil nitrogen retention capacity and its microbial processes.MethodsAccording to the principle of equal nutrients, the treatments of chemical fertilizer alone (treatment CF), chemical fertilizer with organic fertilizer DOM hydrophilic components (treatment H), and chemical fertilizer with organic fertilizer DOM hydrophobic components (treatment P) were set up, where the characteristics of soil nitrogen transformation and changes in microbial community structure were studied with soil culture conditions for 24 days.ResultsIt was discovered that the addition of organic fertilizer DOM components (H and P) slowed nitrification rate and increased protease activity resulting in a higher NH4+-N content compared to the CF treatment. The DOM addition (H and P) increased the microbial biomass nitrogen (MBN) levels in the soil and increased the soil nitrogen pool capacity.ConclusionsMoreover, the carbon use efficiency of the hydrophilic components is higher than that of the hydrophobic components, resulting in its further increase in nitrogen reservoir capacity and higher nitrogen retention capacity. Network analysis showed that the addition of organic fertilizer DOM hydrophilic components increased network complexity and synergy between microorganisms. In combination with random forest analysis, it was shown that Sphingomonas and Massilia were key species influencing soil nitrogen retention capacity and nitrogen availability characteristics.

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“…Wang et al (2019) found optimizing the way of farmers' typical fertilization can save fertilizer and increase the yield. A five-year field experiment showed that using integrated management optimized N fertilizer application rate which had highest NUE and yield (Dong et al, 2020). Yu et al (2006) found that a reduction of 25% of current water and N applications in the North China Plain reduced N leaching by 24%-77% with crop yield reduction of 1%-9%, and Fang et al (2018) found that potential savings of more than 30% of the N application rates from 300 to 200 kg N ha −1 could reduce about 60% of the N leaching without compromising crop yield.…”

Section: Introductionmentioning

confidence: 99%

Optimizing field management to promote the ecologicalization of agriculture in loess hilly-gully region, China

Huang

Liu

2023

J. Geogr. Sci.

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Scientific field management is an important path to realize ecological production and sustainable development of agriculture. As the main content of field management, nitrogen (N) management is the key to balance the economic and ecological benefits of agricultural production. In the loess hilly-gully region, for the fragile ecological and social system, ecologicalization of agricultural production is an important direction to promote sustainable agricultural development. However, irrational fertilization has been one of the main constraint factors, hindering the ecologicalization of local agriculture. In order to solve the problem and prove the practical significance of field management to ecologicalization of agriculture, this study aimed at evaluating the effects of different N fertilization rates and timing using Root Zone Water Quality Model (RZWQM) and then optimizing the N management. Experiments were conducted from 2018 to 2019 in Yangjuangou watershed, loess hilly-gully region, to calibrate and validate the model. The root mean square error (RMSE) of soil water content, nitrate N concentration, above-ground biomass, leaf area index ranged from 10.5-13.5 mm, 2.96-3.80 mg•kg -1 , 730.3-1273.9 kg•ha -1 and 0.26-0.38, respectively, with the agreement index (d) between observed and simulated values ranging between 0.88 to 0.98. Simulation results showed that N leaching in semi-arid areas was also quite high due to concentrated rainfall and loose soil, which had previously been neglected. When the fertilization rate decreased by 35% (applying the chemical fertilizer at rate of 245.7 kg N ha -1 ) of typical fertilization (applying the chemical fertilizer at rate of 378.0 kg N ha -1 ), the leaching and residual N decreased by 72.2%-75.4% and 35.6%-50.9%, respectively, while NUE increased by 41.5%-45.2% with no reduction in maize yield. Additionally, compared with applying additional N at seedling stage in one batch, applying at seedling and jointing stages in two batches further decreased N leaching and improved NUE. Thus, a 35% reduction of typical fertilization rate combined with applying additional N at seedling and jointing stages is recommended. From the perspective of N management, this study demonstrated optimizing field

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Optimization of nitrogen fertilizer rate under integrated rice management in a hilly area of Southwest China

Cited by 11 publications

References 42 publications

Improving grain yield and nitrogen use efficiency of direct‐seeded rice with simplified and nitrogen‐reduced practices under a double‐cropping system in South China

Improving grain yield and nitrogen use efficiency of direct‐seeded rice with simplified and nitrogen‐reduced practices under a double‐cropping system in South China

DOM hydrophilic components of organic fertilizers increased the soil nitrogen retention capacity and succession of the microbial community

Optimizing field management to promote the ecologicalization of agriculture in loess hilly-gully region, China

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