Calculation of theoretical nitrogen rate for simple nitrogen recommendations in intensive cropping systems: A case study on the North China Plain

Ju, Xiaotang; Christie, Peter

doi:10.1016/j.fcr.2011.08.002

Cited by 107 publications

(48 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Crop nutrient uptake and crop yield are the primary factors determining optimal fertilization practices [9]. However, seed yields are highly variable in winter oilseed rape production, depending on the crop rotations [3,10].…”

Section: Introductionmentioning

confidence: 99%

Crop rotation-dependent yield responses to fertilization in winter oilseed rape (Brassica napus L.)

Ren¹,

Li²,

Lü³

et al. 2015

The Crop Journal

View full text Add to dashboard Cite

Differences in soil physical, chemical and biological properties between paddy-upland and continuous upland rotations will influence nutrient relations and crop growth. With the aim of estimating rapeseed yield performance in response to fertilization in rice-rapeseed (RR) and cotton-rapeseed (CR) rotations, on-farm experiments were conducted at 70 sites across Hubei province, central China. The economically optimal fertilizer rates of winter oilseed rape in different rotations were determined. Field experiments showed that previous crops significantly influenced seed yields. Without N fertilization, seed yields were significantly lower for the RR rotation than for the CR rotation. The average yield increase ratio and agronomic efficiency associated with nitrogen (N) fertilization in the RR rotation were 96.6% and 6.56 kg kg −1 , significantly higher than those in the CR rotation. No seed yield differences were detected between the two rotations under phosphorus (P) and potassium (K) fertilization. In contrast to the CR rotation, N fertilizer played a more vital role in maintaining high seed yields in the RR rotation owing to the lower indigenous soil N supply. Compared with local N fertilizer recommendation rates for the RR rotation, on average an additional 18 kg N ha −1 was recommended according to the economically optimal N fertilizer rate (EONFR). In contrast, the EONFR was 14 kg N ha −1 lower than the locally recommended N fertilizer rate for the CR rotation. There were no differences between the two rotations for the average economically optimal P and K fertilization rates.Consequently, the average EONFR of winter oilseed rape could be reduced if cotton rather than rice preceded the winter oilseed rape.Please cite this article as: T. Ren, et al., Crop rotation-dependent yield responses to fertilization in winter oilseed rape (Brassica napus L.), The Crop Journal (2015), http://dx.

show abstract

Section: Introductionmentioning

confidence: 99%

Crop rotation-dependent yield responses to fertilization in winter oilseed rape (Brassica napus L.)

Ren¹,

Li²,

Lü³

et al. 2015

The Crop Journal

View full text Add to dashboard Cite

show abstract

“…Our recent work based on long-term intensively managed cropping systems in China shows that the optimum N rate for a crop approximates aboveground crop N removal (28). Applying this N balance concept would suggest that N fertilizer use nationally could be reduced by 42% from current use.…”

Section: −1mentioning

confidence: 99%

New technologies reduce greenhouse gas emissions from nitrogenous fertilizer in China

Zhang

Dou

et al. 2013

Proc. Natl. Acad. Sci. U.S.A.

698

344

View full text Add to dashboard Cite

Synthetic nitrogen (N) fertilizer has played a key role in enhancing food production and keeping half of the world's population adequately fed. However, decades of N fertilizer overuse in many parts of the world have contributed to soil, water, and air pollution; reducing excessive N losses and emissions is a central environmental challenge in the 21st century. China's participation is essential to global efforts in reducing N-related greenhouse gas (GHG) emissions because China is the largest producer and consumer of fertilizer N. To evaluate the impact of China's use of N fertilizer, we quantify the carbon footprint of China's N fertilizer production and consumption chain using life cycle analysis. For every ton of N fertilizer manufactured and used, 13.5 tons of CO 2 -equivalent (eq) (t CO 2 -eq) is emitted, compared with 9.7 t CO 2 -eq in Europe. Emissions in China tripled from 1980 [131 terrogram (Tg) of CO 2 -eq (Tg CO 2 -eq)] to 2010 (452 Tg CO 2 -eq). N fertilizer-related emissions constitute about 7% of GHG emissions from the entire Chinese economy and exceed soil carbon gain resulting from N fertilizer use by several-fold. We identified potential emission reductions by comparing prevailing technologies and management practices in China with more advanced options worldwide. Mitigation opportunities include improving methane recovery during coal mining, enhancing energy efficiency in fertilizer manufacture, and minimizing N overuse in field-level crop production. We find that use of advanced technologies could cut N fertilizer-related emissions by 20-63%, amounting to 102-357 Tg CO 2 -eq annually. Such reduction would decrease China's total GHG emissions by 2-6%, which is significant on a global scale.carbon accounting | life cycle assessment | food security | policy

show abstract

“…During 2005-2007, an on-farm study also implied that optimal N fertilization decreased from 369 to 117 kg N ha −1 yr −1 without yield loss during wheat growing season, together with a reduction in N loss from 123 to 30 kg N ha −1 yr −1 in the North China Plain (Cui et al, 2011). According to quantitative relationships among core N fluxes in the crop root zone, the suitable N fertilization rate is 60% of the conventional rate in the North China Plain (Ju and Christie, 2011). These results are consistent with our estimation that the annual N fertilization in the FR scenario could be reduced by 35% compared to the CS scenario in the North China Plain.…”

Section: N Fertilization Amountmentioning

confidence: 99%

Status of mineral nitrogen fertilization and net mitigation potential of the state fertilization recommendation in Chinese cropland

Zhang

Wang

Sun

et al. 2016

Agricultural Systems

View full text Add to dashboard Cite

The overuse of mineral nitrogen (N) fertilizer is widespread and affects greenhouse gas (GHG) emission in China. In 2013, the Ministry of Agriculture released the 'Recommendation for soil nutrient analysis-based mineral fertilizer application for corn, wheat and rice' (hereafter the Recommendation). The aims of this study were to estimate current mineral N fertilization and net mitigation potential (NMP) for the Recommendation in the three main crops in China. To estimate the NMP from the Recommendation concerning the fertilizer recommendation (FR) scenario, we designed a current situation (CS) scenario by conducting a field questionnaire survey across typical cropping regions in China. Our results indicate that annual N fertilization amount was 19.1 ± 1.2 (95% confidence interval) Mt N applied to the 66 M ha of Chinese cropland in the CS scenario and would decrease by about 7.1 Mt N in the FR scenario. This decrease might mitigate 37.4 ± 5.2% of GHG emissions including carbon dioxide (CO 2 ) from production and transport of N fertilizer, and nitrous oxide from soil due to N fertilization. Carbon (C) sequestration was 11.1 ± 0.71 Tg C yr −1 under both scenarios. The NMP was 23.9 ± 3.4 Tg Ceq yr −1 in the FR scenario and might offset 1.1 ± 0.16% of CO 2 emissions from fossil fuel combustion in 2011 in China. In conclusion, implementation of the Recommendation could be a sustainable and cost-effective N management system to mitigate GHG emissions in Chinese cropland.

show abstract

Calculation of theoretical nitrogen rate for simple nitrogen recommendations in intensive cropping systems: A case study on the North China Plain

Cited by 107 publications

References 35 publications

Crop rotation-dependent yield responses to fertilization in winter oilseed rape (Brassica napus L.)

Crop rotation-dependent yield responses to fertilization in winter oilseed rape (Brassica napus L.)

New technologies reduce greenhouse gas emissions from nitrogenous fertilizer in China

Status of mineral nitrogen fertilization and net mitigation potential of the state fertilization recommendation in Chinese cropland

Contact Info

Product

Resources

About