Responses of soil carbon, nitrogen, and wheat and maize productivity to 10 years of decreased nitrogen fertilizer under contrasting tillage systems

Liu, Zhen; Sun, Kai; Liu, Wentao; Gao, Tianping; Li, Geng; Han, Huifang; Li, Zengjia; Ning, Tangyuan

doi:10.1016/j.still.2019.104444

Cited by 47 publications

(33 citation statements)

References 63 publications

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“…These changes would affect the microbial community composition, directly impacting SOC decomposition rate and microbial biomass dynamics (Liu et al, 2014). In addition, an increase in the higher nitrogen fertilizer input rate (NFI) would increase plant growth, aboveground crop residues, belowground biomass, and nitrogen availability for soil microorganisms (Geisseler & Scow, 2014; Liu et al, 2020). Such conditions might enhance soil aggregation and SOC accumulation in aggregates under NT, due to the higher amount of fresh organic material inputs and soil microbial biomass (Figures 2–4) (Bhattacharyya et al, 2012; Sun, Feng, et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

A global meta‐analysis of the impacts of no‐tillage on soil aggregation and aggregate‐associated organic carbon

Liu

Liang

et al. 2021

Land Degrad Dev

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No‐tillage (NT) has been shown to control soil degradation by impacting soil aggregates (i.e., basic units of soil structure, whose characteristics mediate key soil processes, like carbon sequestration). However, there has been no systematic analysis of the impacts of NT on soil aggregation and aggregate‐associated soil organic carbon (SOC) at global level. We conducted a global meta‐analysis of 89 publications to elucidate the changes in soil aggregation and aggregate‐associated SOC under NT. Notably, we quantified the roles of diverse environmental and agronomic factors (e.g., climatic conditions, experimental duration, cropping intensity, soil texture, and initial SOC/pH) in the changes in those variables. Relative to conventional tillage (CT), NT significantly increased the proportions of water‐stable large (LM) and small (SM) macro‐aggregates and the mean weight diameter (MWD) (by 49%, 11%, and 23%, respectively) but decreased the proportions of micro‐aggregates (MIC) and silt plus clay‐size particles (SC) (by 11% and 16%, respectively). NT significantly enhanced SOC concentrations in LM (17%), SM (14%), MIC (10%), and SC (7%) compared to CT. Furthermore, the random forest (RF) model demonstrated that climatic conditions, experimental duration, and soil texture were the predominant factors controlling the changes in aggregation and aggregate‐associated SOC under NT. Overall, our results indicate that NT is an effective strategy to enhance soil aggregation and aggregate‐associated SOC, yet variations in responses are determined by specific environmental/agronomic factors. This study provided a basis for identifying site‐specific NT practice that could help improve soil structure and SOC sequestration, ultimately controlling soil degradation in croplands.

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Section: Discussionmentioning

confidence: 99%

A global meta‐analysis of the impacts of no‐tillage on soil aggregation and aggregate‐associated organic carbon

Liu

Liang

et al. 2021

Land Degrad Dev

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“…Our results showed that MBC content increased with increasing N application between N100 and N250. Nitrogen application at 300 kg ha À1 decreased MBC content because such excess N fertilizer disrupts the soil microorganism environment and reduces their activity (Liu et al 2020).…”

Section: Discussionmentioning

confidence: 99%

“…Guo et al (2016) found that excess N application decreased soil pH in crop production areas in China by 0.5 units from 1980 to 2000, resulting in soil acidification and reduced production of organic matter (Liang et al 2013;Wang et al 2021a). Reducing N application can, in the long term, reduce input costs and be more environmentally friendly while maintaining sustainable yields in agricultural production (Liu et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Stover return and nitrogen application affect soil organic carbon and nitrogen in a double‐season maize field

et al. 2021

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Cultivation techniques have an important influence on grain yield of maize. This experiment investigated the effect of stover return (SR) and different nitrogen (N) application rate on soil organic carbon (SOC) composition, soil nutrient and maize yield.• Different nitrogen application rate 100 (N100), 150 (N150), 200 (N200), 250 (N250) or 300 (N300) kg ha À1 applied to the maize field with stover return and without stover return traditional planting (TP) method.• Nitrogen application rate and stover return affected the SOC, labile organic carbon (LOC), microbial biomass (MBC), NO 3 À -N, NH 4 + -N and maize yield. Soil N, soil carbon content and maize yield of SR were all higher than TP. The SOC content of SR and TP were 9.67 and 9.19 g kg À1 , respectively. Nitrogen application was significantly and positively correlated with soil MBC, LOC, SOC, NO 3 À -N, NH 4 + -N and yield. The maximum values of SOC composition, soil nutrients and maize yield were reached at SR with 250 kg ha À1 .• Stover return with application of N 250 kg ha À1 significantly increased the growth attribute and maize yield in subtropical region compared with traditional planting.

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“…Nitrogen (N) is a major driver in crop production, but too much nitrogen is harmful for the ecosystems and potentially also to human health [1]. Nitrogen management in agriculture aims to achieve agronomic objectives (farm income, high crop and livestock productivity) and environmental objectives (minimal N losses) simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Efficiency of Mineral Nitrogen Fertilization in Winter Wheat under Pannonian Climate Conditions

et al. 2020

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Improvements in nitrogen (N) use efficiency in crop production are important for addressing the triple challenges of food security, environmental degradation and climate change. The three fertilizers, calcium ammonium nitrate (CAN), urea (Urea) and stabilized urea (Ureastab), were applied at a rate of 160 kg N ha−1 with two or three splits to winter wheat (Triticum aestivum L.) in the Pannonian climate region of eastern Austria. On average, over all fertilization treatments, the grain yield (GY) increased by about a quarter and the grain N concentration (GNC) doubled compared to the control without fertilization. Consequently, the grain N yield (NYGRAIN) was increased with N fertilization by 154%. The GY increased due to a higher grain density with no differences between N fertilizers but with a tendency of a higher grain yield with three compared to two splits. Three splits also slightly increased the GNC and consequently the NYGRAIN of CAN and Ureastab in one year. The removal of N fertilizer with the NYGRAIN (N surplus) was higher than the amount of applied fertilizer. Fertilization decreased the N use efficiency (NUE), the N uptake efficiency (NUpE) and the N utilization efficiency (NUtE) but increased the soil mineral nitrate (NO3-N) at harvest and the apparent N loss (ANL). Three compared to two applications resulted in a higher NO3-N at harvest but also a lower N surplus due to partly higher NYGRAIN. Consequently, the ANL was lower with three compared to two splits. Also, the NUpE and the apparent N recovery efficiency (ANRE) were higher with three splits. The best N treatment regarding highest above-ground biomass yield with lowest N surplus, N balance and ANL was the three-split treatment (50 CAN, 50 CAN, 60 liquid urea ammonium nitrate). Three splits can, under semi-arid conditions, be beneficial when aiming high-quality wheat for bread-making and also for reducing the N loss. Whereas, two splits are recommended when aiming only at high GY, e.g., for ethanol-wheat production.

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Responses of soil carbon, nitrogen, and wheat and maize productivity to 10 years of decreased nitrogen fertilizer under contrasting tillage systems

Cited by 47 publications

References 63 publications

A global meta‐analysis of the impacts of no‐tillage on soil aggregation and aggregate‐associated organic carbon

A global meta‐analysis of the impacts of no‐tillage on soil aggregation and aggregate‐associated organic carbon

Stover return and nitrogen application affect soil organic carbon and nitrogen in a double‐season maize field

Efficiency of Mineral Nitrogen Fertilization in Winter Wheat under Pannonian Climate Conditions

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