Effects of N fertilization and maize straw on the dynamics of soil organic N and amino acid N derived from fertilizer N as indicated by 15N labeling

Lu, Caiyan; Chen, Huaihai; Teng, Zhenzhen; Yuan, Ling; Ma, Jing; He, Hongbo; Chen, Xin; Zhang, Xudong

doi:10.1016/j.geoderma.2018.02.014

Cited by 48 publications

(18 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…We here reveal that short-term application of nitrogen fertilizers reduces protist diversity. In contrast to our hypothesis 2, straw amendments further lowered protist diversity, which could be attributed to the increased nitrogen retention under the straw incorporation in soil as demonstrated by 15 N-urea tracing in our trial field in the black soil [16] and other studies [41, 42]. Based on the data, we cannot decipher the specific underlying mechanisms of protist diversity decreases, such as through direct effects or via changes in abiotic or biotic components.…”

Section: Discussioncontrasting

confidence: 96%

Protist communities are more sensitive to nitrogen fertilization than other microorganisms in diverse agricultural soils

et al. 2019

View full text Add to dashboard Cite

Background Agricultural food production is at the base of food and fodder, with fertilization having fundamentally and continuously increased crop yield over the last decades. The performance of crops is intimately tied to their microbiome as they together form holobionts. The importance of the microbiome for plant performance is, however, notoriously ignored in agricultural systems as fertilization disconnects the dependency of plants for often plant-beneficial microbial processes. Moreover, we lack a holistic understanding of how fertilization regimes affect the soil microbiome. Here, we examined the effect of a 2-year fertilization regime (no nitrogen fertilization control, nitrogen fertilization, and nitrogen fertilization plus straw amendment) on entire soil microbiomes (bacteria, fungi, and protist) in three common agricultural soil types cropped with maize in two seasons. Results We found that the application of nitrogen fertilizers more strongly affected protist than bacterial and fungal communities. Nitrogen fertilization indirectly reduced protist diversity through changing abiotic properties and bacterial and fungal communities which differed between soil types and sampling seasons. Nitrogen fertilizer plus straw amendment had greater effects on soil physicochemical properties and microbiome diversity than nitrogen addition alone. Moreover, nitrogen fertilization, even more together with straw, increased soil microbiome network complexity, suggesting that the application of nitrogen fertilizers tightened soil microbiomes interactions. Conclusions Together, our results suggest that protists are the most susceptible microbiome component to the application of nitrogen fertilizers. As protist communities also exhibit the strongest seasonal dynamics, they serve as the most sensitive bioindicators of soil changes. Changes in protist communities might have long-term effects if some of the key protist hubs that govern microbiome complexities as top microbiome predators are altered. This study serves as the stepping stone to promote protists as promising agents in targeted microbiome engineering to help in reducing the dependency on exogenous unsustainably high fertilization and pesticide applications. Electronic supplementary material The online version of this article (10.1186/s40168-019-0647-0) contains supplementary material, which is available to authorized users.

show abstract

Section: Discussioncontrasting

confidence: 96%

Protist communities are more sensitive to nitrogen fertilization than other microorganisms in diverse agricultural soils

et al. 2019

View full text Add to dashboard Cite

show abstract

“…However, organic rice has shown a lower or similar level of amino acids than conventional rice [ 63 , 64 ]. 15N-labeled tracer techniques showed that combined application of chemical and organic fertilizers significantly increased the percentages of organic N and amino acid N [ 65 ]. The release of N from organic fertilizers partially contributed to increased amino acid accumulation.…”

Section: Resultsmentioning

confidence: 99%

Green Labelled Rice Shows a Higher Nutritional and Physiochemical Quality Than Conventional Rice in China

Zhong

Zhang

et al. 2021

Foods

View full text Add to dashboard Cite

In China, green food refers to a wide array of certified agricultural and processed edible commodities that are produced strictly following defined standard protocols and labelled with a specified “Green Food” logo. The demand for green labelled rice is rapidly growing due to its higher quality and adherence to safety standards compared to conventional rice. Therefore, the physicochemical and nutritional quality of green rice needs to be further investigated for consumers’ benefits. Using Daohuaxiang 2, one of the most famous types of green rice, we found that green rice was significantly superior to conventional rice in terms of thousand kernel weight, chalkiness, amylose content, and rheological properties. Green rice contained lower levels of heavy metals than conventional rice due to a dramatic reduction in chemical inputs during its cultivation. The concentrations of Cr, As, Cd, Pb in green rice decreased, respectively, from 98.7 to 180.1 μg/kg, 49.8 to 62.3 μg/kg, 7.8 to 9.1 μg/kg, and 29.0 to 42.8 μg/kg on average. Gas chromatography coupled with mass spectrometry (GC–MS)-based metabolomics, in combination with multivariate analysis, revealed that 15 metabolites differentially accumulated when comparing green and conventional rice. Among these, 12 metabolites showed a high accumulation in green rice, including seven amino acids, two sugars, and three fatty acids. Overall, our results suggest the superior quality of a type of green rice that is popular in China, which may boost green rice consumption and facilitate the further expansion of green rice production in China.

show abstract

“…6). Prior studies have reported that, following maize stover mulching, more organic N, amino acid N, and amino sugar N were observed in soil(33, 34), which increased the retention time of nitrogen, hence meeting the nutrient requirement of corn growth and reducing nitrate loss to underground water. The increased available nitrogen, labile carbon and water in deep soil under NTSM can increase the resilience and resistance of maize to disturbances with higher grain production (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…6). Prior studies have reported that, following maize stover mulching, more organic N, amino acid N, and amino sugar N were observed in soil(Liu et al ., 2016; Lu et al ., 2018), combining with higher genes related to amino acid metabolism and carbohydrate metabolism from function predication analyses (Fig. S3), jointly hint that NTSM increased the retention time of nitrogen, hence meeting the nutrient requirement of corn growth and reducing nitrate loss to underground water.…”

Section: Discussionmentioning

confidence: 99%

Low-disturbance Farming Regenerates Healthy Deep Soil towards Sustainable Agriculture

Deng

Wang

Xie

et al. 2019

Preprint

Self Cite

View full text Add to dashboard Cite

SummaryIntensive conventional farming has degraded farmland topsoil and seriously threaten food and environment security globally. Although low-disturbance practices have been widely adapted to restore soil health, whether this measure in a long run can potentially recover the critical deep soil to meet sustainable intensification of crop production are still unclear. Here we compared soil microbiome, physiochemical parameters along 3-m deep soil profiles, and crop yield in Northeast China subjected to ten years of farming practices at 3 levels of disturbance, including conventional tillage (CT), no-tillage without stover mulching (NTNS), and no-tillage with stover mulching (NTSM). We found that low-disturbance practices (NTNS and NTSM) promoted the ability of the deep soil to retain water and nitrogen, regenerated whole-soil microbial diversity and function, and significantly improved corn yield in the drought year. This study implies that the low-disturbance practices could dig deeper for agricultural resource and reduce energy consumption and greenhouse gas emissions, thus regenerating highly efficient, sustainable agriculture.Science for SocietyBy 2050, how to feed 10 billion people on limited land without destroying the environment has become a global challenge. Prior research has shown that low-disturbance farming enhances biodiversity and natural biological processes in farmland topsoil, which benefit crop production. However, whether long-term low-disturbance farming could regenerate deep-soil health to meet sustainable intensification of crop production remains unclear. We evaluate the impact of low-disturbance practices on 3-meter soil profile after 10-year manipulations and provide an underneath mechanism on how long-term low-disturbance farming regenerate deep healthy soil. We found that low-disturbance farming not only promoted soil nutrient and water holding capacities, restored microbial diversity, richness, and ecological function in the whole 3-m soil profile, but also improved crop production (especially during drought) and potentially reduced energy consumption and greenhouse gas emissions, thus promoting sustainable agriculture and ensuring food and environment security.Graphical Abstract

show abstract

Effects of N fertilization and maize straw on the dynamics of soil organic N and amino acid N derived from fertilizer N as indicated by 15N labeling

Cited by 48 publications

References 53 publications

Protist communities are more sensitive to nitrogen fertilization than other microorganisms in diverse agricultural soils

Protist communities are more sensitive to nitrogen fertilization than other microorganisms in diverse agricultural soils

Green Labelled Rice Shows a Higher Nutritional and Physiochemical Quality Than Conventional Rice in China

Low-disturbance Farming Regenerates Healthy Deep Soil towards Sustainable Agriculture

Contact Info

Product

Resources

About