Deep tillage and nitrogen do not remediate cumulative soil deterioration effects of continuous cropping

AbstractNegative plant-soil feedbacks lead to the poor growth of Panax notoginseng (Sanqi), a well-known herb in Asia and has been used worldwide, under continuous cropping. However, the key soil parameters causing the replant problem are still unclear. Here we conducted a field experiment after 5-year continuous cropping. Sanqi seedlings were cultivated in 7 plots (1.5 m × 2 m), which were randomly assigned along a survival gradient. In total, 13 important soil parameters were measured to understand their relationship with Sanqi’s survival. Pearson correlation analysis showed that 6 soil parameters, including phosphatase, urease, cellulase, bacteria/fungi ratio, available N, and pH, were all correlated with Sanqi’s survival rate (P < 0.05). Principal component analysis (PCA) indicated that they explained 61% of the variances based on the first component, with soil pH being closely correlated with other parameters affecting Sanqi’s survival. The optimum pH for Sanqi growth is about 6.5, but the mean soil pH in the study area is 5.27 (4.86–5.68), therefore it is possible to ameliorate the poor growth of Sanqi by increasing soil pH. This study may also help to reduce the replant problem of other crops under continuous cropping since it is widespread in agricultural production.

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Variations of microbial community in Aconitum carmichaeli Debx. rhizosphere soilin a short-term continuous cropping system

The Journal of Microbiology ◽

10.1007/s12275-021-0515-z ◽

2021 ◽

Vol 59 (5) ◽

pp. 481-490

Author(s):

Xia Fei ◽

Wang Lina ◽

Chen Jiayang ◽

Fu Meng ◽

Wang Guodong ◽

...

Keyword(s):

Microbial Community ◽

Cropping System ◽

Continuous Cropping ◽

Short Term ◽

Continuous Cropping System ◽

Aconitum Carmichaeli

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Variation of rhizosphere microbial community in continuous mono-maize seed production

Scientific Reports ◽

10.1038/s41598-021-81228-1 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Yunchen Zhao ◽

Wenjiang Fu ◽

Changwei Hu ◽

Guangquan Chen ◽

Zhanwen Xiao ◽

...

Keyword(s):

Microbial Community ◽

Seed Production ◽

Disease Incidence ◽

Bacterial Species ◽

Curvularia Lunata ◽

Continuous Cropping ◽

Maize Seed ◽

Bacterial Phyla ◽

Soil Microbial ◽

Pathogen Invasion

AbstractSoil microbe is crucial to a healthy soil, therefore its diversities and abundances under different conditions are still need fully understand.The aims of the study were to characterize the community structure and diversity of microbe in the rhizosphere soil after continuous maize seed production, and the relationship between the disease incidence of four diseases and the variation of the rhizosphere microbe. The results showed that different fungal and bacterial species were predominant in different cropping year, and long-term maize seed production had a huge impact on structure and diversity of soil microbial. Ascomycota and Mortierellomycota were the dominant fungal phyla and Mortierella and Ascomycetes represented for a large proportion of genus. A relative increase of Fusarium and Gibberella and a relative decrease of Mortierella, Chrysosporium, Podospora, and Chaetomium were observed with the increase of cropping year. Pathogenic Fusarium, Curvularia, Curvularia-lunata, Cladosporium, Gibberella-baccata, and Plectosphaerellaceae were over-presented and varied at different continuous cropping year, led to different maize disease incidence. Proteobacteria and Actinobacteria ranked in the top two of all bacterial phyla, and genus Pseudarthrobacter, Roseiflexus and RB41 dominated top 3. Haliangium and Streptomyces decreased with the continuous cropping year and mono-cropping of maize seed production increased disease incidence with the increase of cropping year, while the major disease was different. Continuous cropping of maize seed production induced the decrease of protective microbe and biocontrol genera, while pathogenic pathogen increased, and maize are in danger of pathogen invasion. Field management show great effects on soil microbial community.

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Continuous Cropping, Fertilization, and Organic Manure Application Effects on Potassium in an Alfisol under Arid Conditions

Communications in Soil Science and Plant Analysis ◽

10.1080/00103620903565993 ◽

2010 ◽

Vol 41 (6) ◽

pp. 783-796 ◽

Cited By ~ 11

Author(s):

Ch. Srinivasarao ◽

K. P. R. Vittal ◽

Sumanta Kundu ◽

P. N. Gajbhiye ◽

M. Vijayasankar Babu

Keyword(s):

Organic Manure ◽

Continuous Cropping ◽

Manure Application ◽

Arid Conditions

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Assessing the economic viability of integrated crop−livestock systems in Mato Grosso, Brazil

Renewable Agriculture and Food Systems ◽

10.1017/s1742170519000280 ◽

2019 ◽

Vol 35 (6) ◽

pp. 631-642 ◽

Cited By ~ 1

Author(s):

Júlio César dos Reis ◽

Mariana Y. T. Kamoi ◽

Daniel Latorraca ◽

Rafael F. F. Chen ◽

Miqueias Michetti ◽

...

Keyword(s):

Beef Cattle ◽

Production System ◽

Net Present Value ◽

Livestock Grazing ◽

Economic Viability ◽

Continuous Cropping ◽

Cattle Production ◽

Study Region ◽

Mato Grosso ◽

Livestock Systems

AbstractPopulation growth and rising incomes have led to increasing global demand for meat products. Meeting this demand without converting remaining natural ecosystems or further degrading ecosystems is one of the largest global sustainability challenges. A critical step to overcoming this challenge is to increase the productivity of livestock grazing systems, which occupy the largest land area of any type of agriculture globally. Integrated crop−livestock systems (iCL), which re-couple crop and livestock production at the farm scale, have been considered a promising strategy to tackle this challenge by restoring degraded pasturelands and providing supplemental nutrition to livestock. However, few studies have analyzed the economic viability of such systems, especially in Brazil, an important player in global food systems. This paper presents an economic analysis of iCL in Mato Grosso, Brazil, the largest grain and beef producer in the country, which spans the ecologically diverse Amazon, Cerrado and Pantanal biomes. We compare the economic performance of an integrated soybean/corn and beef cattle system to a continuous crop (soybean/corn) system and a continuous livestock (beef cattle) production system from 2005 to 2012. We use empirical case study data to characterize a ‘typical’ farm for each production system within the study region. We find that the integrated crop−livestock system has a higher annual net present value (NPV) per hectare (ha) than continuous cropping or livestock under a range of discount rates. However, under a scenario of substantially higher crop prices, the continuous cropping outperforms iCL. While iCL is not feasible in all regions of the Amazon and Cerrado, our results indicate that in places where the biophysical and market conditions are suitable for production, it could be a highly profitable way to intensify cattle production and potentially spare land for other uses, including conservation. Nevertheless, additional credit and technical support may be needed to overcome high upfront costs and informational barriers to increase iCL areas as a sustainable development strategy for agriculture in the Amazon and Cerrado regions.

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