Long-term continuous cropping of soybean is comparable to crop rotation in mediating microbial abundance, diversity and community composition

Abstract. Warming of the Arctic led to an increase of permafrost temperatures by about 0.3 °C during the last decade. Permafrost warming is associated with increasing sediment water content, permeability and diffusivity and could on the long-term alter microbial community composition and abundance even before permafrost thaws. We studied the long-term effect (up to 2500 years) of submarine permafrost warming on microbial communities along an onshore-offshore transect on the Siberian Arctic Shelf displaying a natural temperature gradient of more than 10 °C. We analysed the in-situ development of bacterial abundance and community composition through total cell counts (TCC), quantitative PCR of bacterial gene abundance and amplicon sequencing, and correlated the microbial community data with temperature, pore water chemistry and sediment physicochemical parameters. On time-scales of centuries, permafrost warming coincided with an overall decreasing microbial abundance while millennia after warming microbial abundance was similar to cold onshore permafrost and DOC content was least. Based on correlation analysis TCC unlike bacterial gene abundance showed a significant rank-based negative correlation with increasing temperature while both TCC and bacterial gene copy numbers showed a negative correlation with salinity. Bacterial community composition correlated only weakly with temperature but strongly with pore-water stable isotope signatures and depth, while it showed no correlation with salinity. Microbial community composition showed substantial spatial variation and an overall dominance of Actinobacteria, Chloroflexi, Firmicutes, Gemmatimonadetes and Proteobacteria which are amongst the microbial taxa that were found to be active in other frozen permafrost environments as well. We suggest that, millennia after permafrost warming by over 10 °C, microbial community composition and abundance show some indications for proliferation but mainly reflect the sedimentation history and paleo-environment and not a direct effect through warming.

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Management of a Continuously Cropped Forest Soil Through Fertilizer Use

Experimental Agriculture ◽

10.1017/s0014479700025497 ◽

1995 ◽

Vol 31 (3) ◽

pp. 325-332 ◽

Cited By ~ 3

Author(s):

P. K. Kwakye ◽

E. A. Dennis ◽

A. E. Asmah

Keyword(s):

Crop Rotation ◽

Soil Ph ◽

Crop Yields ◽

Continuous Cropping ◽

Fertilizer Use ◽

The Third ◽

Fertilizer Experiment ◽

Cropping Seasons ◽

High Level

SummaryPhosphorus, followed by potassium, were the plant nutrients that most limited yields during the third decade of a long-term fertilizer experiment on groundnut, maize and cassava conducted on an Ultisol in Ghana. Application of sulphate of ammonia significantly decreased soil pH, thus reducing crop yields. Superphosphate or mulch applied alone consistently increased the yields of all three crops. Application of potash increased the yield of cassava throughout the cropping period, but the potash × mulch interaction depressed yields in two of the three cropping seasons. Use of crop rotation, grass mulch and fertilizer, including small amounts of lime, enabled crop yields and soil fertility to be maintained at a fairly high level under continuous cropping.

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Long-Term Changes in Soil Properties and Microbial Communities are Continuous Cropping Obstacles Associated with American Ginseng (Panax Quinquefolius L.) Cultivation

10.20944/preprints202008.0300.v1 ◽

2020 ◽

Author(s):

Chongwei Li ◽

Guozhong Chen ◽

Jianlong Zhang ◽

Xinfu Bai ◽

Ping Zhu ◽

...

Keyword(s):

Soil Properties ◽

Crop Rotation ◽

Phenolic Acids ◽

American Ginseng ◽

Continuous Cropping ◽

Negative Effects ◽

Opposite Pattern ◽

Physiochemical Properties ◽

Plant Soil

This study aims to verify the time-variant feature of American ginseng (AG) continuous cropping obstacles and to explore the factors impeding continuous cropping. We verified the feature with a plant-soil feedback pot experiment and then investigated the factors by comparing the properties of control soils that had not been previously used for growing ginseng (CS) with those of soils with a 10-year-crop-rotation cycle following the growth of AG (RS). It’s found that the survival rate of AG in RS was lower than that in CS. The RS had lower pH, available potassium content, and urease activity. Additionally, p-coumaric, p-hydroxybenzoic, vanillic, caffeic, and cinnamic acid levels were lower in RS than in CS, but salicylic acid levels showed the opposite pattern. RS had higher Rhodanobacter and lower Acidothermus, Sphingomonas relative abundances in bacterial community. It’s also found that many bacteria were substantially correlated with phenolic acids and soil physiochemical properties. Results indicate that even after 10-year crop rotation, the negative effects of prior continuous cropping of AG has not been eliminated. The growth of AG can be affected negatively with deterioration of soil physicochemical properties and with lower levels of phenolic acids which promote pathogen reproduction. Probiotics reduction also weighs. Moreover, biotic factors are interrelated with abiotic ones. Therefore, it can be inferred that the comprehensive change of soil properties is the main obstacle for continuous cropping.

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Nitrogen and Phosphorus Management Under Long-Term Experiments

Cercetari Agronomice in Moldova ◽

10.2478/v10298-012-0073-y ◽

2013 ◽

Vol 46 (1) ◽

pp. 33-47

Author(s):

C. Ailincăi ◽

G. Jităreanu ◽

Despina Ailincăi

Keyword(s):

Crop Rotation ◽

Agricultural Research ◽

Maize Yield ◽

Wheat Crop ◽

Mineral Fertilizers ◽

Research Station ◽

Continuous Cropping ◽

Nitrogen And Phosphorus ◽

The Mean

Abstract The investigations conducted at the Podu-Iloaiei Agricultural Research Station, Iaşi County, Romania, have studied the influence of different mineral fertilizers rates on wheat and maize yield and soil agrochemical characteristics. In bean-wheatmaize- sunflower-wheat crop rotation, the mean yield increases, obtained for each kg of a.i. of applied fertilizer, were comprised between 8.3 and 10.1 kg in wheat (N120P80- N160P80) and between 10.8 and 11.0 kg in maize (N150P80-N200P100). Generally, nitrogen use efficiency is low and, to achieve maximum yields, need for high doses of nitrogen which can increase the risk of environmental pollution. The N agronomic efficiencies and physiological efficiencies in wheat and maize declined with the increase of nitrogen rate. Wheat placed in rotation for five years, after sunflower at recommended dose (N160P80), physiological efficiency of nitrogen utilization was 43.4 kg grain per kilogram of nitrogen exported from soil, from fertilizer applied. Mean annual amounts of nutrients exported from soil by wheat in dry (14 yr.) and favourable (11 yr.) years in five year crop rotation have varied according to rates, between 34.5 and 100.7 kg at nitrogen and between 6.5 and 18.4 kg at phosphorus. The long-term use of bean - wheat - maize - sunflower - wheat rotation determined the diminution by 43.4% (2,772 t/ha) in the mean annual losses of eroded soil and by 38.5% (5.61 kg/ha) in nitrogen leakages by erosion, compared with maize continuous cropping.

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Microbial community composition and abundance after millennia of submarine permafrost warming

Biogeosciences ◽

10.5194/bg-16-3941-2019 ◽

2019 ◽

Vol 16 (19) ◽

pp. 3941-3958 ◽

Cited By ~ 1

Author(s):

Julia Mitzscherling ◽

Fabian Horn ◽

Maria Winterfeld ◽

Linda Mahler ◽

Jens Kallmeyer ◽

...

Keyword(s):

Microbial Community ◽

Bacterial Community ◽

Community Composition ◽

Pore Water ◽

Negative Correlation ◽

Microbial Community Composition ◽

Microbial Abundance ◽

Bacterial Gene ◽

Permafrost Warming

Abstract. Warming of the Arctic led to an increase in permafrost temperatures by about 0.3 ∘C during the last decade. Permafrost warming is associated with increasing sediment water content, permeability, and diffusivity and could in the long term alter microbial community composition and abundance even before permafrost thaws. We studied the long-term effect (up to 2500 years) of submarine permafrost warming on microbial communities along an onshore–offshore transect on the Siberian Arctic Shelf displaying a natural temperature gradient of more than 10 ∘C. We analysed the in situ development of bacterial abundance and community composition through total cell counts (TCCs), quantitative PCR of bacterial gene abundance, and amplicon sequencing and correlated the microbial community data with temperature, pore water chemistry, and sediment physicochemical parameters. On timescales of centuries, permafrost warming coincided with an overall decreasing microbial abundance, whereas millennia after warming microbial abundance was similar to cold onshore permafrost. In addition, the dissolved organic carbon content of all cores was lowest in submarine permafrost after millennial-scale warming. Based on correlation analysis, TCC, unlike bacterial gene abundance, showed a significant rank-based negative correlation with increasing temperature, while bacterial gene copy numbers showed a strong negative correlation with salinity. Bacterial community composition correlated only weakly with temperature but strongly with the pore water stable isotopes δ18O and δD, as well as with depth. The bacterial community showed substantial spatial variation and an overall dominance of Actinobacteria, Chloroflexi, Firmicutes, Gemmatimonadetes, and Proteobacteria, which are amongst the microbial taxa that were also found to be active in other frozen permafrost environments. We suggest that, millennia after permafrost warming by over 10 ∘C, microbial community composition and abundance show some indications for proliferation but mainly reflect the sedimentation history and paleoenvironment and not a direct effect through warming.

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Long-Term Changes in Soil Properties and Microbial Communities are Continuous Cropping Obstacles Associated with American Ginseng (Panax Quinquefolius L.) Cultivation

10.20944/preprints202008.0300.v2 ◽

2020 ◽

Author(s):

Chongwei Li ◽

Guozhong Chen ◽

Jianlong Zhang ◽

Xinfu Bai ◽

Ping Zhu ◽

...

Keyword(s):

Soil Properties ◽

Crop Rotation ◽

Phenolic Acids ◽

American Ginseng ◽

Continuous Cropping ◽

Negative Effects ◽

Opposite Pattern ◽

Physiochemical Properties ◽

Plant Soil

This study aims to verify the time-variant feature of American ginseng (AG) continuous cropping obstacles and to explore the factors impeding continuous cropping. We verified the feature with a plant-soil feedback pot experiment and then investigated the factors by comparing the properties of control soils that had not been previously used for growing ginseng (CS) with those of soils with a 10-year-crop-rotation cycle following the growth of AG (RS). It’s found that the survival rate of AG in RS was lower than that in CS. The RS had lower pH, available potassium content, and urease activity. Additionally, p-coumaric, p-hydroxybenzoic, vanillic, caffeic, and cinnamic acid levels were lower in RS than in CS, but salicylic acid levels showed the opposite pattern. RS had higher Rhodanobacter and lower Acidothermus, Sphingomonas relative abundances in bacterial community. It’s also found that many bacteria were substantially correlated with phenolic acids and soil physiochemical properties. Results indicate that even after 10-year crop rotation, the negative effects of prior continuous cropping of AG has not been eliminated. The growth of AG can be affected negatively with deterioration of soil physicochemical properties and with lower levels of phenolic acids which promote pathogen reproduction. Probiotics reduction also weighs. Moreover, biotic factors are interrelated with abiotic ones. Therefore, it can be inferred that the comprehensive change of soil properties is the main obstacle for continuous cropping.

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Crop rotations with clover and their productivity

Multifunctional adaptive feed production № 23 (71) ◽

10.33814/mak-2020-23-71-38-42 ◽

2020 ◽

Author(s):

Ol'ga Gladysheva ◽

Oksana Artyuhova ◽

Vera Svirina

Keyword(s):

Forest Soil ◽

Crop Rotation ◽

Gray Forest Soil ◽

Arable Land ◽

Perennial Grasses ◽

Crop Rotations ◽

Field Crop ◽

Pure Steam ◽

Positive Effect

The results of long-term research in experiments with crop rotations with different clover saturation are presented. It is shown that the cluster has a positive effect on the main indicators of vegetation of dark-gray forest soil. The introduction of two fields of perennial grasses into the six-field crop rotation significantly increases both the humus reserves and increases the productivity of arable land by 1.5–2 times compared to the crop rotation with a field of pure steam.

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