Long-term management effects on soil P, microbial biomass P, and phosphatase activities in prairie soils

The continuous cropping (CC) of major agricultural, horticultural, and industrial crops is an established practice worldwide, though it has significant soil health-related concerns. However, a combined review of the effects of CC on soil health indicators, in particular omics ones, remains missing. The CC may negatively impact multiple biotic and abiotic indicators of soil health, fertility, and crop yield. It could potentially alter the soil biotic indicators, which include but are not limited to the composition, abundance, diversity, and functioning of soil micro- and macro-organisms, microbial networks, enzyme activities, and soil food web interactions. Moreover, it could also alter various soil abiotic (physicochemical) properties. For instance, it could increase the accumulation of toxic metabolites, salts, and acids, reduce soil aggregation and alter the composition of soil aggregate-size classes, decrease mineralization, soil organic matter, active carbon, and nutrient contents. All these alterations could accelerate soil degradation. Meanwhile, there is still a great need to develop quantitative ranges in soil health indicators to mechanistically predict the impact of CC on soil health and crop yield gaps. Following ecological principles, we strongly highlight the significance of inter-, mixture-, and rotation-cropping with cover crops to sustain soil health and agricultural production.

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“…[108,109]. Similarly, some studies have also reported that long-term CC may also decrease the microbial biomass P [110] and C contents [111].…”

Section: Microbial Biomass or Abundancementioning

confidence: 83%

Continuous Cropping Alters Multiple Biotic and Abiotic Indicators of Soil Health

et al. 2020

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“…Changes in plant composition can alter the soil microbiology either from the addition or loss of plants that support symbioses [mycorrhizae, nitrogen (N) fixation] or by changing soil chemical or physical properties in ways that alter the rhizosphere microbiology, such as pH or porosity (Marschner et al 1987;Pérez-Suárez et al 2014). Altering the plant or microbial community can influence nutrient cycling through the production of enzymes and low molecular weight organic acids (Marschner et al 1987;Katsalirou et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Long-term agricultural land use affects chemical and physical properties of soils from Southwest Saskatchewan

et al. 2017

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Understanding nutrient cycling under different land uses can improve agricultural management practices. In southwestern Saskatchewan, long-term land use as annual cropland, native grassland pasture, tame (planted) crested wheatgrass grasslands, or roadsides altered soil physical and chemical properties based on the intensity and frequency of disturbance, with cropland > roadsides > tame grassland > native grassland. The majority of significant differences were detected at the soil surface (0-7.5 cm); few significant differences below 15 cm suggested that the soils were not significantly different prior to changes in land use. Bulk density was increased in cropland soils compared with native grassland, probably from compaction from farm equipment, and in tame pastures due to their past use as croplands. Croplands also had decreased carbon and organic phosphorus (P) and increased Olsen P compared with grasslands, from crop removal and fertilizer inputs. Roadsides, an important but poorly studied land use in Saskatchewan, had increased clay and Olsen P concentrations compared with native grassland. Roadsides were disturbed during road building and remained disturbed because of runoff from adjacent fields and dust from roads. These results on soil chemical and physical properties, combined with soil microbiology information, will help to improve land management and nutrient use efficiency in soils of this region.

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“…Furthermore, ALP at 5 m was significantly higher than that of the other sites, while ACP showed no significant differences. This may be attributed to the pH sensitivity of amino acid functional groups in the different phosphatases (Dick, Cheng, & Wang, 2000); ACP activity is known to be much higher in acidic soils, while ALP activity is much higher in alkaline soils (Katsalirou, Deng, Gerakis, & Nofziger, 2016; Luo et al, 2017). Phosphatases are thought to play a major role in the mineralization of Po to Pi (Nannipieri et al, 2012; Tarafdar & Jungk, 1987).…”

Section: Discussionmentioning

confidence: 99%

Changes in soil phosphorus availability and associated microbial properties after chicken farming in Lei bamboo (Phyllostachys praecox) forest ecosystems

Gai

Zhu

et al. 2021

Land Degrad Dev

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Bamboo‐chicken farming (BCF) is a popular bamboo complex management model in Southeast Asia. However, the effects of BCF on phosphorus (P) availability and associated soil microbial communities remain poorly understood. In this study, we compared the soil properties, P fractions, phosphatase activities, and bacterial community compositions in the surface soil (0–20 cm) of a typical BCF system under different grazing densities [represented as distances of 5, 15, 25, 35, and > 60 m (control site) from the henhouse, respectively]. We observed that total P (Pt) accumulation was more rapid than that of SOC and TN with increasing grazing density. Labile and moderately labile P dominated soil P accumulation under BCF. Resin‐Pi, NaHCO3‐Pi, and 1 M HCl‐Pi increased by 100–233%, 83–183%, and 414–1,314%, respectively, compared with the control. The ratio of labile and moderately labile organic P to the Pt content decreased significantly with increasing grazing density from 38.54% (control) to 17.65% (5 m site). Soil phosphatase activity increased with increasing grazing density, suggesting that BCF effectively promoted the mineralization of soil Po. Inorganic P (Resin‐Pi, NaHCO3‐Pi, and 1 M HCl‐Pi) was positively correlated with Flavobacterium, Pseudomonas, and Arthrobacter but negatively correlated with Burkholderia; this highlights the different functional bacteria involved in P cycling. We conclude that BCF generally increased soil P availability and supply capacity, and the changes in P forms were closely related to changes in soil bacterial community composition. The highly labile P and low C : P ratio under high grazing density conditions may cause soil nutrient imbalance and P leaching.

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Long-term management effects on soil P, microbial biomass P, and phosphatase activities in prairie soils

Cited by 22 publications

References 47 publications

Continuous Cropping Alters Multiple Biotic and Abiotic Indicators of Soil Health

Continuous Cropping Alters Multiple Biotic and Abiotic Indicators of Soil Health

Long-term agricultural land use affects chemical and physical properties of soils from Southwest Saskatchewan

Changes in soil phosphorus availability and associated microbial properties after chicken farming in Lei bamboo (Phyllostachys praecox) forest ecosystems

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