Potato Soil Research Articles

Effect of deep loosening of interrows on physical properties of sod-podzolic soil and yield of organic potato

The purpose of this research is to study the effect of deep loosening of row spacings on the physical properties of the soil and yield of organic potatoes. Two variants of soil cultivation were used in row spacings: usual and 25 cm deep. The soil cultivation was carried out with a row-crop chisel cultivator. Its design was developed at the institute. Analysis of the data obtained as a result of experimental studies showed that deep loosening of row spacings had a positive effect on soil compaction both in the inter-row width and directly in the plough ridge. The soil compaction in the row spacing during normal tillage was in average above 20 %, and in the ridge by an average of 13 % compared to deep tillage. The assimilation of moisture by the soil with when using of deep loosening of row spacings also had a positive trend, especially under condition of a large amount of precipitation in a short period of time. Thus, with a loss of 34 mm, the soil in the variant with loosening the row spacings in a larger volume absorbed moisture and the moisture indicators increased sharply in layers, at 15 cm by 27 %, at 25 cm by 20 %, at 35 cm by 5 %. Potato yield increased by 8.7 % when using deep loosening of row spacings. The obtained results of experimental studies should be used as recommendations when carrying out technological operations aimed at caring for potato plantings.

Calibration and Testing of Discrete Element Simulation Parameters for Sandy Soils in Potato Growing Areas

To improve the accuracy of discrete element simulation in the process of separating potato–soil mixtures, the contact parameters of sandy soil with 3, 6, 9, and 12% water content were calibrated in DEM simulation using EDEM software simulation. The error of the rest angle between them was used as an index, and the approach of performing only one simulation and multiple Box–Behnken response surface analyses was proposed to determine the optimal parameter combinations. Meanwhile, unconfined compression and direct shear tests were conducted to obtain the parameters of polymer bonds for soil with different water content, and a simulation was carried out using EDEM. The test results show that the significant parameters affecting the rest angle are JKR surface energy, soil interparticle recovery coefficient, and rolling friction factor. The numerical simulation of the rest angle was compared with the physical test, and the maximum relative error between them was 4.72%. The bond parameters of soil with different water content and firmness were obtained and compared with the simulation test, the maximum error was 6.53% for the direct shear test and 8.07% for the unconfined compression test, which proved that the bonding parameters are reliable and provide an effective parametric and theoretical basis for the discrete element simulation of soil particles.

Soil microbial community assembly and stability are associated with potato (Solanum tuberosum L.) fitness under continuous cropping regime.

Continuous cropping obstacles caused by the over-cultivation of a single crop trigger soil degradation, yield reduction and the occurrence of plant disease. However, the relationships among stability, complexity and the assembly process of soil microbial community with continuous cropping obstacles remains unclear. In this study, molecular ecological networks analysis (MENs) and inter-domain ecological networks analysis (IDENs), and a new index named cohesion tools were used to calculate the stability and complexity of soil microbial communities from eight potato cultivars grown under a continuous cropping regime by using the high-throughput sequencing data. The results showed that the stability (i.e., robustness index) of the bacterial and fungal communities for cultivar ZS5 was significantly higher, and that the complexity (i.e., cohesion values) was also significantly higher in the bacterial, fungal and inter-domain communities (i.e., bacterial-fungal community) of cultivar ZS5 than other cultivars. Network analysis also revealed that Actinobacteria and Ascomycota were the dominant phyla within intra-domain networks of continuous cropping potato soil communities, while the phyla Proteobacteria and Ascomycota dominated the correlation of the bacterial-fungal network. Infer community assembly mechanism by phylogenetic-bin-based null model analysis (iCAMP) tools were used to calculate the soil bacterial and fungal communities’ assembly processes of the eight potato cultivars under continuous cropping regime, and the results showed that the bacterial community was mainly dominated by deterministic processes (64.19% - 81.31%) while the fungal community was mainly dominated by stochastic processes (78.28% - 98.99%), indicating that the continuous-cropping regime mainly influenced the potato soil bacterial community assembly process. Moreover, cultivar ZS5 possessed a relatively lower homogeneous selection, and a higher TP, TN, AP and yield than other cultivars. Our results indicated that the soil microbial network stability and complexity, and community assemble might be associated with yield and soil properties, which would be helpful in the study for resistance to potato continuous cropping obstacles.

Allelochemicals from the Rhizosphere Soil of Potato (Solanum tuberosum L.) and Their Interactions with the Soilborne Pathogens.

To reveal the allelopathic effects of potato, seven compounds were isolated from the rhizosphere soil: 7-methoxycoumarin (1), palmitic acid (2), caffeic acid (3), chlorogenic acid (4), quercetin dehydrate (5), quercitrin (6), and rutin (7). Bioassays showed that compounds 1, 2, 4, and 6 had inhibitory effects on the growth of L. sativa and tissue culture seedlings of potato. The existence of the allelochemicals was confirmed by HPLC, and their contents were quantified with a total concentration of 9.02 μg/g in the rhizosphere soil of replanted potato. Approaches on the interactions of the allelochemicals and pathogens of potato including A. solani, B. cinerea, F. solani, F. oxysporum, C. coccodes, and V. dahlia revealed that compound 1 had inhibitory effects but compounds 2–4 promoted the colony growth of the pathogens. These findings demonstrated that the autotoxic allelopathy and enhancement of the pathogens caused by the accumulation of the allelochemicals in the continuously cropped soil should be one of the main reasons for the replant problems of potato.

Design of conveyor separation device for potato harvester and analysis of its vibration characteristics

In view of the influence of vibration factors on the vibration characteristics of potato harvester, to study the effect of vibration parameters on the dynamic characteristics of the system and harvested potato quality, in this paper an indoor conveyor separation device for potato harvester with adjustable two-way synchronous conveying vibration parameters was designed. The device, with double-side chain drive to improve conveying efficiency and replaceable eccentric parts to change vibration parameters, allows the system to harvest potatoes under optimal working conditions. A simulation analysis of a dynamics model of the system, which was first established, was carried out. A potato soil separation test was conducted using the vibration testing system and acceleration sensor, and its data was compared with the simulation data to verify the correctness of the model. The results showed that the eccentricity, rotation speed, and inclination had an impact on the potato-soil separation rate and the vibration of the system. The analysis showed that the system had a higher potato-soil separation rate and slighter vibration under optimal working conditions, that is, eccentricity of 0.023 m, rotation speed of 130 r/min, and inclination of 26∘.

Antagonistic and growth enhancement activities of native Pseudomonas spp. against soil and tuber-borne diseases of potato (Solanum tuberosum L.)

BackgroundSoil and tuber-borne diseases are serious threat for potato cultivation worldwide which causes severe economical losses in terms of yield, quantity and quality. Generally, these diseases managed by chemical pesticide, are a major concern for human health and environment. Therefore, finding an eco-friendly alternative management strategies are necessary. The native bacterial isolates collected from different crops rhizosphere soil were evaluated against Rhizoctonia solani, Sclerotinia sclerotiorum, Sclerotium rolfsii and Fusarium spp and were also tested for their growth enhancement attributes on potato crop and phosphate solubilising efficiency.ResultsBased on the morphological and phenotypic characters, most of the isolates were identified as Pseudomonas spp (18 isolates). A total of twenty-two bacterial isolates were screened for bio-control activity in dual culture assay. Isolate Pf14 showed the highest mycelial inhibitory potential (ranged from 62.2 to 59.3%) against R. solani, S. sclerotiorum, S. rolfsii and Fusarium spp. In sealed plate assay, Pf14 produced antifungal volatile compounds that significantly inhibited mycelial growth (ranged from > 80 to > 50%). Maximum reduction in fungal biomass (ranged from > 80%) was observed in King’s broth in shake liquid culture in all the pathogens. Cell-free culture filtrate of the selected isolate inhibited mycelial growth ranged from 68.9 to 42.6% of the tested pathogens with 48-h old culture filtrate. Additionally, the isolates exhibited higher phosphorus solubilizing efficiency on PVK media. Under field conditions, talc based formulation of Pf14 showed enhanced agronomical characters and inhibits black scurf severity up to 67.59%. This treatment also recorded a highest tuber yield (21.90 t/ha) with increase of 15.38% in comparison to untreated control.ConclusionOverall, antagonistic bacterium Pf14 can be recommended as bio fertilizers for eco-friendly management of major potato fungal diseases as well as increasing marketable yield and used as an alternative to the pesticides and chemical fertilizers.

Mineral and Organic Fertilizers Distinctly Affect Fungal Communities in the Crop Rhizosphere

Fungi represent a diverse group of organisms that play an essential role in maintaining soil health and ecosystem functioning. Plant root exudates form nutrient-rich niches that harbor specific fungal communities, or so-called rhizosphere mycobiomes. The long-term application of fertilizers supplies the soil with nutrients that may override the plant-related effects on rhizosphere fungal communities. Here, we assessed the effect of contrasting fertilization regimes on the composition, diversity, and abundance of bulk soil and rhizosphere mycobiomes of potato, white mustard, and maize under NPK (mineral fertilizers) or fresh cattle manure (organic fertilizers). Mineral and organic fertilizers led to distinct fungal communities in the rhizospheres of all studied crops, and the plant-related effects on the mycobiome were overridden by the effect of fertilization. The abundances of Ascomycota and Olpidiomycota were higher under manure, while the abundances of Basidiomycota and Monoblepharomycota increased under NPK. Manure input strongly increased fungal abundance but decreased fungal diversity and the total number of species. NPK had a slight effect on fungal diversity, but significantly increased the relative abundances of fungal phytopathogens, such as Alternaria and Fusarium. Our study shows that that potential plant species effects on the abundance and diversity of the rhizosphere mycobiomes are governed by long-term fertilization. Fertilization management could therefore be used to manipulate rhizosphere fungal communities and soilborne pathogen suppressiveness.

Plant growth promoting rhizobacterial diversity in potato grown soil in the Gwalior region of India

There seems to be meager studies with regards to rhizo and non-rhizo microbial association with potato plant from the central India. Present study was undertaken to evaluate the microbial diversity of rhizospheric and non-rhizospheric isolates from three varieties of potato viz Kufri sindhuri, Kufri lauvkar and Kufri chipsona-3 procured from the Central Potato Research Station, Maharajpura, Gwalior. A total of 130 bacterial forms were isolated, and amongst these forty isolates were further characterized on their morphological basis, and those showing some of PGPR characteristics were identified to species level using VITEK-2 method. Various bacterial populations were found in potato rhizosphere and dominant presence was those of Bacillus subtilis, Bacillus Megaterium and Lysinibacillus sphaericus. The non-rhizospheric soil was dominant in the forms like Aeromonas salmonicida, Morxella group and Bacillus coagulans. Highest bacterial diversity was found in the rhizosphere soil of different potato cultivars than in the non-rhizospheric soil of potato.

Evaluation Of Anti-Biofilm Activity Of Bacterial Amylase Against Human Pathogens

Global healthcare crisis has a significant impact on human health and economy because of antimicrobial resistance. Emergence of antibiotic resistance due to excessive antibiotic use results in resistant microbes. Biofilm shows integral resistance to antimicrobial agents and the host defense system. Microbes that exist in the biofilms, shows 10-1000 times resistance to antibiotics as compared to the free life style. The biofilms of bacteria serve as a great issue in not only environmental and industrial line but also play an important role in healthcare setting. The biofilm producing bacteria such as Vibrio cholerae and antibiotic resistant bacteria like methicillin resistant Staphylococcus aureus (MRSA) cause deadly infections. In present study, efficacy of bacterial amylase was tested against biofilm formation of pathogenic microbes. For this, Amylase producing bacterial isolates (isolated from a variety of sources, such as waste, rhizosphere of vegetable soil, rice field, potato, and sugarcane field soils sources (ArPs, ArDs, ArSs, ArVs and ArRs) were utilized to reduce the microbial biofilm development against pathogenic isolates of Staphylococcus aureus and Pseudomonas aeruginosa. Six bacterial isolates (SB, SW, SU, PB, PW, and PU) obtained from cancer patients of tertiary care hospitals. Amylase enzyme extracted from ArPs showed maximum growth inhibitory effect on SW pathogen, while ArRs showed minimum growth effect upon SB pathogens. However, amylase showed highest anti-biofilm activity against SW pathogen. In general, the highest biofilm inhibition was recorded at pH7 at 37°C as compared to rest of pHs and temperatures. The efficacy of bacterial amylase in biofilm inhibition of human pathogens, seem promising and having significant potential in health care systems.

Chemical Response of Soils to Traditional and Industrial Byproduct Wood Biochars

ABSTRACT Soil degradation and a global focus on carbon (C) sequestration in soils have resulted in growing societal interest in soil health practices. Biochar has a high C content, porosity, pH, and cation exchange capacity that benefit soil properties. Here we described an incubation study that aims to evaluate the influences of biochar additions on representative forest organic, forest mineral, blueberry, potato, and mixed vegetable soils from Maine, USA. The experiment consisted of amendments of either a lime stabilized industrial byproduct softwood pulp biochar (SPB) or pine wood biochar (PB) at application rates equivalent to 0, 5, 10, 25, 50, and 100 t ha−1. Here we report influences of biochar addition on soil pH, loss-on-ignition (LOI), water-holding capacity (WHC), and exchangeable cations. In general, both SPB and PB increased the value of these soil properties in all mineral soils, with significant increases often being found at a rate of 100 t ha−1. Forest organic soils, however, were more variable attributable to the high organic C concentration of this substrate. Soil response to SPB amendments was strongly influenced by the lime component, although few significant differences were found between SPB and PB amended soils. Analysis of carbon dioxide (CO2) emissions from SPB amendments due to lime dissolution and acid neutralization represented less than 3% of the total carbon added in SPB treated soils, leaving SPB and PB both important potential soil amendments. This suggests that both traditional and industrial byproduct biochars have potential for soil health and C sequestration management goals.

Effectiveness of bioactive compounds in amending the soil infested with soil-borne Ralstonia solanacearum of potato

Three natural bioactive compounds, viz. cow dung, bee propolis and turmeric powder were applied to amend the Ralstonia solanacearum infested soil of potato. Sun dried cow dung @ 30 t/ha, aqueous extraction of turmeric powder @ 30 kg/ha and propolis @ 5 lit/ha were applied to the inoculated soil by mixing with field soil in SAU (Dhaka) and BARI (Gazipur). Data on pH, organic matter, total cfu/ml and avirulent cfu/ml of the treatment applied soil and per cent disease index (PDI) of bacterial wilt of potato were recorded. Significant difference in soil pH and per cent organic matter (OM) occurred in all the amended soil as compared to control. A decreased total cfu/ml of R. solanacearum occurred in all the treated soil, but propolis (8.2 X 107) and cow dung (1.1 X 108) showed the lowest count. However, in increasing the avirulent count of R. solanacearum, turmeric powder (1.8 X 109) showed the highest count compared to other amended soil. Significant disease reduction over control was also observed in all the treatments, but propolis (45.65%) and turmeric powder (43.48%) showed the best results in wilt disease reduction. J. Biodivers. Conserv. Bioresour. Manag. 2021, 7(1): 43-50

Screening and assessing of pesticide residues and their health risks in vegetable field soils from the Eastern Nile Delta, Egypt

The harmful effects of pesticide misuse on human health and the environment have become evident; so, this study aimed to monitor pesticide residues in soils of vegetable fields collected from the Eastern Nile Delta region, Egypt and to assess the potential health risks associated with them. Pesticide residues were determined using gas chromatography-mass spectrometry. Obtained results revealed that 100% of collected samples were contaminated with pesticides; residues of 33 compounds were detected in analyzed samples belonging to different chemical groups. Most detected pesticides (44%) were non-persistent and 40% were moderately persistent. While 1313% and 3% were persistent and very persistent compounds, respectively. Also, 36.7% and 30% of samples have two and three pesticides. Chlorpyrifos and propamocarb were the most dominant compounds that had widespread use across the study area. The number of detected pesticides per crop ranged from 1 to 16 (potato soil), followed by cucumber and tomato (13 pesticides), while one compound was detected in sweet potato soil. Soil organic matter content had a positive correlation with the total concentration of pesticide residues; however, no correlations were found with soil clay, pH and electrical conductivity contents. The human health risks of pesticides in the study soils were within acceptable levels. However, more attention should be paid in the future to decreasing the pesticide load and take place pesticide residue monitoring on vegetable soils.

Effects of Bio and Water-Soluble Fertilizers on Sweet Potato Yield, Quality and Soil Properties in a Continuous Cropping System Under Plastic Film-Mulched Drip-Fertigated Field Conditions

Effects of Bio and Water-Soluble Fertilizers on Sweet Potato Yield, Quality and Soil Properties in a Continuous Cropping System Under Plastic Film-Mulched Drip-Fertigated Field Conditions

Assessing the synergistic impacts of poultry manure and biochar on nutrient-depleted sand and sandy loam soil properties and sweet potato growth and yield

Summary Poultry manure (PM) has been shown to boost crop productivity. However, little is known about its favorable interactions with wood biochar (B) on sweet potato (Ipomoea batatas L.) growth and yield, and soil qualities. Hence, a 2-year field trial was conducted in the southwest Nigeria at two locations (Owo – site A and Obasooto – site B) to co-apply PM and wood B as soil amendments to boost sweet potato productivity and soil quality. The experiment consisted of a 3 × 4 factorial layout with three replications. PM and B significantly reduced soil bulk density and improved porosity and moisture content with their rate of application when compared to the control. As PM and B applications increased from 0 to 10.0 t ha−1 and 0 to 30.0 t ha−1, respectively, soil chemical properties and sweet potato growth and tuber yield increased. Co-application of 10.0 t ha−1 PM and 30.0 t ha−1 B increased tuber yield by 220% compared to treatments without PM or B. Significant synergistic interactions between PM and B were observed for all parameters. In comparison with other treatments, co-applying PM and B to sweet potato soils is a viable sustainable option for increasing sweet potato productivity and soil sustainability.

DESIGN OF A NEW POTATO COMBINE HARVESTER

There are two ways to harvest potatoes. One is to harvest potatoes with a large potato combine harvester. The excavated potatoes are screened by one-and two-level screening and conveying devices, and then collected and conveyed by a collection device moving forward in parallel with the harvester, which is energy-intensive because the harvester is large. The other is to harvest potatoes with various small potato combine harvesters. Among them, the simplest one is a small potato combine harvester with only a one-level ordinary rod screening and conveying device. The excavated potatoes are simply screened only by a conveying screen running flatwise, and then directly fall on the ground for artificial collection, which is labor-intensive and inefficient. In view of the above problems, a small potato combine harvester with compact structure, high harvest efficiency and good potato quality was designed in this paper. The proposed harvester comprises a frame, a soil cutting plate, an excavation device, six levels of potato separation conveying devices, a potato collection device and a drive system. The one-level separation conveying device uses the quincunx-shaped vibrator to vibrate the potato soil mixture conveyed by the excavation device slightly at high frequency, which crushes large clods while keeping potatoes from rolling and colliding, reducing the damage of potatoes; the two-level separation conveying device uses the finger-shaped claw conveying device to break up small clods; the three-level separation conveying device has soil dumping function; the four-level separation conveying device uses a roller brush to brush off the soil attached to potato skins. The disk rotation shafts of the five-level separation conveying device make the potatoes roll forward to further remove the residual soil. The proposed harvester realizes automated potato excavation, separation, conveying and harvesting, and improves the potato harvest efficiency and quality. The results of this paper can provide some reference for the design and optimization of potato combine harvesters.

Evaluation of patatin content in proteins of potato genotypes grown in Latvia

Abstract Potato proteins contains essential amino acids in considerably high concentration, therefore potatoes are considered to be one of the most valuable plant origin food for human consumption. Patatin forms one of the largest group of potato proteins with high potential to be used in food industry as a novel food. This study has been performed to approbate patatin determination method for evaluation of protein quality of potato genotypes, as well as evaluate patatin relative abundance (PRA) for breeding programmes to create in the future potato cultivars with higher value and potential to develop new products. The evaluation of patatin was performed in following steps– extraction proteins from potato, determination of patatin concentration and calculation of its relative abundance in proteins. Separation of patatin from potato tubers was made using extraction by SDS extraction buffer and determination of patatin in organically and conventionally (with differnt N suply) grown samples of 20 potato genotypes. The results of one-year study showed that patatin relative abundance of different cultivars varied from 1.65% to 50.2% and it was significantly different among genotypes. The nitrogen content of soil and maturity type of potato did not affect PRA significantly. Results provide impetus for further research.

Long-term fertilization with high nitrogen rates decreased diversity and stability of diazotroph communities in soils of sweet potato

Sweet potato (Ipomoea batatas Lam) could produce acceptable root yield in low-nitrogen (N) soils, with substantial N uptake potentially attributed to supplies provided via biological N2-fixation by free-living diazotrophs. However, dynamics of diazotrophic communities as influenced by soil properties across the N fertilization gradients are still largely unclear. Long-term fertilization experiment under wheat-sweet potato rotation was established in an acid yellow brown soil since 2011. Soil samples were collected after sweet potato harvest (October 2018). The nitrogenase (nifH) gene real-time polymerase chain reaction (RT-PCR) and Hiseq high-throughput sequencing technologies were applied to soil samples from four N fertilizer treatments (0, 60, 120 and 180 kg ha−1). The results showed that long-term N fertilization significantly decreased abundance of the nifH gene, which was closely related to decreases in the content of available phosphorus (AP). The long-term high-N (120 and 180 kg ha−1) fertilization dramatically altered structure of soil diazotrophic community and lead to in decreased diversity of diazotrophs, whereas low-N (60 kg ha−1) fertilization maintained diazotrophic community diversity and stability. Compared with the low-N fertilizer inputs (0 and 60 kg ha−1), the high rates of N fertilization (180 kg ha−1) significantly decreased the relative abundance of nifH-harboring microorganisms, especially the phylum Cyanobacteria known as potential N2-fixers that could sustain fertility of sweet potato soils. There were negative correlations between N fertilization rates and the relative abundance of Proteobacteria, whereas the Bacteroidetes and Firmicutes showed a positive correlation. Moreover, the structural equation model (SEM) results suggested that the diazotrophic community diversity and structure were influenced mostly by soil pH rather than SOM and N forms (TN, NH4+-N and NO3−-N), and diazotrophs abundance mainly regulated by soil AP content. Our results implied that appropriate N fertilization is beneficial to sustain the stability and diversity of the diazotrophic community.

Chitosan-Urea Nanocomposite for Improved Fertilizer Applications: The Effect on the Soil Enzymatic Activities and Microflora Dynamics in N Cycle of Potatoes (Solanum tuberosum L.).

The impact of polymer-based slow-release urea formulations on soil microbial N dynamics in potatoes has been sparingly deciphered. The present study investigated the effect of a biodegradable nano-polymer urea formulation on soil enzymatic activities and microflora involved in the N cycling of potato (Solanum tuberosum L.). The nano-chitosan-urea composite (NCUC) treatment significantly increased the soil dehydrogenase activity, organic carbon content and available potassium compared to the conventional urea (CU) treatment. The soil ammonical nitrogen (NH4+-N) and nitrate nitrogen (NO3−-N) contents and urease activity were significantly decreased in the NCUC-amended soil. The slow urea hydrolysis rate led to low concentrations of NH4+-N and NO3−-N in the tested potato soil. Furthermore, these results corroborate the low count of ammonia oxidizer and nitrate reducer populations. Quantitative PCR (q-PCR) studies revealed that the relative abundance of eubacterial (AOB) and archaeal ammonia-oxidizing (AOA) populations was reduced in the NCUC-treated soil compared to CU. The abundance of AOA was particularly lower than AOB, probably due to the more neutral and alkaline conditions of the tested soil. Our results suggest that the biodegradable polymer urea composite had a significant effect on the microbiota associated with soil N dynamics. Therefore, the developed NCUC could be used as a slow N-release fertilizer for enhanced growth and crop yields of potato.

Mulching films affecting soil bacterial and fungal communities in a drip-irrigated potato soil

Film mulching is an effective water-saving and yield-increasing measure for potato production in Northwest China. However, the response mechanism of microbial communities to mulching films in the soil is still unclear. In this study, polyethylene film mulching (PM), biodegradable film mulching (BM), liquid film mulching (LM), and non-mulching (NM) were applied on the drip-irrigated soil to investigate the effects of mulching films on soil bacterial and fungal communities through DNA sequencing, Pearson correlation analysis, and redundancy analysis. The results [...]

Study on residue and dissipation of flurochloridone by LC-MS/MS in potato and soil under open-field conditions in the China’s Qinghai Plateau

ABSTRACT In this research, the dissipation dynamics and residue distribution of flurochloridone in potato were assessed using a modified QuEChERS method combined with LC-MS/MS. At 0.01–1 mg kg−1 flurochloridone application, the recoveries ranged from 81.3% to 90.9% in potato leaf, root, tuber and soil, with the relative standard deviation of 1.6%-3.5%. The limits of quantification and detection for flurochloridone were 0.01 and 0.001 mg kg−1 in the four matrices. The dissipation dynamic and terminal residue analyses of flurochloridone 25% emulsifiable concentrate in potato was conducted in three different areas of Qinghai plateau (Haidong, Haixi and Haibei). The half-lives of flurochloridone in the three districts were 25.7, 27.7 and 19.3 days in soil as well as 8.1, 10.2 and 7.0 days in leaf, respectively. The terminal residues of flurochloridone were <0.001, 0.005–0.013, <0.001 and 0.007–0.023 mg kg−1 in potato leaf, root, tuber and soil, respectively, which did not exceed the European maximum residue limit recommendation (0.1 mg kg−1). Our findings can provide a basic framework for the appropriate use of flurochloridone in potato in the Qinghai plateau.