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Journal of Forestry Research 2022年第1期33卷 253-260页

作者： Peng Yu Xin Zhang Huiyan Gu Jianping Pan Xiangwei Chen Northeast Forestry University Harbin 150040People’s Republic of China Academy of Forest and Grassland Inventory and Planning National Forestry and Grassland AdministrationBeijing 100714People’s Republic of China

To assess phosphorus(P)status of forest soil under naturally restored vegetation,P fractions in the 10-cm soil layer were quantified at different successional stages on the clear-cut site of mixed broadleaved and Korean pine forest.Four communities of shrub,softwood broad-leaved forest,softwood and hardwood broad-leaved forest,and hardwood broad-leaved forest represented different successional stages.A soil sample from a primary broad-leaved and Korean pine stand was the control.A sequential P fractionation scheme extracted empirically defined pools of P and path analysis used to partition the direct and indirect contribution of soil P fractions to available P.The results show that available P increased significantly with long-term succession,while both sodium bicarbonate-extractable P(NaHCO_(3)-P)and sodium hydroxide-extractable P(NaOHP)fractions were reduced in early successional stages and increased in late stages.Compared to the primary forest,concentrations of P fractions in the four stages significantly decreased except for HCl-P,indicating that soil P supplements over the long-term did not return to primary forest levels.The results of related analysis also showed that NaHCO_(3)-P_(i)levels were significantly related to available phosphorus.According to the path analysis coefficient,NaHCO_(3)-P_(i)exhibited the highest effect on available P among eight P fractions;the indirect effects of other P fractions via NaHCO_(3)-P_(i)were larger than those with other P fractions.Overall,this study suggests that soil P bioavailability gradually improved during natural vegetation restoration on clear-cut sites mainly through the increase of NaHCO_(3)-P,where phosphorous is immediately available,and subsequently available phosphorus Na OH-P.

关键词： Vegetation succession available phosphorus phosphorus fractions Correlation analysis Path analysis

Effective alleviation of Cd stress to microbial communities in mining reclamation soils by thiourea-modified biochar amendment

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Pedosphere 2022年第6期32卷 866-875页

作者： Yanfeng ZHU Jing MA Fu CHEN Ruilian YU Gongren HU Yongjun YANG Engineering Research Center of Ministry of Education for Mine Ecological Restoration China University of Mining and TechnologyXuzhou 221008(China) College of Chemical Engineering Huaqiao UniversityXiamen 361021(China) Low Carbon Energy Institute China University of Mining and TechnologyXuzhou 221008(China)

Reclaimed soils in mining area usually display low fertility and present Cd stress.The amendment of modified biochar effectively fixes Cd in soils,enhances soil fertility,and reduces Cd stress in soil microorganisms.However,the effect of thiourea-modified biochar(TBC)on microbial adaptability to Cd stress in mining reclamation soils is still unclear.The present work studied the Cd immobilization and microbial community changes in a mining reclamation soil displaying extreme Cd contamination under TBC amendment.The results indicated that the amendment of TBC significantly enhanced(Pavailable phosphorus(AP),and the activities of urease and polyphenol oxidase by 1.3%,463.4%,54.4%,and 84.0%,respectively,compared to the control without amendment.The amount of toxicity characteristic leaching procedure-extracable Cd decreased(P<0.05)by 68.0%in the TBC-amended soil compared with the unamended soil.The structure of soil microbiota was reorganized and the alpha diversity index was increased in the TBC treatment.The TBC amendment increased the relative abundances of Proteobacteria,Bacteroidota,and Zoopagomycota,which were strongly associated(P<0.01)with higher soil pH and AP.Structural equation model results demonstrated that Cd immobilization was directly influenced by soil pH,AP,and urease,and indirectly affected by bacterial structure in the TBC treatment.The TBC amendment can effectively improve the structural composition of soil bacteria under Cd stress and enhance the pathways of decreasing soil Cd availability as well.The results might facilitate the development of in-situ remediation programs in Cd-contaminated soils in the future.

关键词： available phosphorus bacterial structure Cd immobilization enzyme activity toxicity characteristic leaching procedure-extracable Cd

The distribution and availability of phosphorus fractions in restored cut slopes soil aggregates:a case study of subalpine road,Southwest China

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Frontiers of Environmental Science & Engineering 2023年第4期17卷 27-39页

作者： Mengke Zhu Bocong Huang Shenghao Ai Zongyang Liu Xiaoyan Ai Meihua Sheng Yingwei Ai Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education College of Life SciencesState Key Laboratory of Hydraulics and Mountain River EngineeringSichuan UniversityChengdu 610065China Chengdu Institute of Organic Chemistry Chinese Academy of SciencesChengdu 610041China University of Chinese Academy of Sciences Beijing 100049China

The distribution and availability of phosphorus(P)fractions in restored cut slope soil aggregates,along altitude gradients,were analyzed.Samples were collected at 3009,3347,3654 and 3980 m of altitude.We examined soil aggregates total phosphorus(TP),available phosphorus(AP)and phosphorus activation coefficient(PAC),and discovered that there was no significant difference in TP levels between all four altitudes samples(p>0.05).However,there was a significant difference in AP at 3009,3347 and 3980 m of altitude(pPAC(3347 m)>PAC(3009 m)>PAC(3980 m).In all particle size soil aggregates,the distribution of the P fractions was as follows:total inorganic phosphorus(TPi)>total organic phosphorus(TPo)>residual phosphorus(R-P),at 3009,3347 and 3654 m,but a different registry was observed at 3980 m of altitude:TPo>TPi>R-P.Through correlation and multiple stepwise regression analysis,it was concluded that active NaHCO_(3)-Pi was the main AP source.It was also suggested that more attention should be given to the ratio of small particle size aggregates to increase soil AP storage.In order to improve the activation capacity and supply of soil P,along with promotion of the healthy development of soil ecosystem on slope land,it was suggest that inorganic P fertilizer and P activator could be added to soil at both low(3009 m)and high altitudes(3980 m).

关键词： Altitude gradient Restored cut slopes Soil aggregates phosphorus fraction available phosphorus

Predicting phosphorus sorption isotherm parameters in soil using data of routine laboratory tests

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Pedosphere 2021年第5期31卷 694-704页

作者： Kathleen S.DUNNE Nicholas M.HOLDEN Karen DALY Teagasc Johnstown CastleEnvironmental Research CentreCo.Wexford Y35TC97(Ireland) UCD School of Biosystems and Food Engineering University College DublinBelfieldDublin 4 D04VIW8(Ireland)

Knowledge of phosphorus(P)sorption dynamics across different soil types could direct agronomic and environmental management of P.The objective of this study was to predict P isotherm parameters for a national soil population using data of routine laboratory tests.Langmuir and Freundlich sorption parameters were calculated from two different ranges(0-25 and 0-50 mg P L^(-1))using an archive of representative agricultural soil types from Ireland.Multiple linear regression(MLR)identified labile forms of aluminium(Al)and iron(Fe),organic matter(OM),cation exchange capacity(CEC),and clay as significant drivers.Langmuir and Freundlich sorption capacities,Freundlich affinity constant,and Langmuir buffer capacity were predicted reliably,with R^(2) of independent validation>0.9.Sorption isotherm parameters were predicted from P sorbed at a single concentration of 50 mg P L^(-1)(S_(50)).An MLR prediction of P sorption maximum in the 0-50 mg P L-1 range was achieved,to an accurate standard,using S_(50),OM,and Mehlich-3 Fe(R^(2) of independent calibration and validation being 0.91 and 0.95,respectively).Using Giles’four shapes of isotherms(C,L,H,and S),L non-strict-and C-shaped isotherm curves accounted for 64% and 27% of the soils,respectively.Hierarchical clustering identified a separation of isotherm curves influenced by two ranges of Mehlich-3 Al.Soils with a low range of Mehlich-3 Al(2.5-698 mg kg^(-1))had no incidence of rapid sorption(C shape).Single point indices,Al,or available soil data make the regression approach a feasible way of predicting Langmuir parameters that could be included with standard agronomic soil P testing.

关键词： available phosphorus binding fertilizer soil test sorption maximum

Regulating Effect of Exogenous Silicon on Soil Fertility in Paddy Fields

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Journal of Northeast Agricultural University(English Edition) 2020年第2期27卷 33-36页

作者： Sun Yan-kun Wang Zhen-hua Li Xue-cong Zhang Xing-wen Ren Hong-yu Jing Yu College of Resources and Environmental Sciences Northeast Agricultural UniversityHarbin 150030China College of Chemistry and Chemical Engineering Harbin Institute of TechnologyHarbin 150001China

In order to explore the effects of different silicon preparations on the soil fertility of paddy fields,a pot experiment with Dongnong 427 was carried on.Different types of silicon preparations,including Si-50-G,Si-60-G,Si-RH,Si-50 and Si-60,were sprayed on the leaves of rice at the tillering stage,and CK was set in the control stage.The contents of alkali nitrogen,available phosphorus,available potassium and available silicon in soil were determined in the tillering stage,booting stage and maturity stage of rice.The results showed that spraying different silicon preparations at the tillering stage could promote the activation and release of soil available nutrients in different degrees.

关键词： rice silicon preparation alkali nitrogen available phosphorus available potassium effective silicon

Application of a Soil Nutrient Measuring Instrument in Vegetable Seedling Substrate

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Meteorological and Environmental Research 2015年第11期6卷 39-42页

作者： Wang Pengcheng Zhang Jian Tian Hongmei Jiang Haikun Wang Yan Wang Mingxia Fang Ling Institute of Horticulture Anhui Academy of Agricultural Sciences Key Laboratory of Genetic Improvement and Ecophysiology of Horticultural Crop in Anhui Province

[Objective] The aim was to find an efficient method to measure available nitrogen, phosphorus and potassium content in vegetable seedling substrate. [ Method] The suitable dosage of leaching agent, ratio of the substrate to water and leaching time for the detection of nutrient contents in the substrate by a soil nutrient measuring instrument were discussed firstly, and then the results of nutrient contents measured by the soil nutrient measuring instrument were compared with that by conventional approaches. [ Result] In compadson with the conventional methods, the av- erage content of available nitrogen measured by the soil nutrient measuring instrument was slightly higher, while the average content of available phosphorus measured by the instrument was lower; the average content of available potassium measured by the instrument was close to that by the conventional method. [ Conclusion] This study could provide us a new method to detect available nitrogen, phosphorus and potassium content in seedling substrate efficiently.

关键词： Soil nutrient measuring instrument Seedling substrate available nitrogen available phosphorus available potassium Measurement method

Activation Effect of Hydrochemical Energy in Regenerative Agriculture on Nutrients of Arsenic Sandstone

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Asian Agricultural Research 2021年第2期13卷 41-42,46页

作者： Tingting MENG Dan WU Shaanxi Provincial Land Engineering Construction Group Co. Ltd.Institute of Land Engineering and TechnologyShaanxi Provincial Land Engineering Construction Group Co.Ltd.Key Laboratory of Degraded and Unused Land Consolidation EngineeringMinistry of Natural ResourcesShaanxi Provincial Land Consolidation Engineering Technology Research CenterXi an 710075China

[Objectives]To study the activation effect of hydrochemical energy in regenerative agriculture on the nutrients of arsenic sandstone.[Methods]Starting from common environmental factors,moisture,it studied the mechanism of the release and activation of N,P,K nutrient elements in arsenic sandstone under different dry and wet environments.[Results]Water played a positive role in activating soil elements.Under the conditions of long-term dryness and alternating dry and wet conditions,the content of total nitrogen,available phosphorus and available potassium coexisted in the 210 d of culture and the element absorption and release,but the overall trend was increasing;under long-term flooding conditions,the content of total nitrogen and available potassium showed an overall increasing trend during the 210 d of culture,but the content of available phosphorus decreased.[Conclusions]Water plays a positive effect on activating soil elements.The research results are expected to provide a certain reference for the application research of water in regenerative agriculture.

关键词： Water Arsenic sandstone Regenerative agriculture Total nitrogen available phosphorus available potassium Nutrient activation