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soil Ecology Letters 2021年第4期3卷 342-355页

作者： Ziheng Peng Zhifeng Wang Yu Liu Tongyao Yang Weimin Chen Gehong Wei Shuo Jiao State Key Laboratory of Crop Stress Biology in Arid Areas Shaanxi Key Laboratory of Agricultural and Environmental MicrobiologyCollege of Life SciencesNorthwest A&F UniversityYangling 712100China

Uncovering the mechanisms underlying the diversity patterns of abundant and rare species is crucial for terrestrial biodiversity ***,the response of abundant and rare community assembly to ecological succession has not been explored,particularly considering soil *** 300 soil samples were collected from reforestation ecosystems from depths of up to 300 cm and horizontal distances of 30–90 cm from a *** revealed that soil phosphorus not only affected alpha diversity and community structure,but also mediated the balance of stochastic and deterministic processes for abundant and rare sub-communities,which exhibited contrasting assembly *** abundant sub-community changed from variable selection to stochasticity with the increase of phosphorus,while the rare sub-community shifted from homogeneous selection to *** limitation was the main assembly process in the abundant sub-community,while the rare sub-community was governed primarily by homogeneous ***,the relative influence of deterministic processes increased with succession for both *** the scale of a single tree,stochastic processes increased with soil depth in rare sub-community,while deterministic processes increased with the radius from a single tree in the abundant sub***,our results highlight the importance of the soil phosphorus-driven assembly process in understanding the re-assembly and maintenance of soil bacterial diversity.

关键词： Rare bacteria Reforestation soil profiles Community assembly soil phosphorus Semi-arid

Effect of Land Cover Change on soil phosphorus Fractions in Southeastern Horqin Sandy Land, Northern China

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Pedosphere 2008年第6期18卷 741-748页

作者： ZHAO Qiong ZENG De-Hui FAN Zhi-Ping D. K. LEE Daqinggou Ecological Station Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 （China） Graduate University of the Chinese Academy of Sciences Beijing 100039 （China） Department of Forest Sciences Seoul National University Seoul-151- 921 （Repubiic of Korea）

In the past 50 years, large areas of the Horqin sandy land were afforested to prevent desertification. Although the afforestation policy appears successful, many people now doubt whether it is suitable to plant trees with high density on the poor soils in semiarid regions. Little is known about the impacts of afforestation on the sandy soil properties, although the evaluation of these impacts is fundamental to judge the rationality of afforestation policy. soil phosphorus （P） fractions, acid phosphomonoesterase activities, and other soil chemical properties were compared among five adjoining typical ecosystems on poor sandy soils in southeastern Horqin sandy land. The ecosystems studied are natural elm savanna, degraded grassland, Mongolian pine （Pinus sylvestris var. mongolica） plantation, Chinese pine （Pinus tabulaeformis） plantation, and mixed plantation of Mongolian pine and poplar （Populus simonii）. The results showed that organic P dominated soil P （47%-65%） was the principal source of available P. The degradation of elm savanna to grassland significantly reduced soil pH and resulted in an overall reduction in soil fertility, although slightly increased labile inorganic P. Grassland afforestation had no significant influence on soil pH, organic carbon, and total N but significantly reduced total P. Impacts of grassland afforestation on soil P fractions depended on tree species. Natural elm savanna had higher soil P conserving ability than artificial plantations. Therefore, with the aim of developing a sustainable ecosystem, we suggested that vegetations with low nutrient demand （particularly P） and efficient nutrient cycling would be more suitable for ecosystem restoration in the semiarid region.

关键词： afforestation Horqin sandy land soil phosphorus vegetation restoration

Bioavailable phosphorus distribution in alpine meadow soil is affected by topography in the Tian Shan Mountains

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Journal of Mountain Science 2020年第2期17卷 410-422页

作者： LI Fa-Yong YUAN Cheng-yu YUAN Zi-Qiang YOU Yong-jun HU Xue-fei WANG Shan LI Guo-yu College of Water Resources and Architectural Engineering Tarim UniversityXinjiang 843300China State Key Laboratory of Frozen soil Engineering Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhouGansu 730000China

phosphorus(P) bioavailability is an important factor in alpine meadows and plays an important role in the response to climate change and the maintenance of ecosystem ***,little is known about how environmental factors,such as elevation and slope aspect,affect soil P *** explored the effects of elevational gradient and slope aspect on different forms of P and P availability in the alpine meadows on the southern slope of the Tian Shan Mountain *** P was found to be 851.9-1556.7 mg·kg^(-1) at different elevational gradients and 437.5-1547.0 mg·kg^(-1) at different slope aspects,and highest at 3337 and 3652 m.a.s.l.,but little differences between slope *** P and Labile P linearly increased with the elevational *** valley and the base of the shady slope had higher contents of H_***_3-Pi,and NaHCO_3-Po,and high-active organic P(NaHCO_3-Po,NaOH-Po,and H_2O-Po) was positively correlated with soil total carbon(TC),total nitrogen(TN),soil organic carbon(SOC),and aboveground biomass(AGB),but was negatively correlated with pH,aluminum(Al),and calcium(Ca) at different elevational ***-active bioavailable P(H_2OPi,H_2O-Po,NaHCO_3-Pi,and NaHCO_3-Po) was positively correlated with soil SOC and AGB and was negatively correlated with pH at different slope *** results suggest that soil P availability in alpine meadows is significantly controlled by topographical factors and the valleys and base of shady slopes are reservoirs of high-active bioavailable P.

关键词： soil phosphorus Altitude Shady aspect Sunny aspect phosphorus forms

Effects of Two Chelating Agents on Availability of Calcium and phosphorus in Black soil of Vegetable Fields

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Journal of Northeast Agricultural University(English Edition) 2020年第4期27卷 44-54页

作者： Dai Jian-jun Wang Xiao-chun Fang Qiu-na Liu Hong-fei Liu Li-zhi College of Resources and Environmental Sciences Northeast Agricultural UniversityHarbin 150030China

To explore the effects of the two chelating agents on the availability of calcium and phosphorus in black soil of vegetable fields and the growth of cabbage(Brassica pekinensis Rupr.)seedlings,humic acid(F)and ethylene diamine tetraacetic acid disodium salt(EDTA)were used as experiment materials,and two factors and three levels completely randomized experiment of the nine treatments was *** experiments were carried out by soil incubation experiment and pot experiment to investigate the effects of the two chelating agents with different ratios and their interaction on soil and *** results showed that there were very significant differences among soil pH,soil available phosphorus content,cabbage biomass,calcium and phosphorus accumulation of cabbage under the interaction of the two chelating *** could improve pH of the soil and reduce the electric conductivity(EC)value of soil,when applied chelating agents of different *** EC value of soil fluctuated during the incubation *** were significant differences between pH and EC in the early incubation period,but there was no significant difference in the later *** there were significant differences between soil available calcium and available phosphorus content;there were significant differences between cabbage biomass and the accumulation of calcium and phosphorus in cabbage,and the data of F2E2 treatment were significantly higher than those of other *** summary,under the conditions of the experiment,the available phosphorus content of black soil in vegetable fields,the biomass and accumulation of calcium and phosphorus in cabbage increased significantly in F2E2 treatment(appied 675 kg•hm-2 of lime,300 kg•hm-2 of humic acid and 150 kg•hm-2 of EDTA).

关键词： humic acid EDTA soil calcium soil phosphorus cabbage seedling

soil Nutrient Variance by Slope Position in a Mollisol Farmland Area of Northeast China

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Chinese Geographical Science 2016年第4期26卷 508-517页

作者： ZHANG Shaoliang JIANG Lili LIU Xiaobing ZHANG Xingyi FU Shicong DAI Lin College of Resource and Environment Northeast Agricultural University Harbin 150030 China Harbin Normal University Harbin 150025 China Northeast Institute of Geography and Agroecology Chinese Academy of Sciences Harbin 150081 China

In order to generate scientifically-based comparative information to improve fertilization efficiency and reduce nutrient loss, 610 samples of 122 soil profiles were collected at the 0–60 cm depth to compare soil nutrient contents including soil organic matter(SOM), total nitrogen(TN), total phosphorus(TP), available phosphorus(AP), and available potassium(AK) among different slope positions in a Mollisol farmland area of Northeast China. The contents of SOM and TN typically decreased with increased soil depth at back and bottom slope. soil loss and deposition tended to decrease SOM and TN at the 0–20 cm soil depth on both the back slope and the slope bottom. The TP firstly decreased from 0–20 cm to 30–40 cm, and then not constantly increased at the back slope and the bottom slope. Due to the characteristics of soil nutrients and crop absorption, the contents of both AP and AK were typically the highest at the summit, followed by the slope bottom and the back slope in the 0–20 cm layer. Generally, in order to sustain the high soil productivity and protect the environment, attention should be paid to soil conservation on back slope; in addition, additional N and P fertilizer is necessary on the back slope.

关键词： soil organic matter soil nitrogen soil phosphorus soil potassium slope position Mollisols China

Dynamics of soil quality after cropland was converted to natural regeneration and alfalfa in the emiarid Loess Plateau

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Dynamics of soil quality after cropland was converted to nat...

Effects of Introduction of Two Kinds of Legume Species on soil Quality in Semiarid Loess Plateau

土肥水资源高效利用与农业面源污染防控技术研讨会

作者：郭志彬 MOE Key Laboratory of Arid Agroecology School of Life ScienceLanzhou University soil and Fertilizer Research Institute Anhui Academy of Agricultural Sciences

Cropland has suffered from extensive tillage and degraded severely in the semiarid Loess Plateau of *** improve the agro-ecosystem and develop sustainable agriculture,this experiment was *** 2003,cropland was enclosed with two treatments:one was natural regeneration(NR),and the other was alfalfa which is a perennial legume specie planted into the cropland at a density of 22.5 kg *** four-year treatment,the soil total carbon (STC) and light fraction organic carbon(LFOC) increased significantly in both NR and ***,there were no significant differences between NR and AF on the soil organic carbon(SOC).In the fragile semiarid areas,alfalfa growth helped improve soil total nitrogen(TN),but exploited amount of soil available phosphorus(AP).Compared to NR,the ratios of soil organic carbon to available phosphorus(C/P) in AF was significantly higher in 2007,which indicated the low AP content would result in degradation of alfalfa *** AP was the limited factor for plant growth and soil ***,the results suggested that changes in land use from cropland to NR and AF both helped improve soil C pools,but P fertilizer was required for plant growth.

关键词： alfalfa soil total carbon soil organic carbon light fraction organic matter light fraction organic carbon total nitrogen soil phosphorus

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Agricultural Science & Technology 2013年第2期14卷 384-388页

作者：郭志彬王道中安徽农业科学研究院土壤肥料研究所安徽合肥230031 安徽省养分循环与资源环境省级重点实验室安徽合肥230031

[Objective] The study aimed to find an efficient and sustainable way to improve the degraded soil quality in the semiarid Loess Plateau. [Method] This study was done with three treatments：（1） the perennial legume species alfalfa （Medicago sativa L.）（AF） planted at a density of 22.5 kg/hm 2 ; （2） the biennial legume species sweetclover （Melilotus officinalis L.）（SF） planted at a density of 11.3 kg/hm 2 ; and （3） natural regeneration （NR）. [Result] It is found that NR helped improve deep soil water but with the lowest aboveground biomass. In contrast, AF has the lowest soil water content but with the highest aboveground biomass. Furthermore, in contrast to SF, NR and AF have a higher soil organic carbon and total nitrogen. However, there were no significant differences on soil total and available phosphorus, and soil microbial biomass among all the treatments. As the experiment lasts, AP decreased significantly in all treatments in comparison with their initial values at the beginning of the experiment in 2003. [Conclusion] NR was the best way to restore the deep soil water among all the treatments, and phosphorus fertilizer was necessary for the sustainable development of agricultural production. This research provides a valuable example of soil quality restoration in semiarid regions.

关键词： Alfalfa Sweetclover soil total nitrogen soil phosphorus soil organic carbon soil water content