Agronomy research最新文献_第3页

Game species fodder conditions in eastern Siberia and Amur region. 东西伯利亚和阿穆尔河地区野生动物饲料条件。

Agronomy research Pub Date : 2020-01-01 DOI: 10.15159/AR.20.011

A. Ryabchenko, M. Bormotov, A. Senchik, A. M. Pavlov, Y. Guretskaya, V. Glushkov, Y. Sato, H. Igota

{"title":"Game species fodder conditions in eastern Siberia and Amur region.","authors":"A. Ryabchenko, M. Bormotov, A. Senchik, A. M. Pavlov, Y. Guretskaya, V. Glushkov, Y. Sato, H. Igota","doi":"10.15159/AR.20.011","DOIUrl":"https://doi.org/10.15159/AR.20.011","url":null,"abstract":"Hunting farms can serve as a source of primary data on the state of natural resources. Taking into account the increasing anthropogenic impact on the environment, it is necessary to constantly monitor the situation with food for ungulates and predators in order to be able to take timely measures to improve the quality of habitat for wild fauna. Populations of wild large animals live in the host landscapes of so reduced that animals population become extremely vulnerable and unstable, signs of crisis can be seen in the data on the number of animals. Lack of natural food is a serious deterrent, especially in difficult times of the year, such as winter and spring. An analysis of the situation with food for a particular species will allow hunting farms to properly plan their feeding and other activities throughout the year in order to maintain a population of certain species on their territory and minimize the migration of species outside the protected areas. The aim of our work was to create a baseline for tracking data on the characteristics of wildlife animals. The research results allow hunting farms to use the data of animal feeding preferences during different seasons of the year for better organization of their biotechnical measures and improvement of feeding conditions for such species as red deer (Cervus elaphus), elk (Cervus canadensis), roe deer (Capreolus pygargus) and bear(Ursus arctos).","PeriodicalId":7924,"journal":{"name":"Agronomy research","volume":"18 1","pages":"267-289"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66968201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Impact of different fertilisers on elemental content in young hybrid aspen stem wood 不同肥料对杂交杨木幼龄茎材元素含量的影响

Agronomy research Pub Date : 2020-01-01 DOI: 10.15159/AR.20.079

L. Ansone-Bērtiņa, D. Lazdiņa, M. Bertins, A. Viksna, L. Busa, A. Bārdule

{"title":"Impact of different fertilisers on elemental content in young hybrid aspen stem wood","authors":"L. Ansone-Bērtiņa, D. Lazdiņa, M. Bertins, A. Viksna, L. Busa, A. Bārdule","doi":"10.15159/AR.20.079","DOIUrl":"https://doi.org/10.15159/AR.20.079","url":null,"abstract":"The biomass production using fast-growing tree species such as hybrid aspen (Populus tremuloides Michx. x Populus tremula L.) has been recognized as an environmentally friendly and cost-effective approach. Growing these species can reduce the negative impact of earlier land mismanagement and at the same time provide additional biomass growth. The application of fertilisers may introduce not only the necessary macro elements (N, P, K) but also significant amounts of toxic heavy metals. Therefore, the knowledge about elemental flows from fertilised soil to the different parts of hybrid aspen trees is essential and especially meaningful for the evaluation of element content in specific environmental ecosystems. The impact of different fertilisers (sewage sludge, digestate and wood ash) on the concentrations of microand macro elements in the wood of six-year-old hybrid aspen stands grown on former agricultural land was studied. The determination of element concentrations in different tree rings of hybrid aspen trees was accomplished by inductively coupled plasma mass spectrometry (ICP–MS). Isotope ratio mass spectrometry (IRMS) was used to determine the nitrogen and carbon content and isotope ratios in different parts of hybrid aspen trees. Stem disc samples from hybrid aspen trees were obtained from agricultural land in the central part of Latvia. Samples were taken from six-yearold hybrid aspen trees that at the moment of planting were fertilised with sewage sludge, a residue of biogas production (digestate) and wood ash. The obtained results indicated that the chemical element accumulation in hybrid aspen was affected by the applied fertiliser type. In this study, the use of wood ash, as well as digestate, affected the elemental content in hybrid aspen to a greater extent than the use of sewage sludge, relative to unfertilised (control) subplot. The analysed elements varied in the analysed stem plane (across the tree rings). The most significant changes between the rings were observed for the content of K and Ca.","PeriodicalId":7924,"journal":{"name":"Agronomy research","volume":"98 1","pages":"1154-1162"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66969387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Comparative environmental analysis of soil sampling methods in precision agriculture for lime application in Paraná State, Brazil 巴西帕拉纳<e:1>州精准农业施石灰土壤取样方法的比较环境分析

Agronomy research Pub Date : 2020-01-01 DOI: 10.15159/AR.20.101

J. R. M. Gonçalves, G. Ferraz, D. B. Marin, É. F. Reynaldo, P. Ferraz, D. Sarri, M. Vieri

引用次数: 0

Effect of different sugar sources on P. Rhodozyma y1654 growth and astaxanthin production 不同糖源对P. Rhodozyma y1654生长和虾青素产量的影响

Agronomy research Pub Date : 2020-01-01 DOI: 10.15159/AR.20.117

Osman Nabayire Kanwugu, S. Shatunova, T. Glukhareva, E. Kovaleva

{"title":"Effect of different sugar sources on P. Rhodozyma y1654 growth and astaxanthin production","authors":"Osman Nabayire Kanwugu, S. Shatunova, T. Glukhareva, E. Kovaleva","doi":"10.15159/AR.20.117","DOIUrl":"https://doi.org/10.15159/AR.20.117","url":null,"abstract":"Phaffia rhodozyma (also known as Xanthophyllomyces dendrorhous) is one of the most promising natural sources of commercial astaxanthin. It has high growth rates, easy cultivation conditions and able to utilize different carbon substrates. This provides an opportunity to further lower production cost by using industrial waste such as molasses. This research therefore evaluates the growth dynamic and astaxanthin production of P. rhodozyma Y1654 growing on soy and sugar beet molasses-based media. Liquid growth media based on soy molasses (SM), sugar beet molasses (SBM) and glucose (control) as main sugar source with peptone and yeast extract supplementation were inoculated with 48 h old seed culture (grown in standard glucose media: 2.0% glucose, 1.0% peptone, 0.2% yeast extract) and incubated at 20 °C with stirring speed of 180 rpm for 7 days. Samples were taken daily throughout the study period to assess; cell count, dry cell weight (DCW) and amount of astaxanthin. Soy molasses-based media resulted in the highest biomass yield (7.7 g L) followed by SBM (5.8 g L). Generally, more than 90% of initial fermentable sugar was consumed at the end of the study. However, about 40% of total sugar in SM was unassimilable by P. rhodozyma Y1654. The highest astaxanthin yield was observed in the control media (77 µg g of DCW). Cultivation of P. rhodozyma Y1654 in SBM resulted in as much as twice (32.8 µg g of DCW) the astaxanthin yield of SM (12.4 µg g DCW). Molasses-based media are good for growth of P. rhodozyma Y1654 but for astaxanthin production, they need further optimization.","PeriodicalId":7924,"journal":{"name":"Agronomy research","volume":"18 1","pages":"1700-1716"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66970555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Seed size and cold stratification affect Acer negundo and Acer ginnala seeds germination 种子大小和冷分层影响黑槭和银杏种子的萌发

Agronomy research Pub Date : 2020-01-01 DOI: 10.15159/AR.20.153

O. Kiseleva, D. Veselkin, O. Loretts

{"title":"Seed size and cold stratification affect Acer negundo and Acer ginnala seeds germination","authors":"O. Kiseleva, D. Veselkin, O. Loretts","doi":"10.15159/AR.20.153","DOIUrl":"https://doi.org/10.15159/AR.20.153","url":null,"abstract":"The aim of this work is to determine how the germination of seeds of the invasive tree Acer negundo depends on the period of cold stratification under the snow and the duration of stratification in the air on the branches of the trees. For comparison with A. negundo, we used seeds of Acer ginnala, introduced but not invasive tree in the Middle Urals. The period of stratification in the air modeled by collecting seeds in October and December. The duration of cold stratification under the snow was 0, 1, 2, 3 and 4 months. We hypothesized that the duration of stratification in the air did not affect the germination of A. negundo and A. ginnala seeds. Cold stratification under the snow had a positive effect on seed germination of both species. The best seed germination of A. negundo and A. ginnala was after 4 months of cold stratification under the snow, the germination rate differs: in A. negundo 12 ± 4% (small seeds) and 79 ± 7% (large seeds), in A. ginnala – 1 ± 2% (small seeds) and 18 ± 4% (large seeds). In both species, large seeds germinated at 7 to 18 times more intensively than small ones. In A. ginnala case, even after cold stratification under snow for 4 months, no more than 22% of the seeds germinated. The germination of A. ginnala seeds was 4–5 times lower than that of A. negundo seeds.","PeriodicalId":7924,"journal":{"name":"Agronomy research","volume":"18 1","pages":"461-471"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66971356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Production of cellulose nanostructures from Chilean bamboo, Chusquea quila 用智利竹子生产纳米纤维素结构

Agronomy research Pub Date : 2020-01-01 DOI: 10.15159/AR.20.193

W. Gacitúa, O. Rojas, P. Oliveira, X. Petit-Breuilh

{"title":"Production of cellulose nanostructures from Chilean bamboo, Chusquea quila","authors":"W. Gacitúa, O. Rojas, P. Oliveira, X. Petit-Breuilh","doi":"10.15159/AR.20.193","DOIUrl":"https://doi.org/10.15159/AR.20.193","url":null,"abstract":"In Chile, bamboo bushes of Chusquea quila genus (or popularly known as ‘quila’) have brought economic and ecological problems for decades in the south-central part of this country. On the other hand, this plant species was studied as a raw material for the production of nanofibrillated cellulose (CNF) and nanocrystalline cellulose (CNC), presenting an opportunity for sustainable and environmentally friendly management, positioning Chile as a Latin American country at the forefront of studies with nanotechnological approaches. The methodology applied to generate these nanostructures contemplated hydrolysis with sulfuric acid and oxalic acid, in addition to an intermediate stage of microfluidization to generate nanofibrillated cellulose. The products obtained showed morphological and topographic homogeneity in the scanning electron microscopy (SEM) and atomic force microscopy (AFM) images. The diameter values of the particles ranged from 10 to 20 nanometers for the CNCs. Through Fourier transformed spectrophotometry (FTIR) it was found that the processes of microfluidization and acid hydrolysis did not affect the molecular shape of the nanostructures and X-ray diffraction (XRD) was important to determine crystallinity index (IC), presenting values higher than 80%.","PeriodicalId":7924,"journal":{"name":"Agronomy research","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66971567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Genetic components for fodder yield and agronomic characters in maize lines 玉米品系饲料产量和农艺性状的遗传组成

Agronomy research Pub Date : 2020-01-01 DOI: 10.15159/AR.20.001

Alfonso López-Benítez, C. Petroli, O. Antuna-Grijalva, Sa Rodríguez-Herrera, O. Gayosso-Barragán, M. P. Luévanos-Escareño, A. J. L. Río, A. Mancera-Rico

{"title":"Genetic components for fodder yield and agronomic characters in maize lines","authors":"Alfonso López-Benítez, C. Petroli, O. Antuna-Grijalva, Sa Rodríguez-Herrera, O. Gayosso-Barragán, M. P. Luévanos-Escareño, A. J. L. Río, A. Mancera-Rico","doi":"10.15159/AR.20.001","DOIUrl":"https://doi.org/10.15159/AR.20.001","url":null,"abstract":"In maize hybrid development, it is essential to know the parent’s performance per se in different environments as well as the genetic base in populations in order to facilitate selection of superior lines. The objective of this work was to estimate the genetic variance and heritability while assessing agronomic behavior in 237 maize fodder lines featuring different inbred levels and origin in two different locations. Traits such as plant height, cob height, stem diameter, and fodder yield were taken. A combined variance analysis was carried out using this information. The variable mean squares showing significant differences were used to estimate the genetic variance components. Significant differences were observed (p ≤ 0.01) for the line variation source and location × line interaction in all assessed characteristics. The genetic parameter estimation provided information on the existing genetic variance and heritability among the population which is important for the progress of the selection process. Lines CLWN701, CLWN345, CML476, CML216, CLWQ232, and CML 528 measured 74.8, 72.2, 67.7, 65.8, 63.8 and 62.5 t ha, respectively showed the highest yield potential for green fodder.","PeriodicalId":7924,"journal":{"name":"Agronomy research","volume":"24 1","pages":"77-87"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66968138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Physiological indicators and yield of the Chinese cabbage cultivated at different soil water tensions. 不同土壤水分胁迫下大白菜的生理指标及产量。

Agronomy research Pub Date : 2020-01-01 DOI: 10.15159/AR.20.013

D. Paulus, I. C. Zorzzi, D. Becker, G. A. Nava, A. L. D. Paula, F. M. D. Paula

{"title":"Physiological indicators and yield of the Chinese cabbage cultivated at different soil water tensions.","authors":"D. Paulus, I. C. Zorzzi, D. Becker, G. A. Nava, A. L. D. Paula, F. M. D. Paula","doi":"10.15159/AR.20.013","DOIUrl":"https://doi.org/10.15159/AR.20.013","url":null,"abstract":"The development and yield of Chinese cabbage is influenced by soil moisture. The objective of this study was to evaluate the physiological indicators, development, and yield of Chinese cabbage (Brassica rapa subsp. pekinensis (Lour.) Rupr.) grown at different soil water tension ranges. Two experiments were conducted (2016–2017) in the Olericulture Sector of the Federal University of Technology of Paraná. Two cultivars of the Chinese cabbage, Eikoo and Kinjitsu, and four soil water tension ranges 13–17, 23–27, 33–37, and 43–47 kPa were studied. Eikoo presented higher relative chlorophyll index, photosynthesis, and fresh leaf mass than did Kinjitsu. Physiological indicators transpiration (5.8 mmol H2O m s), photosynthesis (14.5 μmol CO2 m s), stomatal conductance (0.31 mol H2O m s), and WUE (39.4 kg m) were higher at 13–17 kPa soil water tension. Soil water tension ranges with high water restrictions reduced the fresh leaf mass of both cultivars. Fresh leaf mass decreased by 236.2 and 191.7 g plant in the highest soil water tension range in 2016 and 2017, respectively, when compared with the fresh leaf mass at the 13–17 kPa tension range. The lowest water consumption was observed at the 13–17 kPa tension range. The year 2017 resulted in higher internal CO2 concentration, transpiration rate, fresh leaf mass, number of irrigations and water consumption compared to the year 2016. Thus, the irrigation regime for the most optimal Chinese cabbage cultivation should maintain the soil water tension range at 13–17 kPa.","PeriodicalId":7924,"journal":{"name":"Agronomy research","volume":"18 1","pages":"241-255"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66968212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Restricting the eligible maintenance practices of permanent grassland - a realistic way towards more active farming? 限制永久草地的维护实践——实现更积极农业的现实途径?

Agronomy research Pub Date : 2020-01-01 DOI: 10.15159/AR.20.018

A. Viira, K. Kall, Jelena Ariva, L. Oper, E. Jürgenson, S. Maasikamäe, R. Põldaru

{"title":"Restricting the eligible maintenance practices of permanent grassland - a realistic way towards more active farming?","authors":"A. Viira, K. Kall, Jelena Ariva, L. Oper, E. Jürgenson, S. Maasikamäe, R. Põldaru","doi":"10.15159/AR.20.018","DOIUrl":"https://doi.org/10.15159/AR.20.018","url":null,"abstract":"As a result of agricultural, land and ownership reforms coupled with liberal agricultural policy during the transition, agricultural land use in Estonia became more fragmented. A significant portion of agricultural land users are now considered passive farmers who maintain their agricultural land (often permanent grasslands) in good agricultural and environmental conditions and are therefore eligible for single area and greening payment. The maintenance of permanent grassland is one of the objectives of the EU Common Agricultural Policy (CAP), which contributes to the overall climate and biodiversity objectives of the EU. Until 2014, in Estonia, the minimum eligible activity for the maintenance of permanent grassland was to cut the grass and leave it on the ground. In 2015 and 2016, the area on which the cut grass could be left on the ground was restricted in order to increase incentives for more active agricultural land use. This paper analyses the likely effects of such restriction on the use and maintenance of permanent grasslands. The results of the study show that in the case of restrictions on the eligible practices of permanent grassland maintenance, passive land users as well as crop and mixed crop-livestock farms are likely to reduce the area of permanent grasslands (shrinking farms). At the same time, grazing livestock farms (expanding farms) would be willing to expand their permanent grassland area. More than 70% of the permanent grasslands of shrinking farms are located within 1 km and more than 90% within 2 km of expanding farms. However, in some regions it is likely that the maintenance of permanent grasslands is stopped as a result of the restrictions. It is argued that if permanent grasslands are to be maintained, it is necessary to introduce supports for grazing livestock farms, targeted supports for passive land users for their maintenance or more comprehensive land use policy that takes the climate change mitigation requirements into account.","PeriodicalId":7924,"journal":{"name":"Agronomy research","volume":"18 1","pages":"1556-1572"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66968290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Enrichment of the low-fat yoghurt with oat β-glucan and EPS-producing Bifidobacterium bifidum improves its quality. 在低脂酸奶中添加燕麦β-葡聚糖和产生eps的两歧双歧杆菌，可提高酸奶的品质。

Agronomy research Pub Date : 2020-01-01 DOI: 10.15159/AR.20.024

I. Jõudu, N. Barakova, M. Ibrahim

{"title":"Enrichment of the low-fat yoghurt with oat β-glucan and EPS-producing Bifidobacterium bifidum improves its quality.","authors":"I. Jõudu, N. Barakova, M. Ibrahim","doi":"10.15159/AR.20.024","DOIUrl":"https://doi.org/10.15159/AR.20.024","url":null,"abstract":". The addition of β -glucan or EPS-producing bacteria is mainly used to improve the quality and the acceptability of low-fat yoghurt. The purpose of this study was to investigate the effect of adding β -glucan, EPS-producing Bifidobacterium bifidum , or both on physical properties, fermentation time, and organoleptic criteria of low-fat yoghurt, additionally to the viability of L. bulgaricus and B. bifidum . Two types of low-fat yoghurt (1.5% fat) were prepared, with the addition of standard oat β -glucan by 0.15% or without its addition. Each type of yoghurt mixture was inoculated with two kinds of starters: traditional and probiotic ( B. bifidum ) culture. The physicochemical properties, the count of viable bacterial starter culture, and the organoleptic evaluation for all yoghurt types were evaluated after storage 24 h at 4 °C. Moreover, the fermentation time was monitored. The incorporation of both β -glucan and EPS in yoghurt resulted in the highest viscosity (13.7 mPa.s) and WHC (55.94%), besides to the lowest syneresis (28.47%). The acidity and pH of the yoghurt samples were significantly affected ( p > 0.05) by the β -glucan addition. The yoghurt type Bifidobacterium glucan had the shortest fermentation time (215 min), and the maximum viability of both B. bifidum (7.63 Log CFU g -1 ) and L. bulgaricus (7.50 Log CFU g -1 ). The β -glucan had a pronounced effect on the overall acceptability of yoghurt more than the EPS. In conclusion, enriching the low-fat yoghurt with oat β -glucan and EPS-producing B. bifidum is the highest effective method for improving the yoghurt’s quality and the viability of probiotics.","PeriodicalId":7924,"journal":{"name":"Agronomy research","volume":"18 1","pages":"1689-1699"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66968323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2