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Effect of Weather During Spring on the Time of Arrival of Bird Cherry-oat Aphid (Rhopalosiphum padi L.) in Spring Barley (Hordeum vulgare L.) Fields 春季天气对春大麦中鸟樱蚜(Rhopalosiphum padi L.)到达时间的影响字段
IF 1.6 4区 农林科学
Acta Agriculturae Scandinavica Section B-Soil and Plant Science Pub Date : 1999-06-01 DOI: 10.1080/09064719950135632
L. M. Hansen
{"title":"Effect of Weather During Spring on the Time of Arrival of Bird Cherry-oat Aphid (Rhopalosiphum padi L.) in Spring Barley (Hordeum vulgare L.) Fields","authors":"L. M. Hansen","doi":"10.1080/09064719950135632","DOIUrl":"https://doi.org/10.1080/09064719950135632","url":null,"abstract":"Bird cherry-oat aphid is the principal pest of spring barley in Denmark. The time of arrival in the fields is an important element in deciding whether chemical control is needed. This paper describes a regression model managed by climate variables, which incorporate the biology of the bird cherry-oat aphid on its primary host, the bird cherry (Prunus padus L.). In the period 1987-1998, three to nine spring barley fields were monitored annually for the first occurrence of bird cherry-oat aphid. Different climatic variables were analysed in relation to the time of arrival, with a view to constructing a model. The analysis showed good correlation between the date of arrival into the fields after 1 May (D), day-degrees (DD) in February (TF), DD in March (TM), DD in April (TA), precipitation in April (PA) and precipitation in May until 15th (PM) according to the following model: D = 0.61TF - 0.17TM + 0.30TA - 0.46PA + 1.85PM (r 2=0.98, P<0.001, df=51). DD were calculated with a threshold temperature of 3°C. It...","PeriodicalId":40817,"journal":{"name":"Acta Agriculturae Scandinavica Section B-Soil and Plant Science","volume":"52 9","pages":"117-121"},"PeriodicalIF":1.6,"publicationDate":"1999-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/09064719950135632","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72368876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Comparison of Three Indirect Methods for Prediction of Herbage Mass on Timothy-Meadow Fescue Pastures 三种间接预测草甸羊茅草场牧草质量的方法比较
IF 1.6 4区 农林科学
Acta Agriculturae Scandinavica Section B-Soil and Plant Science Pub Date : 1999-06-01 DOI: 10.1080/09064719950135579
P. Virkajärvi
{"title":"Comparison of Three Indirect Methods for Prediction of Herbage Mass on Timothy-Meadow Fescue Pastures","authors":"P. Virkajärvi","doi":"10.1080/09064719950135579","DOIUrl":"https://doi.org/10.1080/09064719950135579","url":null,"abstract":"A comparison of a disk meter, sward stick and capacitance meter was conducted to determine the prediction ability of different methods for estimation of herbage mass (HM) on timothy (Phleum pratense L.)-meadow fescue (Festuca pratensis Huds.) pastures. A total of 714 paired observations was made on each instrument and corresponding cut HM (<1 cm). The variation in HM was adequately explained by linear models. Comparison was made separately for each occasion (DAY) since DAY had a significant influence on the parameter estimates for the sward stick and capacitance meter. The r 2 values varied between 0 and 0.91 and the residual standard deviations (RSD) between 132 and 1151 kg ha-1. The disk meter and the sward stick predicted most accurately HM kg ha-1, while the capacitance meter was the least accurate. The advantage of the disk meter was the stability of model parameters from day to day. The advantage of the sward stick is that the readings can be applied directly into practice. None of the methods is re...","PeriodicalId":40817,"journal":{"name":"Acta Agriculturae Scandinavica Section B-Soil and Plant Science","volume":"76 1","pages":"75-81"},"PeriodicalIF":1.6,"publicationDate":"1999-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74237582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 29
Soil respiration in three soil types in agricultural ecosystems in Finland 芬兰农业生态系统中三种土壤类型的土壤呼吸
IF 1.6 4区 农林科学
Acta Agriculturae Scandinavica Section B-Soil and Plant Science Pub Date : 1999-06-01 DOI: 10.1080/09064719950135560
H. Koizumi, M. Kontturi, S. Mariko, T. Nakadai, Y. Bekku, T. Mela
{"title":"Soil respiration in three soil types in agricultural ecosystems in Finland","authors":"H. Koizumi, M. Kontturi, S. Mariko, T. Nakadai, Y. Bekku, T. Mela","doi":"10.1080/09064719950135560","DOIUrl":"https://doi.org/10.1080/09064719950135560","url":null,"abstract":"Seasonal changes in soil respiration (SR), soil temperature (ST) and soil water content (SWC) were monitored in three different soil types (peat, sand and clay soils) in Finnish agricultural ecosystems. Rates of CO2 emission were measured by the closed chamber method using an infrared gas analyser (IRGA) at intervals of 2-3 weeks from May to October. The seasonal changes in SR were different among the soil types: peat soil, maximum rate (650 mg CO2 m-2 h-1) in summer, positive significant relation between SR and ST and negative relation between SR and SWC; sandy soil, stable SR (300 mg CO2 m-2 h-1) without seasonal changes, positive relation between SR and SWC and no significant relation between SR and ST; clay soil, maximum rate (500 mg CO2 m-2 h-1) in summer, highly positive significant relation between SR and ST and negative relation between SR and SWC. A statistical model was developed to predict the amount of CO2 evolved from the cultivated soils based on the relationships between SR and certain abio...","PeriodicalId":40817,"journal":{"name":"Acta Agriculturae Scandinavica Section B-Soil and Plant Science","volume":"22 1","pages":"65-74"},"PeriodicalIF":1.6,"publicationDate":"1999-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79977492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 50
Effects of Low Temperatures on Changes in Oligosaccharides, Phenolics and Peroxidase in Inner Bud of Onion Allium cepa L. During Break of Dormancy 低温对葱休眠结束时内芽中寡糖、酚类物质和过氧化物酶变化的影响
IF 1.6 4区 农林科学
Acta Agriculturae Scandinavica Section B-Soil and Plant Science Pub Date : 1999-06-01 DOI: 10.1080/09064719950135605
N. Benkeblia, G. Selselet-Attou
{"title":"Effects of Low Temperatures on Changes in Oligosaccharides, Phenolics and Peroxidase in Inner Bud of Onion Allium cepa L. During Break of Dormancy","authors":"N. Benkeblia, G. Selselet-Attou","doi":"10.1080/09064719950135605","DOIUrl":"https://doi.org/10.1080/09064719950135605","url":null,"abstract":"The effects of low temperatures on the break of dormancy of onion bulbs and changes in oligosaccharides, phenolics and peroxidase activity were examined. Cold treatment at 9°C was more effective on break of dormancy than at 0°C, but in both cases cold temperatures caused a rapid break of dormancy. Changes in oligosaccharides and glucose were linked to sprouting stages, with higher concentrations at the onset of sprouting for cold treatments of 9°C for 3 weeks and 0°C for 2 weeks; for the other treatments (9°C for 2 weeks and 0°C for 3 weeks) the high concentrations were reached after sprouting. There was an inverse relation between sprouting on the one hand, and phenolics and peroxidase activity on the other hand. These results emphasized a positive effect of low temperature on breaking dormancy of onion bulbs and the negative role of phenolics and peroxidase on inner bud development.","PeriodicalId":40817,"journal":{"name":"Acta Agriculturae Scandinavica Section B-Soil and Plant Science","volume":"172 1","pages":"98-102"},"PeriodicalIF":1.6,"publicationDate":"1999-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76461230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 34
Soil Nitrogen Depletion by Vegetable Crops with Variable Root Growth 变根蔬菜作物土壤氮素耗竭研究
IF 1.6 4区 农林科学
Acta Agriculturae Scandinavica Section B-Soil and Plant Science Pub Date : 1999-06-01 DOI: 10.1080/09064719950135597
K. Thorup-Kristensen, J. N. Sørensen
{"title":"Soil Nitrogen Depletion by Vegetable Crops with Variable Root Growth","authors":"K. Thorup-Kristensen, J. N. Sørensen","doi":"10.1080/09064719950135597","DOIUrl":"https://doi.org/10.1080/09064719950135597","url":null,"abstract":"The ability of carrot, leek and white cabbage to deplete the soil inorganic nitrogen (N) pool was studied. All three crops are late-harvested crops with a long growing season, but they have been found to have very different root growth. At their optimal N supply, carrot left 27 kg nitrate-N ha-1 in the top 100 cm of the soil, leek left 87 kg N ha-1 and white cabbage left only 11 kg N ha-1, in accordance with previously published differences in rooting depth among the three crops. Compared at a supply of 160 kg N ha-1, 52, 65 and 4 kg nitrate-N ha-1 was left in the soil by carrot, leek and white cabbage respectively. Apart from an extensive root system, white cabbage also had a much higher N-uptake capacity than the two other crops. The significance of differences in root growth, N-uptake capacity and other factors in determining the ability of the three crops to deplete the soil inorganic N pool is discussed.","PeriodicalId":40817,"journal":{"name":"Acta Agriculturae Scandinavica Section B-Soil and Plant Science","volume":"65 1","pages":"92-97"},"PeriodicalIF":1.6,"publicationDate":"1999-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80202120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 40
Effects of Different Carbon Dioxide and Ozone Concentrations on Shoot Growth of Phleum pratense L. and Betula pubescens Ehrh. as Influenced by Day Length and Irradiance 不同浓度二氧化碳和臭氧对白桦和短毛桦茎部生长的影响。受白昼长度和辐照度的影响
IF 1.6 4区 农林科学
Acta Agriculturae Scandinavica Section B-Soil and Plant Science Pub Date : 1999-03-01 DOI: 10.1080/09064719950135704
L. Mortensen
{"title":"Effects of Different Carbon Dioxide and Ozone Concentrations on Shoot Growth of Phleum pratense L. and Betula pubescens Ehrh. as Influenced by Day Length and Irradiance","authors":"L. Mortensen","doi":"10.1080/09064719950135704","DOIUrl":"https://doi.org/10.1080/09064719950135704","url":null,"abstract":"Seedlings of Phleum pratense L. (timothy) and Betula pubescens Ehrh. (mountain birch) were grown for 37 or 42 days at all combinations of two CO2","PeriodicalId":40817,"journal":{"name":"Acta Agriculturae Scandinavica Section B-Soil and Plant Science","volume":"9 1","pages":"50-56"},"PeriodicalIF":1.6,"publicationDate":"1999-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88628535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Foliar Injuries Caused by Ozone in Betula pubescens Ehrh. and Phleum pratense L. as Influenced by Climatic Conditions Before and During O3 Exposure 臭氧对短毛桦树叶片的伤害。臭氧暴露前和暴露期间气候条件的影响
IF 1.6 4区 农林科学
Acta Agriculturae Scandinavica Section B-Soil and Plant Science Pub Date : 1999-03-01 DOI: 10.1080/09064719950135696
L. Mortensen
{"title":"Foliar Injuries Caused by Ozone in Betula pubescens Ehrh. and Phleum pratense L. as Influenced by Climatic Conditions Before and During O3 Exposure","authors":"L. Mortensen","doi":"10.1080/09064719950135696","DOIUrl":"https://doi.org/10.1080/09064719950135696","url":null,"abstract":"Seedlings of Betula pubescens Ehrh. (mountain birch) and Phleum pratense L. (timothy) were grown for 42 days under full light or 50% shade in the field at 12°C, and at comparable photosynthetic active radiation (PAR) levels in a greenhouse at 18°C. Plants from the four pretreatments were exposed to 78 nmol mol-1 (ppb) O3 (8 h day-1) under two temperatures (15 and 25°C), two relative air humidities (50 and 80% RH) or two CO2","PeriodicalId":40817,"journal":{"name":"Acta Agriculturae Scandinavica Section B-Soil and Plant Science","volume":"1 1","pages":"44-49"},"PeriodicalIF":1.6,"publicationDate":"1999-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83658795","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Long-term Stability of Manganese(III) Complexes in Aqueous Soil Slurries 锰(III)配合物在土壤水泥浆中的长期稳定性
IF 1.6 4区 农林科学
Acta Agriculturae Scandinavica Section B-Soil and Plant Science Pub Date : 1999-03-01 DOI: 10.1080/09064719950135687
P. Schuisky, Ann-Sofi Ullström, I. Persson
{"title":"Long-term Stability of Manganese(III) Complexes in Aqueous Soil Slurries","authors":"P. Schuisky, Ann-Sofi Ullström, I. Persson","doi":"10.1080/09064719950135687","DOIUrl":"https://doi.org/10.1080/09064719950135687","url":null,"abstract":"The long-term stability of some manganese(II) and (III) complexes in soil slurries was studied. The thermodynamically very stable manganese(III) complexes with X,X'-[alkylenebis(iminomethyl)]-2,2'-dihydroxybenzoate, X,X'=2-7 (1-6), were stable in aqueous sandy loam slurries with pH 6 for months and up to 3 weeks in an aqueous slurry of calcareous clay with pH 7.5. The addition of manganese(III) 1-6 complexes to aqueous soil slurries caused no exchange reactions with iron, as observed when the manganese(II)-EDTA complex was added to the same soil slurries. This confirms that the manganese(III) 1-6 complexes are thermodynamically more stable than the corresponding iron(III) complexes.","PeriodicalId":40817,"journal":{"name":"Acta Agriculturae Scandinavica Section B-Soil and Plant Science","volume":"144 1","pages":"39-43"},"PeriodicalIF":1.6,"publicationDate":"1999-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76230724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Properties and Classification of Soils of the Swedish Long-Term Fertility Experiments: IV. Sites at Ekebo and Fjärdingslöv 瑞典长期肥力试验土壤的性质和分类:IV. Ekebo和Fjärdingslöv站点
IF 1.6 4区 农林科学
Acta Agriculturae Scandinavica Section B-Soil and Plant Science Pub Date : 1999-03-01 DOI: 10.1080/09064719950135678
H. Kirchmann, J. Eriksson, S. Snäll
{"title":"Properties and Classification of Soils of the Swedish Long-Term Fertility Experiments: IV. Sites at Ekebo and Fjärdingslöv","authors":"H. Kirchmann, J. Eriksson, S. Snäll","doi":"10.1080/09064719950135678","DOIUrl":"https://doi.org/10.1080/09064719950135678","url":null,"abstract":"","PeriodicalId":40817,"journal":{"name":"Acta Agriculturae Scandinavica Section B-Soil and Plant Science","volume":"24 1","pages":"25-38"},"PeriodicalIF":1.6,"publicationDate":"1999-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88361548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 54
Monitoring Soil Quality of Arable Land: Microbiological Indicators 耕地土壤质量监测:微生物指标
IF 1.6 4区 农林科学
Acta Agriculturae Scandinavica Section B-Soil and Plant Science Pub Date : 1999-03-01 DOI: 10.1080/09064719950135669
B. Stenberg
{"title":"Monitoring Soil Quality of Arable Land: Microbiological Indicators","authors":"B. Stenberg","doi":"10.1080/09064719950135669","DOIUrl":"https://doi.org/10.1080/09064719950135669","url":null,"abstract":"The aim of this review is to present a foundation of present knowledge and to describe existing strategies for the development and implementation of monitoring systems for soil quality of arable land, based on soil-quality indicators. In the review viewpoints are discussed on the soil-quality concept, suggested frameworks for its assessment, and possible methods for the selection and evaluation of quality indicators. These sections are in general terms, without emphasis on chemical, physical or biological soil properties. The potential value of including microbiological indicators in a monitoring system is discussed thoroughly. Several possible microbiological indicators are suggested, and their advantages and disadvantages are discussed. Strategies for the selection and sampling of monitoring sites are reviewed, and the treatment of samples before analyses is also discussed. In conclusion, a framework for using microbiological indicators in a Swedish monitoring system is suggested.","PeriodicalId":40817,"journal":{"name":"Acta Agriculturae Scandinavica Section B-Soil and Plant Science","volume":"18 1","pages":"1-24"},"PeriodicalIF":1.6,"publicationDate":"1999-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78035301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 201
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