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Journal of Sustainable Agriculture最新文献

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Effects of Changes in Flax (Linum usitatissimum L.) Density and Interseeding with Red Clover (Trifolium pratense L.) on the Competitive Ability of Flax Against Brassica Weeds 亚麻(Linum usitatissimum L.)变化的影响密度与红三叶草间种对亚麻与芸苔属杂草竞争能力的影响
Journal of Sustainable Agriculture Pub Date : 2011-10-01 DOI: 10.1080/10440046.2011.611745
Griselda E. Sánchez Vallduví, S. Sarandón
{"title":"Effects of Changes in Flax (Linum usitatissimum L.) Density and Interseeding with Red Clover (Trifolium pratense L.) on the Competitive Ability of Flax Against Brassica Weeds","authors":"Griselda E. Sánchez Vallduví, S. Sarandón","doi":"10.1080/10440046.2011.611745","DOIUrl":"https://doi.org/10.1080/10440046.2011.611745","url":null,"abstract":"A field experiment was carried out to evaluate the competitive ability of flax against Brassica weeds. Two densities of flax, either with or without red clover, and either with or without Brassica were sown. The presence of Brassica decreased seed yield for flax by 15–30%. The flax sown at the high density and interseeded with red clover improved the crop's competitive ability from the early growth stages. The early competition between flax and the weed was reflected in a smaller (about 30–50%) production of seeds and shoots in Brassica plants at the end of their cycle, which suggests a lower capture of resources when weeds did not grow alone. In one year, both high density and interseeding with red clover resulted in an increased capture of N by the crop and a reduced accumulation of N in seeds of Brassica. These findings indicate that the crop suppressed the growth of weeds, affecting future weed abundance.","PeriodicalId":50032,"journal":{"name":"Journal of Sustainable Agriculture","volume":"35 1","pages":"914 - 926"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/10440046.2011.611745","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59668990","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
Effects of Organic Management on Predator Densities of Myzus persicae (Sulzer) During Transition to Organic Agriculture in Peach Fields in China 有机管理对桃田有机农业转型中桃蚜捕食者密度的影响
Journal of Sustainable Agriculture Pub Date : 2011-10-01 DOI: 10.1080/10440046.2011.588997
D. Zhang, Min Dong, Xiangge Du
{"title":"Effects of Organic Management on Predator Densities of Myzus persicae (Sulzer) During Transition to Organic Agriculture in Peach Fields in China","authors":"D. Zhang, Min Dong, Xiangge Du","doi":"10.1080/10440046.2011.588997","DOIUrl":"https://doi.org/10.1080/10440046.2011.588997","url":null,"abstract":"We studied the effects of organic management (OM) on densities of six predator species of green peach aphid (GPA), three coccinellid predators (Propylea japonica, Harmonia axyridis, Coccinella septempunctata), and three non-coccinellid predators (Chrysoperla sinica, Epistrophc baltcata, and Misumenops tricuspidatus) in five OM peach fields, compared and paired with five conventional management (CM) fields from the first year of OM in 2004–2009. Coccinellid and non-coccinellid predator densities were significantly higher on several sampling dates in OM fields than in CM fields. Coccinellid predator density was significantly lower in the first two years of OM than in the last three years in the OM fields. The density of non-coccinellid predators in the fourth year of OM was much greater than during the first year of OM, and there was a significant increase by the sixth year of OM compared to the first two years of OM. The leaf density index of GPA was significantly lower in the fifth and sixth year of OM than the first three years of OM in the OM peach fields. Our study suggests organic management can resume and increase predator densities of green peach aphid during transition to organic agriculture in peach fields.","PeriodicalId":50032,"journal":{"name":"Journal of Sustainable Agriculture","volume":"35 1","pages":"826 - 839"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/10440046.2011.588997","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59668968","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: 11
Effects of Plant Stress and Habitat Manipulation on Aphid Control in Greenhouse Sweet Peppers 植物胁迫和生境调控对温室甜椒蚜虫防治的影响
Journal of Sustainable Agriculture Pub Date : 2011-09-01 DOI: 10.1080/10440046.2011.606489
L. A. Polack, P. C. Pereyra, S. Sarandón
{"title":"Effects of Plant Stress and Habitat Manipulation on Aphid Control in Greenhouse Sweet Peppers","authors":"L. A. Polack, P. C. Pereyra, S. Sarandón","doi":"10.1080/10440046.2011.606489","DOIUrl":"https://doi.org/10.1080/10440046.2011.606489","url":null,"abstract":"Interactions between sweet pepper, aphids, and natural enemies under greenhouses can be modified by management practices. An excess of salinity in the irrigation of sweet pepper, the effect of flowering plants on aphid density, and natural enemy diversity were evaluated. Aphids were more abundant on plants irrigated with high conductivity solutions and on sweet peppers without associated flowering plants. Parasitoids and predators were more diverse and abundant in presence of flowering plants. Greenhouse horticultural management practices that avoid stress conditions by means of appropriate irrigation, and increase local biodiversity with flowering plants, could improve aphid control by enhancing abundance and diversity of natural enemies.","PeriodicalId":50032,"journal":{"name":"Journal of Sustainable Agriculture","volume":"35 1","pages":"699 - 725"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/10440046.2011.606489","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59669170","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: 14
Conservation Agriculture and Livelihoods of Smallholder Farmers in Central Mozambique 莫桑比克中部的保护性农业和小农生计
Journal of Sustainable Agriculture Pub Date : 2011-09-01 DOI: 10.1080/10440046.2011.606492
P. Nkala, N. Mango, P. Zikhali
{"title":"Conservation Agriculture and Livelihoods of Smallholder Farmers in Central Mozambique","authors":"P. Nkala, N. Mango, P. Zikhali","doi":"10.1080/10440046.2011.606492","DOIUrl":"https://doi.org/10.1080/10440046.2011.606492","url":null,"abstract":"This article demonstrates how conservation agriculture impacts smallholder farmers' livelihoods in Mozambique through increased crop productivity and yields, using primary data on smallholder farmers practicing conservation agriculture and others not using this technology from Nhanguo, Pumbuto, and Ruaca in Manica and Sofala provinces. Data analysis employs semiparametric propensity score matching methods. Direct correlations between conservation agriculture, higher productivity and yields; and indirect correlations with changes in household incomes and food security are suggested. Conclusively, systematic targeting of conservation agriculture to different farmer categories, can improve livelihoods, household incomes and food security. We recommend integration of conservation agriculture into the rural development policy framework in Mozambique.","PeriodicalId":50032,"journal":{"name":"Journal of Sustainable Agriculture","volume":"35 1","pages":"757 - 779"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/10440046.2011.606492","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59668782","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: 62
Teacher Beliefs and the Extent to Which Sustainable Agriculture Is Taught in High School 教师信念与高中可持续农业教学的程度
Journal of Sustainable Agriculture Pub Date : 2011-09-01 DOI: 10.1080/10440046.2011.606494
M. Muma, Robert A. Martin, M. Shelley
{"title":"Teacher Beliefs and the Extent to Which Sustainable Agriculture Is Taught in High School","authors":"M. Muma, Robert A. Martin, M. Shelley","doi":"10.1080/10440046.2011.606494","DOIUrl":"https://doi.org/10.1080/10440046.2011.606494","url":null,"abstract":"The purpose of this study was to determine the association between agriculture teachers' beliefs about sustainable agriculture and the extent to which teachers taught topics in sustainable agriculture. A random sample of 844 teachers in the north central region of the United States was sent questionnaires. Teachers' beliefs regarding sustainable agriculture explained no variance in the extent to which teachers taught selected sustainable agriculture topics. However, teachers' perceptions of selected agriculture practices uniquely explained only 1% of variance. Future research on beliefs regarding sustainable agriculture may rely more on understanding teachers' perceptions of sustainable agriculture practices than teachers' sustainable agriculture beliefs.","PeriodicalId":50032,"journal":{"name":"Journal of Sustainable Agriculture","volume":"35 1","pages":"804 - 822"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/10440046.2011.606494","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59668853","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: 4
Oat and Oat-Vetch as Rainfed Fodder-Cover Crops in Semiarid Environments: Effects of Fertilization and Harvest Time on Forage Yield and Quality 半干旱条件下雨养牧草覆盖作物燕麦和燕麦-豌豆:施肥和收获时间对牧草产量和品质的影响
Journal of Sustainable Agriculture Pub Date : 2011-09-01 DOI: 10.1080/10440046.2011.606490
M. E. Ramos, M. Altieri, P. García, A. B. Robles
{"title":"Oat and Oat-Vetch as Rainfed Fodder-Cover Crops in Semiarid Environments: Effects of Fertilization and Harvest Time on Forage Yield and Quality","authors":"M. E. Ramos, M. Altieri, P. García, A. B. Robles","doi":"10.1080/10440046.2011.606490","DOIUrl":"https://doi.org/10.1080/10440046.2011.606490","url":null,"abstract":"We evaluate the forage yield and quality, species composition, and carrying capacity of oats and oat-vetch as fodder-cover crops, grown in almond orchards, under mineral or organic fertilizer and three harvesting regimes (“grazing,” “hay,” and “grain plus straw”). Also, we show preliminary results of almond yield. Differences in yield due to mineral and organic fertilization were only 9%. The carrying capacity was similar for all treatments. The almond yield was greater when the cover crop was removed early as “grazing.” Therefore, oats and oat-vetch could be used as cover crops in almond orchards if removed early by livestock grazing.","PeriodicalId":50032,"journal":{"name":"Journal of Sustainable Agriculture","volume":"78 1","pages":"726 - 744"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/10440046.2011.606490","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59669206","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: 13
Fertilization Economy in Organic Lettuce Production 有机生菜生产中的施肥经济
Journal of Sustainable Agriculture Pub Date : 2011-09-01 DOI: 10.1080/10440046.2011.606491
R. Čabilovski, M. Manojlović, D. Bogdanović, V. Rodić, M. Bavec
{"title":"Fertilization Economy in Organic Lettuce Production","authors":"R. Čabilovski, M. Manojlović, D. Bogdanović, V. Rodić, M. Bavec","doi":"10.1080/10440046.2011.606491","DOIUrl":"https://doi.org/10.1080/10440046.2011.606491","url":null,"abstract":"In a field experiment on a farm registered for organic production, we studied the economic profitability of the application of different organic materials (farmyard manure, FYM; guano, G; soybean meal, S, and forage pea meal, P) in lettuce production. The highest fertility costs per unit of N were found with the P treatment (6.22 € kg N−1), and the lowest with the FYM treatment (0.8 € kg N−1). Due to the application of organic materials, the highest additional profit was made with the FYM treatment (1289 € ha−1), and the lowest with the P treatment (729 € ha−1). If the farm does not have manure at its disposal, with current market prices, the economically most sound application is soybean meal and forage pea meal.","PeriodicalId":50032,"journal":{"name":"Journal of Sustainable Agriculture","volume":"35 1","pages":"745 - 756"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/10440046.2011.606491","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59669215","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: 9
Areas and Greenhouse Gas Emissions from Feed Crops Not Used in Canadian Livestock Production in 2001 2001年加拿大家畜生产中未使用的饲料作物的面积和温室气体排放
Journal of Sustainable Agriculture Pub Date : 2011-09-01 DOI: 10.1080/10440046.2011.606493
J. Dyer, X. Vergé, S. Kulshreshtha, R. Desjardins, B. McConkey
{"title":"Areas and Greenhouse Gas Emissions from Feed Crops Not Used in Canadian Livestock Production in 2001","authors":"J. Dyer, X. Vergé, S. Kulshreshtha, R. Desjardins, B. McConkey","doi":"10.1080/10440046.2011.606493","DOIUrl":"https://doi.org/10.1080/10440046.2011.606493","url":null,"abstract":"Estimates of greenhouse gas (GHG) emissions from Canada's four main livestock industries were integrated with the Canadian Economic and Emissions Model for Agriculture (CEEMA) which operates at the census district level. The livestock crop complex (LCC), which defines the crop area required to feed Canada's livestock, was disaggregated from provincial to district level. The LCC areas were subtracted from the crop areas stored in the CEEMA database to define the maximum area available for non-meat food, fiber, and biofuel feedstock production. The resulting non-livestock residual (NLR) area estimates were 18.7 Mha in the west (excluding rangeland, summerfallow, irrigated cropland and any crops not associated with livestock diets) and 1.0 Mha in the east. The GHG emissions from the NLR in the west were 13.7 Tg CO2e, or 30% of the total GHG emissions from those crops associated with livestock diets. The 1.6 Tg CO2e of GHG from the NLR in Eastern Canada represented 8% of the total GHG emissions from those livestock-related crops. The eastern NLR crop areas were more sensitive to changes in livestock populations than the Western Canada NLR areas because of the more dominant role of livestock production in eastern Canadian agriculture than in the west. The total agricultural GHG emissions budget showed direct but muted sensitivity to changes in Canadian livestock populations in both eastern and Western Canada. The methodology will link agricultural GHG emissions with district level land use decisions.","PeriodicalId":50032,"journal":{"name":"Journal of Sustainable Agriculture","volume":"35 1","pages":"780 - 803"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/10440046.2011.606493","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59668795","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: 13
Agroecology and the Growing Food Crisis 农业生态学与日益严重的粮食危机
Journal of Sustainable Agriculture Pub Date : 2011-09-01 DOI: 10.1080/10440046.2011.606488
S. Gliessman
{"title":"Agroecology and the Growing Food Crisis","authors":"S. Gliessman","doi":"10.1080/10440046.2011.606488","DOIUrl":"https://doi.org/10.1080/10440046.2011.606488","url":null,"abstract":"","PeriodicalId":50032,"journal":{"name":"Journal of Sustainable Agriculture","volume":"35 1","pages":"697 - 698"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/10440046.2011.606488","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59669138","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
Depth of Sowing for “Laramie” Medic (Medicago rigidula) Seedlings Emergence " Laramie " Medicago rigidula幼苗出苗的播种深度
Journal of Sustainable Agriculture Pub Date : 2011-07-01 DOI: 10.1080/10440046.2011.586581
G. Mbugwa, James M. Krall, David E. Legg
{"title":"Depth of Sowing for “Laramie” Medic (Medicago rigidula) Seedlings Emergence","authors":"G. Mbugwa, James M. Krall, David E. Legg","doi":"10.1080/10440046.2011.586581","DOIUrl":"https://doi.org/10.1080/10440046.2011.586581","url":null,"abstract":"Sound sowing practices for “Laramie” medic (Medicago rigidula [L.] Allioni) are needed in the U.S. Central High Plains to ensure its successful establishment. The objective of this study was to investigate the optimum depth of seed sowing for Laramie medic seedlings emergence in comparison with alfalfa (M. sativa L.) and winter wheat (Triticum aestivum L.) seedlings emergence. Results showed alfalfa and medic had significantly greater percent emergence from the top 0 to 20 and 10 to 30 mm sowing depths, respectively, while winter wheat had significantly greater emergence from the top 10 to 60 mm sowing depths. This study found the optimum sowing depth for Laramie medic seedling emergence to be in the range of 10 to 30 mm with varying peaks within the range depending on moisture availability.","PeriodicalId":50032,"journal":{"name":"Journal of Sustainable Agriculture","volume":"35 1","pages":"624 - 638"},"PeriodicalIF":0.0,"publicationDate":"2011-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/10440046.2011.586581","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59668832","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
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