Home Itens selecionados Provedores de dados OAI Créditos Sobre Ajuda

			Busca avançada
	Provedor de dados Organic Eprints (7) Autor Xie, Yue (7) Kristensen, Hanne Lakkenborg (4) Kristensen, Hanne L. (3) Canali, Stefano (2) von Fragstein, Peter (2) Bavec, F. (1) Bavec, Martina (1) Campanelli, Gabriele (1) Ortolani, Livia (1) Petersen, Karen Koefoed (1) Sørensen, Jørn Nygaard (1) Tittarelli, Fabio (1) Mais... Palavra-chave Crop combinations and interactions (4) Nutrient turnover (4) Vegetables (4) Crop combinations and interactions Recycling (3) Air and water emissions (2) Balancing and resource management Air and water emissions Vegetables (2) Balancing and resource management Air and water emissions (1) Composting and manuring (1) Environmental aspects (1) Soil quality (1) Soil tillage (1) Mais... Tipo do documento Journal paper (4) Conference paper, poster, etc. (3) Ano 2018 (1) 2017 (2) 2016 (1) 2014 (2) 2013 (1) País Germany (7) Idioma Inglês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 7 Primeira ... 1 ... Última Complementary root systems in organic intercropping of vegetables Organic Eprints Xie, Yue; Kristensen, Hanne L.. Complementary root systems in organic intercropping of vegetables. Tipo: Conference paper, poster, etc. Palavras-chave: Crop combinations and interactions Recycling; Balancing and resource management Air and water emissions Vegetables. Ano: 2014 URL: http://orgprints.org/28397/7/28397.pdf Stepwise incorporation of white clover (Trifolium repens L.)as fertiliser increases nitrogen fixation and improves nitrogen retention when intercropped with leek (Allium porrum L.) Organic Eprints Xie, Yue; Sørensen, Jørn Nygaard; Petersen, Karen Koefoed; Kristensen, Hanne Lakkenborg. Background and aims We investigated whether the incorporation of intercropped white clover as a split-dose fertiliser improves N retention of the plant-soil system in leek production. Methods White clover and leek were grown in pots where clover was stepwise incorporated into soil as fertiliser. Half of the clover was incorporated before leek transplantation (LT), the other half was incorporated 26 (S1) or 41 (S2) days after LT, compared with full incorporation of all clover (F) before LT. 15N injection and leaching studies were performed to investigate interspecific competition and the effects of precipitation on soil N availability. Results Stepwise incorporations increased or had no effect on leek growth, despite competition for N between white... Tipo: Journal paper Palavras-chave: Soil quality; Crop combinations and interactions; Composting and manuring; Nutrient turnover; Soil tillage; Vegetables. Ano: 2018 URL: http://orgprints.org/34289/1/Xie%20et%20al%20Plant%20and%20Soil%202018.pdf Complementary root systems in organic intercropping of vegetables Organic Eprints Xie, Yue; Kristensen, Hanne L.. The deep root system of the intercrop dyers woad complemented the shallow root system of leek without jeopardizing leek yields. These results show perspectives for reduction of nitrate leaching from leek production. Tipo: Conference paper, poster, etc. Palavras-chave: Crop combinations and interactions Recycling; Balancing and resource management Air and water emissions. Ano: 2013 URL: http://orgprints.org/28394/7/28394.pdf Intercropping leek (Allium porrum L.) with dyer’s woad (Isatis tinctoria L.) increases rooted zone and agro-ecosystem retention of nitrogen. Organic Eprints Xie, Yue; Kristensen, Hanne Lakkenborg. Nitrate leaching can be high in organic vegetable production. Late-harvested crops like leek limit the use of autumn catch crops. The aim of this study was to investigate the growing of a combination of a deep-rooted catch crop and a shallow-rooted vegetable to reduce the risk of nitrate leaching. We compared a leek sole crop (S) with two intercropped systems of leek and early-sown dyer’s woad (five weeks after leek planting) (IE) or late-sown dyer’s woad (eight weeks after leek planting) (IL) in two seasons: 2012 and 2013. To reveal root and resource competition, leek with dyer’s woad rows left empty (Semp), and early and late-sown dyer’s woad with leek rows left empty (DEemp, DLemp) were included. Yield, dry above-ground biomass, aboveground N... Tipo: Journal paper Palavras-chave: Crop combinations and interactions; Nutrient turnover; Air and water emissions; Vegetables. Ano: 2017 URL: http://orgprints.org/32017/1/Xie%20%26%20Kristensen_Intercropping-leek_2017_European-Journal%20of%20Agronomy.pdf Overwintering grass-clover as intercrop and moderately reduced nitrogen fertilization maintain yield and reduce the risk of nitrate leaching in an organic cauliflower (Brassica oleracea L. var. botrytis) agroecosystem Organic Eprints Xie, Yue; Kristensen, Hanne Lakkenborg. Cauliflower (Brassica oleracea L. var. botrytis) has high nitrogen (N) demand during growing, but due to its low N use efficiency and N-rich residues, it may cause N losses by leaching after harvest. A field experiment was conducted to investigate the effect of overwintering grass-clover as an intercrop and moderately reduced N fertilization on organic cauliflower yield and risk of nitrate leaching. The experiment tested sole-cropped (S) and intercropped (I) systems using a substitution design and two N fertilizer rates (180 and 230 kg N ha−1). To investigate the competition between cauliflower and grass-clover, cauliflower grown alone with empty grass-clover rows (Semp) and grass-clover grown alone with empty cauliflower rows (GCemp) were included. The... Tipo: Journal paper Palavras-chave: Crop combinations and interactions; Nutrient turnover; Air and water emissions; Vegetables. Ano: 2016 URL: http://orgprints.org/32019/1/Xie%20%26%20Kristensen%202016%20Scientia%20Hort.pdf Can new organic cropping systems produce vegetables with lower use of resources and losses of nitrate? Organic Eprints Kristensen, Hanne L.; Xie, Yue; Bavec, F.; von Fragstein, Peter; Campanelli, Gabriele; Ortolani, Livia; Canali, Stefano. To secure a sustainable production of plant foods for the future, there is a need to develop new cropping systems. These systems should have reduced needs of external resources and reduced environmental impact, while product yields are maintained at high level. Therefore, field trials were performed in Italy, Slovenia, Germany and Denmark with the aim to study new organic cropping systems for production of vegetable crops; and the systems’ effect on labor and energy consumption and the risk of losing nitrate to the water environment. The cropping systems included an in-season living mulch to exploit ecosystem services by attracting beneficial insects, suppressing weeds, and taking up excess nitrogen during production of two high-value crops of leek and... Tipo: Conference paper, poster, etc. Palavras-chave: Crop combinations and interactions Recycling; Balancing and resource management Air and water emissions Vegetables. Ano: 2014 URL: http://orgprints.org/28399/7/28399.pdf Can living mulches in intercropping systems reduce the potential nitrate leaching? Studies of organic cauliflower (Brassica oleracea L. var. botrytis) and leek (Allium porrum L.) production across European conditions Organic Eprints Xie, Yue; Tittarelli, Fabio; von Fragstein, Peter; Bavec, Martina; Canali, Stefano; Kristensen, Hanne Lakkenborg. The effect of introduction strategy for living mulches (LMs) to reduce the potential nitrate leaching was investigated when grown with vegetables with high nitrogen (N) demand and low use efficiency in four European countries: Italy, Slovenia, Germany and Denmark over 2 yr. The plant N uptake and soil nitrate N content at harvest, in the autumn, and in the following spring were measured below open-pollinated and hybrid cultivars of cauliflower and leek crops. The cultivars performed differently over the 2 yr. In Italy and Slovenia, when LM of burr medic or white clover was broad sown (addition design ADD) at the same time as crop transplanting, the N uptake of crops was hampered without increasing the total aboveground N accumulation. Delaying LM sowing by... Tipo: Journal paper Palavras-chave: Crop combinations and interactions; Nutrient turnover; Vegetables; Environmental aspects. Ano: 2017 URL: http://orgprints.org/32018/1/Xie%20et%20al%20RAFS%202017.pdf Registros recuperados: 7 Primeira ... 1 ... Última

Empresa Brasileira de Pesquisa Agropecuária - Embrapa Todos os direitos reservados, conforme Lei n° 9.610 Política de Privacidade Área restrita		Embrapa Parque Estação Biológica - PqEB s/n° Brasília, DF - Brasil - CEP 70770-901 Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco