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The influence of nitrogen supply on the utilization of nitrogen reserves within lettuce (Lactuca sativa L. var. capitata), grown during Summer and Autumn greenhouse conditions
2005
Kacjan Marsic, N. (Lubiana Univ. (Slovenia). Inst. for Growing, Viticulture and Vegetable Growing) | Osvald, J. (Lubiana Univ. (Slovenia). Inst. for Growing, Viticulture and Vegetable Growing)
Two successive experiments were conducted, during Summer and Autumn 1999, with young lettuce plants (Lactuca sativa L. var. capitata) in a closed hydroponic system. In order to monitor the nitrogen dynamics within the plant, 15N was used as a tracer. The treatments were: 13.0, 0.5, 0.1 and 0.0 mM NO3N. Growth of lettuce plants decreased progressively as the level of N supply decreased and at the lower treatment the shoot growth was more affected than root growth. In the highest treatment (13.0 mM) there was little net movement of 15N into or out of the roots, but under more deficient conditions (0.5, 0.1 and 0.0 mM) 15N increasingly accumulated in the roots | [Sono stati effettuati due esperimenti successivi, nel corso dell´estate e dell´autunno del 1999, con piante giovani di lattuga (Lactuca sativa L. var. capitata) in un sistema idroponico chiuso. Allo scopo di controllare la dinamica dell´azoto nell´ambito della pianta, è stato utilizzato 15N come tracciante. I trattamenti sono stati: 13,0, 0,5, 0,1 e 0,0 mM di NO3N. La crescita delle piante di lattuga diminuiva progressivamente al calare del livello di disponibilità di N e al livello più basso di trattamento la crescita del germoglio era influenzata maggiormente rispetto al germoglio. Nel trattamento più alto (13,0 mM) si riscontrava un leggero movimento netto di 15N dentro e fuori dalle radici, ma in condizioni di maggiore carenza (0,5, 0,1 e 0,0 mM) l´15N si accumulava progressivamente nelle radici.]
显示更多 [+] 显示较少 [-][Development of genus fungi causing fusariosis of blue lupine (Lupinus angustifolius L.) in dependence on the temperature and nutrient media composition] 全文
2005
Ivanyuk, V.G.(Institute for Potato Growing, Samokhvalovichi (Belarus)) | Lisovets, S.V.(Institute of Arable Farming and Selection, Zhodino (Belarus))
Morphological and cultural peculiarities of Fusarium oxysporum and Fusarium avenaceum genus causing the fusariosis of blue lupine and role of temperature and nutrient media acidity in their development and accumulation of infection material have been studied. It has been stated that the most favorable conditions for Fusarium genus fungi cultivation are potato-glucose agar and temperature of 20-27 deg C and 5-7 pH of nutrient media
显示更多 [+] 显示较少 [-]Variability for Fe and Zn in selected germplasm growing on stressed lands 全文
2005
S. Farooq | F. Azam | R.M. Qureshi
Tree growing in agricultural landscapes: smallholder tree growing for sustainable rural development and environmental conservation and rehabilitation 全文
2005
s.h.g schuren
The state of forest resources in countries world-wi de has reached a critical point; never before have forest ecosystems been so greatly and r apidly affected by human activities as during last decades. Large stretches of the world�??s forests, that have served in the subsistence and development of humankind, have been converted to other uses particularly agriculture or are severely degraded. The net change in total forest between 1990 and 2000 approximates a loss of 9.4 million ha y-1 world-wide, leaving 3,682 million ha of natural forest and 187 million ha of forest plantations in the year 2000 (see table 1). Most of these losses (14.2 million hectar es y-1) occurred in tropical countries due to deforestation and land use conversion (FAO 2 001) and contributed to the unequal distribution of forest resources over the different continents (see figure 1) | S.H.G Schuren, 'Tree growing in agricultural landscapes: smallholder tree growing for sustainable rural development and environmental conservation and rehabilitation', In: Ploeg, J. van der and Masipiquena, A.B. (eds.). 2005. The future of the Sierra Madre: responding to social and ecological changes. Proceedings of the fifth international conference on environment and development. Isabela: CVPED, pp.3-10, 2005
显示更多 [+] 显示较少 [-]Optimal Quantity and Composition of Protein for Growing Children 全文
2005
Rodriguez, Nancy R.
Children have distinct nutritional needs relative to growth. Adequate intakes of energy and essential amino acids are necessary for optimal deposition of lean body mass and normal growth in young children. However, there are limited data concerning protein needs of children. Most recommendations for children represent an interpolation of data derived from infants and adults. Indeed, current protein requirements for young children, while scientifically based, are estimates at best. Historically, protein status in children was evaluated using classic nitrogen balance protocols. This work indicates that a wide range of protein intakes (0.6-2.9 g/kg) can be considered adequate for young, growing children. The ability of nitrogen balance studies to accurately reflect protein utilization has been examined and it appears that further investigations of protein utilization in children using stable isotope methodology, as well as traditional nitrogen balance protocols, are necessary to better evaluate protein needs of growing children. In addition, protein source may be an important factor in optimal diet design for growing children.
显示更多 [+] 显示较少 [-]Growing organic fruits and vegetables for local farmer's markets
2005
Glover, York
Normal and light weight oats as feed for growing pigs 全文
1980 | 2005
Salo, Maija-Liisa
v | ok | Kirjasto Aj-K | Kevyt ja normaalipainoinen kaura lihasikojen rehuna
显示更多 [+] 显示较少 [-]Manganese requirements for broilers in the growing and finishing phases
2005
Cupertino, E.S. | Gomes, P.C. | Albino, L.F.T. | Rostagno, H.S. | Cecon, P.R. | Schimidt, M.
Low input food and nutrition security: growing and eating more for less 全文
2005
S. Nordin
Tackling food insecurity in Malawi has moved away from emergency aid towards relief and recovery, with government policy looking at food diversification and nutrition. Produced following a nine-month study conducted in Malawi throughout 2005 involving twenty pilot projects, this manual presents a step by step and hands-on approach to achieve food security. <br /><br />The manual looks at the following areas: <br /><br /> low input implementing: meaning, examples of thinking, training and increasing skills, testing knowledge <br /> understanding the impact of food choices: cycle of dependency, cycle of better living, cycle of nature, testing understanding <br /> diet diversity: understanding nutrition and digestion, planning a better diet using food groups, access to food and awareness of local Malawian foods, teaching others about local foods, food use, preparation and preservation <br /> soil health: conserving soil, fertility and structure <br /> water management concepts: healing the soil for improved water management, selecting seeds and types of planting stations, water capture and irrigation, correct amounts of water and conservation <br /> plant, tree and animal health concepts: considerations for planning and design, mapping, individual guilds<br /> putting your design plan into action: planning, preparation, implementation, caring for plants, trees and animals, problems with pests and disease, animal management <br /> monitoring and evaluation <br />The manual also includes training materials such as handouts, posters, practical designs, sample workshop and training schedules, and further resources. Format: this manual is one large PDF file (20MB). It is also available as separate downloadable PDFs. See further information for the link. <br />
显示更多 [+] 显示较少 [-]The Nutritional Value of Khesari (Lathyrus sativus) for Growing and Laying Pullets 全文
2005
Sachchidananda D. Chowdhury | Zeenat Sultana | Musabbir Ahammed | Bishan L. Chowdhury | Shubash C. Das | Bimol C. Roy
The nutritional value of khesari (Lathyrus sativus), a grain legume, was determined for growing and laying pullets. Chemical analyses indicated khesari to be high in crude protein (283g/kg) and low in fat (12.0g/kg) with estimated true metabolizable energy concentration of 12.0MJ/kg. Four hundred Shaver 579 brown pullets belonging to same source were randomly assigned to 4 dietary treatments with 100 pullets each. Least-cost isocaloric and isonitrogenous diet containing raw khesari at 0, 100, 150 or 200g/kg were formulated and fed to grower and pullet developer birds separately during 12-18 weeks and 19-22 weeks respectively. This was followed by feeding layer diets during 23-34 weeks of age. The performance of grower chicks during 12-18 wks of age showed no significant effect on body weight gain and FCR but feed intake increased linearly (P<0.05) and differed significantly when the dietary level of raw khesari was 200g/kg. On the other hand, during 19-22 weeks, the birds showed increased body weight gain and feed intake and improved FCR (P<0.01) when they consumed the highest level of khesari (200g/kg). Layer performance in terms of egg production, egg mass and FCR were declined as the dietary levels of khesari was increased showing a clear-cut linear effect. It was concluded from the study that khesari supported growth performance in pullets either similar to or better than the control birds at the levels tested and that it is well tolerable for layers up to 150g/kg dietary level without experiencing any remarkable deleterious effects. Khesari did not show any symptoms typical to lathyrism in both grower and layer birds at the levels tested.
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