water stress and agriculture
Báo cáo lâm nghiệp: "Leaf number, water stress and carbon nutrition effects poplar leaf growth on" pps
Ngày tải lên :
09/08/2014, 04:20
... 3) stress Discussion Water stress and carbon nutrition signiarea of leaves It is well known that the water supply ficantly change the final reduces the expansive growth of leaf cells (Cleland, ... regular decrease of the mean leaf area was observed area Water stress effect Reduction of watering provoked water Leaf growth was inhibited until rewatering The final leaf size was very significantly ... elongation J Theor Biol 8, 264-276 McCree K.J & Davies S.D (1974) Effect of water stress and temperature on leaf size and on size and number of epidermal cells in grain sorghum Crop lici 14, 751-755...
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Báo cáo toán học: " Effect of water stress conditioning on the water relations, root growth capacity, and the nitrogen and non-structural carbohydrate concentration of Pinus halepensis Mil" pot
Ngày tải lên :
08/08/2014, 14:21
... corresponding to a water stress conditioning treatment All containers were randomly arranged in the available space Water stress was imposed through drought cycles which consisted in restricting watering ... Sandi S., Effect of restricted watering and with its combination with root pruning on root growth capacity, water status and food reserves of Pinus caribaea var hondurensis seedlings, Plant and ... species and stock-types resistant to drought seems to be a basic requirement Resistance to water stress in plants can be achieved by series of morphological and physiological features and responses...
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Báo cáo toán học: "quality and field performance of Douglas fir seedlings under varying degrees of water stress" potx
Ngày tải lên :
08/08/2014, 14:21
... parameters defined above (REL, RMC and and the field perfor1 year after mance, in terms of survival under two very different water regimes (wellplanting, watered and water- stressed) To provide the study ... effect of water stresses: desiccation during transportation or storage and drought after planting The tolerance to water stress depended on stock type and morphology: the use of sturdy and relatively ... four blocks for water- stressed and well-watered regimes, respectively Each block contained 120 seedlings, with ten randomised individuals per treatment Initial height (in cm) and stem diameter...
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Báo cáo toán học: "The effect of temperature and water stress on laboratory germination of Eucalyptus globulus Labill. seeds of different sizes" pot
Ngày tải lên :
08/08/2014, 14:22
... factors and their interactions in Eucalyptus occidentalis germination was described by Zohar and co-workers [28] Likewise, Battaglia [2] demonstrated that sub- and supra-optimal temperatures and water ... temperature, water potential and seed size in E globulus might be exploited to improve germination efficiency and seedling uniformity MATERIALS AND METHODS E globulus seeds of Flinders Island (Australia) ... capacities for sizes and occurred between 13 and 33 ºC; for seed sizes and the maximum occurred between 18º and 24 ºC While a significant interaction was found between temperature and seed size (table...
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Báo cáo lâm nghiệp: "Oak growth, development and carbon metabolism in response to water stress" pps
Ngày tải lên :
08/08/2014, 18:21
... and Abrams, 1993) Differences in stomatal response, resistance to water stress and increased water- use efficiency also are found when xeric and mesic oak species are compared and when xeric and ... to stress (Epron and Dreyer, 1993a) Nonstomatal photosynthetic mechanisms Photosynthetic rates of Q rubra rapidly decrease as water stress increases and often drop to zero under severe water stress ... functional systems at the same time Stomatal and nonstomatal effects of water stress vary with species, rate and degree of water stress imposed, and with many other factors However, carefully...
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Báo cáo lâm nghiệp: "The effects of elevated CO 2 and water stress on whole plant CO 2 exchange, carbon allocation and osmoregulation in oak seedlings" docx
Ngày tải lên :
08/08/2014, 18:21
... were 26 °C (maximum) and 11 °C (minimum); relative humidity was 70% From 25 August 1993, 15 seedlings were randomly assigned to well-watered or water- stressed treatments, and water supply was withheld ... (Conroy et al, 1988; Chaves and Pereira, 1992; Tschaplinski et al, 1993; Tyree and Alexander, 1993) Under drought conditions, osmotic adjustment on the one hand and growth and Quercus robur In the ... Pereira JS (1992) Water stress, climate change J Exp Bot 43, 1131-1139 CO and Coleman JS, Bazzaz FA (1992) Effects of CO and tem2 growth and resource use of co-occurring C and C annuals Ecology...
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Báo cáo lâm nghiệp: "Changes in carbon uptake and allocation patterns in Quercus robur seedlings in response to elevated an 2 CO and water stress: C 13 labelling" pps
Ngày tải lên :
08/08/2014, 18:21
... were randomly assigned in each tunnel, to well-watered or water- stressed treatments, and water supply was withheld in the latter treatment Plant transpiration was assessed gravimetrically and direct ... France) and stored at-1 °C in plastic bags over-winter In March 1994, the acorns were peeled, soaked in water and sown in 5-L cylindrical plastic containers filled with a shagnumpeat and sand mixture ... shaking and washed with deionized water Plant components were dried at 65 °C for 48 h and finely ground to pass a 40-mesh screen Powdered plant tissues were combusted at 1050 °C, and their C and...
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Báo cáo khoa học: "A comparison of photosynthetic responses to water stress in seedlings from 3 oak species: Quercus petraea (Matt) Liebl, Q rubra L and Q cerris L" doc
Ngày tải lên :
08/08/2014, 19:21
... strumarium and Helianthus annuus to chronic and acute water stress in sun and shade Plant Physiol 84, 476-482 Björkman O, Powles SB (1984) Inhibition of photosynthetic reactions under water stress: ... efficiency to increasing PFD and susceptibility to high light stress were studied on 3-4 leaf disks (10 cm ) punched from either well-watered or waterstressed plants (predawn leaf water potential -3.0 ... differentiated water stress tolerance are still poorly understood Efficiencies o f soil water extraction and of water transport pathways in the trees probably play a major role and differ significantly...
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Báo cáo khoa học: "Gas exchange and water relations of 3 sizes of containerized Picea mariana seedlings subjected to atmospheric and edaphic water stress under controlled conditions" pps
Ngày tải lên :
08/08/2014, 19:21
... conditions and levels of soil water availability Our objectives were ) to determine if on increased canopy size led to an increase in the susceptibility of the seedlings to water stress; and 2) to ... were folded and clamped closed at the bottom end A sandy loam was used to backfill between the root plugs and the membrane to ensure the continuity of water films between the root plug and the membrane ... concentrations of 0, 40, and 80 g PEG/kg H and were used to fill 45-I basins O The concentrations correspond to water potentials of about 0, -0.04 and -0.12 MPa (Williams and Shaykewich, 1969) Four...
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Báo cáo khoa học: "Distribution and variations of potassium and calcium in different cross sections of Picea abies Karst needles and Fagus sylvatica (L) leaves exposed to ozone and mild water stress" docx
Ngày tải lên :
08/08/2014, 19:21
... drought stressed chamber (DS) and an unstressed (well-watered) chamber (NS) Sampling The material for microanalysis was sampled on July and 21 August 1993 for beech leaves and July, 21 August and ... probably kept the water table at high levels The Ψ of wp the nonstressed trees remained between - 0.05 and -0.2 MPa isation and the EEC Chamber effects The pre-dawn leaf water potentials showed ... effect on calcium and potassium levels in both species Drought stress significantly affected phosphorus, manganese, calcium and potassium in both spruce clones and calcium and potassium in beech...
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Báo cáo khoa học: "Field comparison of transpiration, stomatal conductance and vulnerability to cavitation of Quercus petraea and Quercus robur under water stress" pptx
Ngày tải lên :
08/08/2014, 23:22
... related to water transport efficiency, and to possible involvement of cavitation and embolism in stress reactions Cochard et al (1992) showed that Q robur was more prone to water- stress- induced ... monitored and analysed MATERIAL AND METHODS Experimental plots Effects of water stress on Q petraea and Q robur were compared in groups of trees (4 of each species) in a 30-yr old, 16-m high mixed stand ... mixed stand Sensitivity of mature trees to drought was assessed using an imposed water shortage in a simplified lysimeter ysis of Seasonal time-course of water relations of both watered and droughted...
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Báo cáo lâm nghiệp: "Variations in seed and seedling responses to water stress in three provenances of Eucalyptus camaldulensis Dehnh" pptx
Ngày tải lên :
09/08/2014, 04:20
... to water stress Osmotic potentials of seedlings from all provenances were lowered similarly (by 0.1-0.3 MPa) by water and nutrient stress Water use efficiency as measured directly (g Dwt/kg water) ... Dwt/kg water) and by carbon discrimianalysis (Farquhar and Richards, 1984) was significantly largest in water- nation stressed, fertilised Tennant Creek seed- Both water and nutrient stress caused ... Fig 6) Leaf shape was affected most by nutrient stress in Tennant Creek and Petford seedlings, and by water stress in Katherine seedlings Discussion and Conclusions The results indicate that the...
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Báo cáo lâm nghiệp: " Effects of long-term water stress on net photosynthesis, growth and water-use efficiency of conifers in the field" doc
Ngày tải lên :
09/08/2014, 04:20
... 1, 2) The degree of reduction depended pri- upon intensity of water stress but also modified by water vapor saturation deficit (WSD) and the level of the turgor loss point (Figs 1, 2) In contrast ... conditions of limited water supply, indicating different kinetics for C0 and water vapor diffusion or sto2 matal conductance (cf Larcher, 1960) Under conditions of good water supply, Douglas ... Gross K (1988) Net photosynthesis, biomass production and water- use efficiency of young Norway spruces and Douglas firs, given different levels of water supply for several years in the field (in German)...
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Báo cáo y học: "Low socio-economic status, smoking, mental stress and obesity predict obstructive symptoms in women, but only smoking also predicts subsequent experience of poor health"
Ngày tải lên :
31/10/2012, 15:34
... physically examined and interviewed by physicians and research nurses Information concerning education and socio-economic group was obtained by questionnaire, which was sent out beforehand Data on smoking ... linear regression model including VC, FEV1 and PEF and individual heights The other “standard” confounding factors for lung function measurements, gender and age, were not controlled for as the ... 1.2-8.9 and OR 4.6, 95% CI 1.6-13.3) and in relation to smoking status A significant trend was obstructive symptoms in 2000-2001 (OR 3.7, 95% CI found between smoking status and lower lung 1.8-8.0 and...
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Measurement of Color, Gloss, and Translucency of White Salted Noodles- Effects of Water Addition and Vacuum Mixing.pdf
Ngày tải lên :
16/12/2012, 15:25
... Experiment Grain from ASWN and Australian Hard (AH) was milled commercially ASWN flour was 9.0% protein and 0.40% ash, and AH flour was 10.7% protein and 0.50% ash Water Addition Water addition with ... included conventional mixing (no vacuum) with water additions of 35 and 38% and vacuum mixing with 38% water addition and vacuum levels of –55 kPa and –90 kPa The experiment was repeated three ... calculate the gloss and translucency score Panelists ranked noodle gloss and translucency on boiled noodle disks and strands from six WSN mixes of ASWN and gelatin, following standard procedures...
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Application pillar dam and movable caisson dam technology in building barrier construction to prevent sea water rising and improving flood relief at estuary rivers.
Ngày tải lên :
01/04/2013, 22:46
... situation of the water resources which will be able to be limited by increasing demand of water using at upstream of Red and Cuu Long rivers On other hand, the climate on the earth is hotter and hotter, ... valve or slot, sluice body and slot at two heads, these made a box with open on face and water tight around faces, so that the sluice can be floated on the water surface and movable to construction ... loss when sea water level rising The salinity intrusion protection and fresh water storage works should be constructed to against heavy losses by phenomenon of slump earth and sea water level rising...
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Stress and Pronunciation
Ngày tải lên :
09/06/2013, 01:26
... không hợp lệ file bị xóa (violet.vn/uploads/resources/499/191652//STRESSANDPRONUNCIATION%20EX.doc) Quay trở http://violet.vn ...
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STRESS AND PRONUNCIATION + EX
Ngày tải lên :
02/07/2013, 01:25
... hook A circle B brick C fit D fish A table B lady C captain D labour A loudly B without C thousand D thought A size B grey C life D.eye A so B show C.who D though A name B flame C man D fame ... có cách phát âm /θ/ (three) /ð/ (then) Trong số từ tên người tên nơi chốn TH phát âm /t/ (Thailand, Thomas) - Các chữ SH, S đứng đầu từ (shoe, sugar); SH, SS, TI, C đứng từ (fashion, Russia,...
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Word Stress and pronunciation (2)
Ngày tải lên :
08/07/2013, 01:26
... a different stress pattern from the others 1.A sensitive B strangely C surgery D surprise A wonder B wealthy C vanish D variety A position B professor C population D possession A abandon B ancient ... listen D accept 13 A apple B England C shampoo D grammar 14 A open B provide C complete D prefer 15 A become B promise C suggest D disorder 16 A flower B exclude C husband D farmer 17 A doctor B simple ... A annual B average C mother D bacteria A benefit B biology C chemical D cricket A function B demand C complain D request A inhabit B invent C material D opera A parachute B period C particular...
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Study of Water Pollution and Bottom Mud Elution of Koya Pond
Ngày tải lên :
05/09/2013, 09:38
... pond A2 water course B1 water course B2 water course C water course D water course 160 10/16 11/3 11/21 140 120 natural pond A2 water course B1 water course B2 water course C water course D water ... pond A2 water course B1 water course B2 water course C water course D water course 16.0 9/28 10/16 11/3 11/21 10/16 11/3 11/21 natural pond A2 water course B1 water course B2 water course C water ... 7, No 4, 2009 COD（mg/L） water temperature（℃） 80.0 30.0 natural pond A2 water course B1 water course B2 water course C water course D water course 70.0 60.0 concentration water temperature 35.0...
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