Báo cáo lâm nghiệp: "Nitrate utilization and communities nitrogen status in English woodland" ppt
Báo cáo lâm nghiệp: "Nitrate utilization and communities nitrogen status in English woodland" ppt
... ofasparagine. Both glutamate and alanineincreased as leaf NR activity increased.Rhodes et aL (1976) found that glutamate and alanine pools increased in Lemnaminor as nitrate ... assimilation of !5N-labelled nitrate in rice seedlings. Plant Cell Physiol. 16, 21-26Nitrate utilization and nitrogen status in English woodland communities E.C.M. CloughJ. PearsonG. ... occurring in most species in spring, when the budsof deciduous species are beginning tobreak. Amino acid analyses show that glu-tamate and alanine concentrations in- crease...
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Báo cáo lâm nghiệp:"Growth, damage and net nitrogen uptake in Picea abies (L.) Karst. seedlings, effects of site preparation and fertilisation" pptx
... in a high flow of soil water since the evapotran-spiration is low during the winter months [31, 38, 39]. The riskof nitrogen leaching was therefore high in CDSC during thewinter months, since ... results indicate an elevated riskfor increased nitrogen leaching in CDSC compared to C, FVC and PDSC. However, the elevated nitrogen concentration in the soil water was not repeated in CDSC during ... concentrations in soil water were higher in CDSCthan in FVC and C in the late autumn of 1999 and lower in thespring of 1999 (Fig. 3). N concentrations were higher forCDSC than for FVC and C in late...
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Báo cáo lâm nghiệp: "Stand biometry and leaf area distribution in an old olive grove at Andria, southern Italy" pptx
... area index (PAI, includingleaf and skeleton indexes) by conventional gap fraction analy-sis of hemispherical photography and reported values of 34 and 63% of that determined destructively in ... stand LAI was about 0.96 when expressed per totalorchard area. The same value of LAI was obtained when inte-grating “horizontally” individual trees or when integrating allcanopy layers in ... crowns and separatelyof measured branches were prepared by deleting some interferingparts of images (skeleton of branches) and adjusting contrast and brightness, if necessary (Figs. 2 and 3)....
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Báo cáo lâm nghiệp: " Zygotic embryogenesis and empty seed formation in European larch (Larix decidua Mill.)" pptx
... pre-zygotic incompat-ibility between ovules and self-pollinating pollen grains is notassumed and, most likely, the first fertilizing male gamete isderived from the first pollinating pollen grain, ... strobili to open pollination,self-pollination was tested: several branches containing both male and female generative structures were isolated together using waxed paperbags. Within the first three ... by non-linear correlation. Pollination efficiency was expressed by the meannumber of pollen grains per pollinated ovule, quantified at the end ofthe pollination period and published in our earlier...
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Báo cáo lâm nghiệp: "Precipitation partitioning and related nutrient fluxes in a subtropical forest in Okinawa, Japan" ppt
... Throughfall and stemflowchemistry in a northern hardwood forest, J. Ecol. 61 (1973) 495–508.[12] Edwards P.J., Studies of mineral cycling in a montane rain forest in New Guinea. Rates of cycling in ... Nakagawa Y., Rainfall and forest runoffchemistry: The 30-year change in the amount of dissolved elements in rainwater, input output budget of elements in rainfall and runoffwater, and the extensive ... during rainfall as wellas dry deposition onto the collector funnel [4]. Okinawa is asmall island without any large industrial plants and far from theAsian Continent. Particularly, in summer and...
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Báo cáo lâm nghiệp: "Radial-growth and wood anatomical changes in Abies alba infected by Melampsorella caryophyllacearum: a dendroecological assessment of fungal damage" ppt
... and polishedusing sand-paper of progressively finer grain. Then, they were cross-dated using characteristic tree-rings, mainly narrow (e.g., 1965, 1986) and light rings (e.g. 1963, 1972). In ... occurred in codominant and dominant trees (Tab. IV). No brooms were observed in subdo-minant trees. All brooms in codominant trees were observed onthe trunk, and 79% of the brooms in dominant ... 2. Intensive sampling scheme showing the location of the ninesample points along the two intersecting transects in a plot.Effects of fungal infection on fir growth 297than at 60 cm above and...
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Báo cáo lâm nghiệp: " Rubisco activity and mitochondrial malate oxidation in pedunculate oak (Quercus robur L) seedlings grown under present and elevated atmospheric CO concentrations 2" pps
... CO2concentration will induce higher photosyn-thetic rates in herbaceous C3 plants and also in trees (Ceulemans and Mousseau,1994). However, initial increases in photo-synthesis ... 1991) and in Pinus taedaL (Teskey, 1995). These direct effects,reviewed by Amthor (1991), have been sug-gested to involve changes in the intercellu-lar pH and/ or in membrane ... the seedlings used for photosynthesis and Rubisco measurements and of the seedlings usedfor mitochondria extraction. Total nitrogen wasmeasured using a carbon nitrogen autoanalyser(Carlo...
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Báo cáo lâm nghiệp: "Hybridization techniques and frost tolerance studies in intraspecific hybrids of Eucalyptus globulus Labil" pdf
... fluid.The cross-pollinated seed lot was clear-ly the best for the variables: seed produc-tion/capsule, rate of germination and seedling survival, and the self-pollinatedlot was ... This trend wasalso found in subsequent growth in thefield.Frost toleranceThese results suggest that hardeninghad no effect on frost resistance in thecrosses used (Table ... thecrosses used (Table II). Cold treatmentreduced the increase in height after 4 wk in all families by causing damage to theshoot apices....
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Báo cáo lâm nghiệp: "Complex study of foliage nutrient status in ash fertilized Scots pine stands in Lithuani" pptx
... to interpret the foliage and soil analyses, and to find possible indications in the soil-plant relation in Scots pine stands.MATERIAL AND METHODSWood ash and nitrogen experiment, containing ... production and nitrogen use in Scots pine stands in Eastern Finland. Forest Ecology and Management, 165: 317–326.INGERSLEV M., 1998. Vitalization of mature Norway spruce stands by fertilization and ... ash fertilization on stand growth, soil, water and nee-dle chemistry, and berry yields of lingonberry (Vaccinium vitis-idaea L.) in Scots pine stand in Finland. Metsandus-likud Uurimused (Forestry...
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Báo cáo lâm nghiệp: "Composition of psocid taxocenoses (Insecta: Psocoptera) in Fageti-Piceeta s. lat. and Piceeta s. lat. forests in the Western Carpathian Mts" pps
... by an individual collecting of adults. During sweeping and beating, 30 sweepings or beatings were carried out in each locality. Caught psocids were sucked into the exhauster and stored in a ... according to species ordinate in particular vectors and accord-ing to abundance of particular species (indicators) as well. ese indicators are automatically selected by the program in compliance ... species, occurring in the 7th AVZ, are missing in the lower and middle altitudinal veg-etation zones.Taxocenosis of the 8th (Piceeta s. lat.) altitudinal vegetation zoneEudominant species...
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