Báo cáo lâm nghiệp: "2 CO assimilation M Pinto in young Prosopis plants" doc

... for measurements. Two, which devel- oped leaves 20 cm from the apex on the main stem, were selected and C0 2 assimilation rates measured in a Parkinson chamber (Parkinson et ... & Dhal B.E. (1974) A physiological study of developing pods and leaves of honey mesquite. J. Range Manag. 27, 202-203 CO 2 assimilation in young Prosopis plan...

Ngày tải lên: 09/08/2014, 04:20

... performed with a compact and portable instrument. However, a major question which remains is leaf tempera- ture control. Leaf temperature control in the LI-6200 chamber relies ... a measurement lasting 20 min or more, are a matter of concern. As indicated in the figure legends, leaf temperature control in artificial environments is not a serious...

Ngày tải lên: 09/08/2014, 04:20

... fluorescence measurements (fluorometer PAM-2000, Walz, Germany). Initial fluorescence F0 was determined by applying a weak modu- lated measuring light (0.1 μmol m -2 s -1 , ... related pre-programmed sequence of the fluorometer was used, giving illumination times of 5 min with the internal LED actinic light source (up to 500 μmol m -...

Ngày tải lên: 08/08/2014, 18:21

... Japan Introduction Information about water flow resistance is essential to understanding and simulating water movement in trees (Yahata, 1987). There are a number of papers concerned with ... in small drilled holes in the stem and rootstock. Diurnal variation of the ambient temperature of the sensors was minimized to within less than 1°C by the...

Ngày tải lên: 09/08/2014, 04:20

... soil samples from both vigorous and degen- erating Hippophae vegetations, generally containing T. microphasmis, significantly improves the number of nodules formed per seedling, indicating ... (Brinkman et al.) which occurs in low numbers and the smaller plant parasite Tylenchorynchus micro- phasmis Loof, which occurs in much higher densities. Pot exp...

Ngày tải lên: 09/08/2014, 04:20

... CO 2 assimilation figures may thus be regarded as an estimate of the maximum assimilation rate of each leaf type. Measurements were taken weekly on completely expanded leaves at mid height in ... are included. Figure 3. Mean (±S.E.) maximum stomatal conductance (g) and CO 2 assimilation rate per unit area (Aarea) and per unit mass (Amass) in mature trees (dotted bars, n = 40) a...

Ngày tải lên: 08/08/2014, 01:21

... Hemerobius pini, Hemerobius humulinus, Dichrostigma flavipes, Phaeostigma notata, Panorpa communis and Panorpa germanica) is discussed. Keywords: Malaise traps; Neuroptera; Raphidioptera; Mecoptera; ... clearings, minimally 30 m inwards the forest. e forest clearings are covered mainly by rough reedgrass (Calamagrostis arundinacea) and shrubs like bird cherry (Padus racemosa) are growi...

Ngày tải lên: 07/08/2014, 03:22

... hypotheses for the conformity of selection averages for liquid and reinforced media (t-test from Excel computer program tools). Findings of the pH impact of nutrient media A medium of ½ RM-1964 was ... clone. Comparing cultures in sand and in agar A medium of ½ RM-1964 with a content of 0.4 mg BAP, pH 5.8, was manufactured. is medium was used in part as liquid with sand (25 cm 3 s...

Ngày tải lên: 07/08/2014, 03:22

... protected from harmful biotic and abiotic factors e.g. weed competition, game browsing, beetle infestation, etc. e overcoming of “planting shock” is an important factor where the root system role ... proportion of fine roots (thinner than 2 mm) in the root system is another important parameter of planting stock and thus the changes in the fine root volume in the first growing perio...

Ngày tải lên: 07/08/2014, 03:22

... poststratified mean for systematic and random sampling, the latter compared with the rooted mean variance estimate of the k replicated simple random samples and ~ σ – y according to (7) Random Systematic Sample ... well known as a means of increasing the precision of estimates in unstratified sampling by incorporating additional information about strata weights in the final estimator...

Ngày tải lên: 07/08/2014, 03:22