Báo cáo lâm nghiệp: "Effect of water stress on potassium distribution in young seedlings of maritime pine (Pinus pinaster" doc

... Effect of water stress on potassium distribution in young seedlings of maritime pine (Pinus pinaster Ait.) A. Nguyen 1 A. Lamant 2 1 INRA, Laboratoire dAm6lioration des Arbres ... effect Discussion and Conclusion The examination of variations in the K+ content under water stress showed that the potassium amount per root remained const...

Ngày tải lên: 09/08/2014, 04:20

... 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 Experimental conditions Long-term stress ... stress was obtained by lowering the daily watering to 10% of the amount of tran- spired water at the beginning of the experiment. After 20 d, full waterin...

Ngày tải lên: 09/08/2014, 04:20

... plant –1 Figure 2. Responses of seedling shoot dry mass, nutrient content and concentration in relation to increasing N supply for one growing season (18 wk) in the greenhouse. The vertical scale insert represents nutrient ... nutrition of containerized Pinus resinosa seedlings at varying moisture regimes, New For. 3 (1989) 171–180. [48] Timmer V.R., Folk R.S., Evaluating peat as a...

Ngày tải lên: 08/08/2014, 00:22

... well in either solution. However, Q phellos and Q nigra seedlings in hypoxic solution attained only 30% of the relative height growth of seedlings in normoxic solu- tion (table ... conductance. On 12 of the 15 sample days, seedlings grow- ing in hypoxic nutrient solution maintained lower transpiration rates than control seedlings. Simil...

Ngày tải lên: 08/08/2014, 18:21

... transformation of secondary stand with domination of aspens into the stand with dominant spruce and significant admixture of alder in wet part of the experimental plot. 3.5. Comparison of seasonal increment ... underestimation of real growth by dendrome- ters. The cross-dating showed, that relating the annual ring widths of these aspen trees in 2000 to 1999 and taking the co...

Ngày tải lên: 08/08/2014, 00:22

... evidenced by the decline in relative water content (RWC) and in the leaf water potential. More than 80% of the PR seedlings and only 20% of BR seedlings transplanted in well- watered regimen survived. ... after planting on a reforesta- tion site, seedlings are exposed to a number of stresses. The main stressful factor is commonly water stress because root confineme...

Ngày tải lên: 08/08/2014, 01:22

... direction of prevailing winds, in contradiction to plot 3 where the skidding track follows the direction of prevailing winds. J et al. (2001) supposed that losses of production functions of ... 323–329 confirmed under conditions of this investigated locality. CONCLUSION Based on the analysis of a part of results from the international IUFRO trial CZ 14 Machov inv...

Ngày tải lên: 07/08/2014, 03:22

... germination or even result in a complete loss of germination in less vigorous seedlots. Faster dor- mancy release should result in reducing the chilling period, improve germination and increase ... absorb water from the germination substrate (Table 4; Fig. 2). We found no apparent effect of different concen- trations of ethephon or GA 3 on germination ca- pacity. e only ex...

Ngày tải lên: 07/08/2014, 10:21

... supplies of winter and/ or of spring moisture are insufficient to cover the high consumption of water during summer months. We also confirmed a more significant but negative effect of monthly temperatures ... 301 transpiration, is high during the vegetation pe- riod. Even very high supplies of water in the soil from winter and/or spring precipitation are insuf- ficient to cover...

Ngày tải lên: 07/08/2014, 10:21

... mountain populations. Because the seedlings originating from pollination with pol- len of high-elevation trees are generally smaller, the discarding of small seedlings in the course of sorting in ... Biotopes in Changing Environmental Conditions. Effect of initial height of seedlings on the growth of planting material of Norway spruce (Picea abies [L.] Karst.) i...

Ngày tải lên: 07/08/2014, 10:21