Báo cáo lâm nghiệp:"Competition for water between beech seedlings and surrounding vegetation in different light and vegetation composition conditions" ppsx

... Sciences, 2004 DOI: 10.1051/forest:2003051 Original article Competition for water between beech seedlings and surrounding vegetation in different light and vegetation composition conditions Lluis ... were taken in all the treatments except for M + V, where beech seedlings soon presented signs of withering and leaf-shedding. Five different beech seed...

Ngày tải lên: 08/08/2014, 01:21

... significance for genetic improve- ment in forest trees and other woody spe- cies where traditional breeding procedures and genetic manipulation are more difficult owing to: 1) ... at generating haploid lines of Poplar species for genetic manipulation and breeding programs K.E. Wolter B.H. McCown Department of Horticulture, University of Wiscons...

Ngày tải lên: 09/08/2014, 04:20

... P.D. (1967) Seed sterility and distur- bances in embryogeny in conifers with particu- lar reference to seed testing and breeding in Pinaceae. Stud. For. Suec. 45, 1-97 Durzan ... discontinuities that emerge. These forces create a sheath or boundary layer for the stream tube. Stream lines may appear irregular and fractal, reflecting the const...

Ngày tải lên: 09/08/2014, 04:20

... recorded in the well developed vegetation site (H) in May and September 1998 and in degraded sites in September 1998. Original article Diagnosing plant water status as a tool for quantifying water ... also in the case of Q. coccifera grow- ing in different areas of Turkey. In fact, when growing in degraded sites, this species reduced g L , thus maintaining high R...

Ngày tải lên: 09/08/2014, 04:20

... results obtained with container material. We also think that this is probably true for all spe- cies including forest trees, and this sug- gests important indirect effects ... relationship. An initial profile analysis in acid predis- posing soils suggested several factors inducing an inability to provide an ade- quate water supply that might re...

Ngày tải lên: 09/08/2014, 04:20

... Picon-Cochard C., Prévosto B., Competition for water between beech seedlings and surrounding vegetation in different light and vegetation composition conditions, Ann. For. Sci. 60 (2003) 593–600. [8] Collet ... and for each species harvesting began when the number of seedlings present had stabilised. If necessary the number of tree seedlings in each row...

Ngày tải lên: 08/08/2014, 01:21

... the intact tissues also provided more hardening-related informa- tion: in the near infrared range, they revealed the decreasing rel- ative water content with advancing cold hardening, and, in ... to the timing and the inherent rate of hardening was extensive, with the onset beginning between 240 and 285 days from the beginning of the year, and LT50 values after 10 weeks ranging...

Ngày tải lên: 08/08/2014, 01:21

... 4YQ, U.K., and 2 Department of Forestry, Instituto Superior de Agronomia, P-1399 Lisboa Codex, Portugal Introduction Eucalyptus globulus is becoming increas- ingly important in Mediterranean ... production in young E. globulus growing in the field in Portugal can be increased by a factor of 3 under irrigation, and this has been related to an...

Ngày tải lên: 09/08/2014, 04:20

... 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 Forestiers, ... examination of variations in the K+ content under water stress showed that the potassium amount per root remained constant for French seedlings, while it increase...

Ngày tải lên: 09/08/2014, 04:20

... 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 watering was applied. ... mean leaf area was observed. Water stress effect Reduction of watering provoked water stress. Leaf growth was inhibited until rewatering. The final leaf size was very sig...

Ngày tải lên: 09/08/2014, 04:20