Báo cáo lâm nghiệp: "Production and humus form development in forest stands established on agricultural lands – Kostelec nad Černými lesy region" potx

... the Ministry of Agriculture of the Czech Republic, Research Project No. QG 50105. Production and humus form development in forest stands established on agricultural lands – Kostelec nad Černými ... composition). e study was performed in the stands of four tree species on afforested agricul- tural lands, in a neighbouring forest stand on con- tinuo...

Ngày tải lên: 07/08/2014, 03:22

... cultures at 25°C in Pachlewski’s medium containing nitrogen as either diammonium tartrate or proteins: bovine serum albumin (BSA), gelatin, casein or pro- teins extracted from ... to fresh medium containing casein, gelatin or BSA as the sole nitrogen source. Gelatin proved to be the most efficient inducer (Fig. 1a). Elimination of carbon, inorganic...

Ngày tải lên: 09/08/2014, 04:20

... (years )and category: R – reclamation S – succession Number of species forest species forest margin and brushwood species non -forest species Fig. 2. Number of forest and non- forest species in communities ... carbon and energy trapped in biomass and soil was twice higher in a forest ecosystem restored on post-mining areas of a sand opencast mine during...

Ngày tải lên: 07/08/2014, 10:22

... acclimation on the susceptibility of photosynthesis to photoinhi- bition in Scots pine and in winter and spring cereals: a fluorescence analysis. Funct Ecol 5, 91-100 Osmond CB, ... and patterns of photoinhibition in two neotropical palms in clear- ings and forest understory during the dry season. Am J Bot 81, 726-738 Björkman O, Powles SB...

Ngày tải lên: 08/08/2014, 18:21

... thick in the healthy stand, but only ca 30 cm thick in the declining stand. In Sprakensehl, small clay layers were scattered in the sandy subsoil of both stands. In the ... reduced in the stands of the Hakel Forest. In these stands, the tensiometers were placed within an area of about 20 m * 10 m. Since the subsoil of the declinin...

Ngày tải lên: 08/08/2014, 18:21

... namely 1 n L 1 N –n L – ( 1 – – ) Σ W h S 2 h + – ( – – – ) Σ (1 –W h )S 2 h n N h=1 n 2 N – 1 h=1 and he uses s 2 – y st.post.cond as the according variance es- timator, ... i=1 Finally, the variance of the sample mean – y in simple random sampling is denoted by 1 n 1 N σ 2 – y = ( 1 – ) Σ (y i –...

Ngày tải lên: 07/08/2014, 03:22

... phytohormone treatments on mature or immature zygotic embryos. Induc- tion and continuous proliferation require auxin and cytokinins (CKs), whereas the further development and maturation of embryos ... 6-benzylaminopurine – BAP; cytokinins – CKs; 2,4 dichlorophenoxyacetic acid – 2,4-D; indolylbutyric acid – IBA; putrescine – Put; spermidine – Spm; spermine...

Ngày tải lên: 07/08/2014, 10:21

... application – i.e. economics at national, sectoral and corporate levels. In the conditions of forestry the wood-producing function [e division of forest functions into wood- producing and non-wood-producing ... –1 –2 0 –2 1 –2 0 Small-scale forest production 15 –2 26 19 17 18 1 Other forest operations 27 99 88 8 –6 –7 6 Total forest operations 795 881...

Ngày tải lên: 07/08/2014, 03:22

... and ecological stability of mixed forest stands in uplands – VI. A beech/larch stand on a mesotrophic site of the Křtiny Training Forest Enterprise V. H, P. K Faculty of Forestry and ... Křtiny Training Forest Enterprise. Journal of Forest Science, 49: 50 2–5 14. KANTOR P., KNOTT R., MARTINÍK A., 2001. Production potential and ecological stability of mixed...

Ngày tải lên: 07/08/2014, 03:22

... within the pulpwood logs. Heart- wood has a negative in uence on the pulping quality increas- ing chemical consumption in pulping and bleaching, decreas- ing pulp yield and pulp brightness, and increasing ... by Wilkins [28] in E. grandis, although some other studies in Pinus radiata [4] and E. grandis [3] have found linear relationship of these two variables. In conclusion...

Ngày tải lên: 07/08/2014, 16:21