Báo cáo lâm nghiệp: "Pollen-limited seed set in ( Tamarindus indica L )" ppsx

... effect of pollen quality: flowers (n = 50) were either self-pollinated, artificially crossed with pollen from different trees or allowed to pollinate naturally. The seed set percentage ... resource limitation, 2) post-fertilization abortion of seeds, and 3) pollen grain limitation. Materials and Methods Tamarindus indica L. (Caesalpinae) is a trop...

Ngày tải lên: 09/08/2014, 04:20

... (SAS ® Institute Inc. 1999). Spatial model Second set of models allowed the modelling of spatial patterns in residual variation. e goal was to reveal possible local and global trends using autoregressive ... for analyzing field variety trials as it allows for the fitting of spatial variability within field trials in a variety of ways (C et al. 2000). Sample variograms were cr...

Ngày tải lên: 07/08/2014, 03:22

... výsadbou – selektivní těžba smrku se současnou výsadbou cílových dřevin: buku lesního (Fagus sylvatica L. ) a jedle bělokoré (Abies alba Mill.) s dodá- ním jasanu ztepilého (Fraxinus excelsior L. ). Biomasa ... W et al. (1 982). FORKOME model provides a possibility of de- fining felling scenarios. e interface supports de- termining the time of felling and diameters of tree spec...

Ngày tải lên: 07/08/2014, 03:22

... situation in the codominant (main) layer while trees belonging to class 3 have slimmer stems. However, data indicate that a silvicultural intervention also in the main layer is needed in the ... statistically highly significant. e differences are clearly visible in Fig. 3, where also linear trends are given. Trees with nearly the same dbh – but belonging to dominant/codominant t...

Ngày tải lên: 07/08/2014, 03:22

... poles and large trees between the two forests (P > 0.05). Family Species Shade tolerant a Seedlings Saplings Poles Large trees Overall trees PF LF PF LF PF LF PF LF PF LF Salicaceae Salix matsudana ... rapid increase in recruitment into the seedling and sapling layers. e fact that the density of seedlings and saplings of the logged forest increased, confirmed that tree regeneratio...

Ngày tải lên: 07/08/2014, 03:22

... consisting of oak (2 7.5%), ash (2 3.5%), alder (2 7.6%), birch (1 1.6%), locust (1 .4%), elm and maple (each 0.9%), poplar (1 .2%), and larch (0 .4%) were planted in the Horka forest district. In the ... 2009 (7 ): 306–311 e floodplain landscape belongs to the youngest geological, geomorphological, and landscape forma- tion in Europe. Both the origin and the d...

Ngày tải lên: 07/08/2014, 03:22

... used indirect methods of counting pellet groups (FPG – Faecal Pellet Group).  e FSC (Fae- cal Standing Crop) method is aimed at counting pellet groups on randomly selected plots normally distributed ... reforestation includ- ing plots No. 12 to 15, (E) Commercial forest including plots No. 10 and 16. RESULTS Based on the repeated counting of faecal pellet groups on 16 marked plots (No....

Ngày tải lên: 07/08/2014, 10:21

... statistically significant finding that in the individual traffic inten- sities (A) 0–1,000 (vehicles/0.5 h), (B)1,001–2,000 (v/0.5 h), (C) ≥ 2,001 (v/0.5 h) collisions with wild- life also are not regular. ... recognizable and whether they are significant. It is unlikely that in future the diversity of landscape will increase (M 1993). When looking at the accel- erating biological an...

Ngày tải lên: 07/08/2014, 10:21

... highest-quality classes being intended mainly for the production of industrial ve- neer while class B1 has slightly lower requirements on the wood quality than class A1 and it starts al- ready with minimal ... minimal diameter of logs 20 cm. Quality classes C1.1–C1.3 represent good quality, average quality and lower quality saw logs, and all have minimal diameter 20 cm. Class C3 is inten...

Ngày tải lên: 07/08/2014, 10:21

... and moderately deep at lower altitudes, mostly medium- skeletal in their organic-mineral layers, and strongly or very strongly skeletal (stony) in deeper layers. In their granulometric composition ... develops poorly and only partial tissue lignification takes place (Table 4). According to the standards set by C et al. (1 990), the content of calcium in the second year o...

Ngày tải lên: 07/08/2014, 10:21