Juarez Martins Hoppe

Efeito do volume de tubetes e tipo de substratos na qualidade de mudas de Cryptomeria japonica (L.F.) D. Don.

Cryptomeria japonica (L. F.) D. Don. is a species of great potential for planting in elevated and cold regions of Brazil. It is remarkable for its fast growth, good adaptation to the climate and soil of Southern Brazil, and it also shows a good response to silvicultural technologies. In addition, it is notable for the quality and diversity of its raw material usage for the industries of pulp and paper, plywood, construction of houses, furniture, boats, ships, etc. The experimental plan was bifactorial in the entirely randomized design with 8 treatments, 5 repetitions with 40 seedlings per treatment. The results indicated that for the production of seedlings of this species, the substrate soil + vermiculite showed the best development of the seedlings in 120 cm 3 containers.

Massa específica básica e massa seca de madeira de Eucalyptus grandis sob o efeito do espaçamento de plantio e da posição axial no tronco.

The basic density and dry mass of wood and bark of Eucalyptus grandis W Hill ex-Maiden of growing under twelve tree spacing were investigated. Thirty six trees (three per unit), with age of approximately ten years, coming from experimental units of AFUBRA, were used. Disks at base, DBH, 25, 50, 75 and 100% of trunk commercial height were taken from each tree for determination of wood and bark basic densities. Except for the smaller tree spacing, there was a decrease in basic density and dry mass of wood and bark with increasing planting spacing. The between lines tree spacing that produced the larger values of the studied variables were from 1,5 to 2 m.

Tamanho de amostra para experimentos de Eucalyptus saligna Smith em viveiro.

The present paper work aimend at determining the sample size for experiments of Eucaliptus saligna SMITH in the tree nursery. The experiment eas established at Barba Negra Forest eserve located in the production area of Riocell S.A in Barra do Ribeiro- RS. To determine the ample size, a total of eight blocks with ninety six seedlings each block were used. The measured ariables were: the plant total height and the diameter of the connecting point of root and stem aeasured by a millimeter graduated pachymeter. It was observed that the results obtained in the nursery show that experimental design must be the block at random, using the tray as a lock. The size of the ideal sample to variable diameter is the with 26 seedlings for each eatment with significant minimum difference of 10% and nine seedlings for each treatment when difference goes to 20%. To the difference goes 20%. It is impossible to delineate an experiment when the difference goes to 5% to both variables.

Efeito da intensidade de desrama na produção de Pinus elliottii Engelm., implantado em solo pobre, no estado do Rio Grande do Sul.

The effect of the pruning intensity on the production of Pinus elliottii Engelm. was studied in a randomized block design trial with 5 treatments and 3 repetitions. The treatments were: T1 – control, without pruning; T2 – pruning of the dead branches; T3 – pruning of 40% of the total height; T4 - pruning of 50% of the total height; and T5 – pruning of 60% of the total height. The diameter and wood volume were affected by the pruning intensity of the 11-year old stand. The control (263.5 m 3 /ha) and pruning of the dead branches (245.1 m 3 /ha) were different from all other treatments (pruning of 40% - 231.5 m 3 /ha; pruning of 50% - 225.5 m 3 /ha; and pruning of 60% -211.6 m 3 /ha). The smallest production loss was 12% on the 40% pruning, and the greatest loss was 20% on the 60% pruning treatment. It is concluded that pruning intensities below 40% of the total height should be employed because of the lower production losses, and increases in diameter and quality of the wood.

AS PLANTAS MEDICINAIS COMO INSTRUMENTO DE EDUCAÇÃO AMBIENTAL

This study sought to sensitize the students regarding the conservation and use of themedicinal plants as instrument of Environmental, as alternative treatment. Among the obtainedresults, it is pointed out that 47% were confident in the dose of the medicinal plants, reason ofpossible cases of intoxications. And only 8% of the interviewees they just understood that theEnvironmental Education is inserted in the social subject and has as last purpose the quality of lifeof the people.

Efeito da intensidade de desrama na produção de Pinus elliottii Engelm., no município de Piratini, RS.

The effect of the pruning intensity on the production of Pinus elliottii Engelm. in Piratini, RS, was studied in a randomized block design with four treatments and four replications. The treatments were: T1 - control, without pruning; T2 - pruning of 40% of the total height; T3 - pruning of 60% of the total height; T4 - pruning of 80% of the total height. It was observed that the diameter and wood volume were affected by the pruning intensity of the 13 year old stand. It is concluded that pruning intensities below 40% of the total height should be employed because of the lower production loss, and increment in diameter and quality of the wood.

Estimativa de biomassa em povoamento de Platanus x acerifolia (Aiton) Willd. estabelecido no município de Dom Feliciano, RS.

This study aimed at estimating the biomass in a 5.5-year- Platanus x acerifolia stand, in Dom Feliciano county, Rio Grande do Sul. The inventory in the experimental area was done in five plots (20 m x 30 m each one). Trees were grouped in eight diameter classes, and 3 trees per class were cut. After cutting the trees, a cubing was done and the biomass of each component (leaf, fruit, branch, bark, wood and root) was determined and sampled. The biomasses estimative from each component were done through regression equations adjustment that correlated dendrometric characteristics with biomass volumes from the respective components of the trees. The total biomass was 45,28 Mg h -1 , distributed in: wood 21,07 Mg ha -1 ; branch 11,72 Mg ha -1 ; root 8,43 Mg ha -1 ; bark 2,01 Mg ha -1 ; leaf 1,89 Mg ha -1 and fruit 0,16 Mg ha -1 . The accumulated litter was 12,80 Mg ha -1 .

Comportamento da erva-mate ( Ilex paraguariensis St. Hil.) em consórcio silvicultural.

This paper was carried out at the Federal University of Santa Maria Campus and aimed to determine the mate behavior (Ilex paraguariensis St. Hil.) planted in systems of silvicultural association. Th methodology used consisted of the use of three treatments, corresponding to the association systems of mate X Pinus sp., mate X Mimosa scabrella and mate X bush. The analysis of the results led to the following conclusions: the best mate growing results are obtained in the association with Mimosa scabrella and Pinus sp. And the worst one with the bush. The extreme variations of the environment are softened by the other species of association, high rates luminosity don’t provide a bigger production of dry matter and neither the low rates do.

Produção de Araucaria angustifolia (Bert.) O. Ktze. na região do Planalto Médio do Estado do Rio Grande do Sul.

The present work studies the yield of Araucaria angustifolia (Bert.) O. Ktze. Stands in the region of Planalto Medio of the Rio Grande do Sul state. It has been observed that the variety shows a great variation of prodution, represented by 7 site index with a spacing of 2 mestres of height at the age reference of 40 years. Functions have been adjusted for estimating the height, diametre, form factor and the number of trees per hectare. This analysis has allowed the confection of procuction tables which give a clear idea of the situation of remaining stands, thinning and total production.

Efeito da aplicação de calcário em estacas de Populus deltoides Bartr. ex Marsh cultivadas em vaso.

This work intended to study the behavior of Populus deltoides regarding its development when submitted to different doses of lime. The research was carried out in the Silviculture Tecnology Center, at Universidade Federal de Santa Maria, Santa Maria - RS. The experiment was constituted by forty eight (48) experimental units completely randomized, with six (06) treatments and eight repetitions (08). Each experimental unit was constituted by a vase of three liters containing only one shoot cutting of Populus deltoides . The treatments were constituted by five different doses (T2: 7 tons of lime/ha; T3: 14 tons of lime/ha; T4: 21 tons of lime/ha; T5: 29 tons of lime/ha; T6: 38 tons of lime/ha) plus the testimony, determined with base in the soil analysis used in the experiment. The plants were evaluated, after 120 days of the plantation date, considering its growth in height, its diameter of the neck and its weigh dry of the aerial part. The best average were reached by the treatments without lime and with seven tons of lime for ha in all the parameters observed. The other treatments presented inferior averages, which do not possess significant difference to each other at the level of 5%, for all the observed parameters.