Search

The purpose of the paper is to assess the impact of using specific teaching tools to students regarding the role and functions of the grassland ecosystem so that they understand the functioning of this ecosystem without anthropogenic intervention. It is important for students to know the role, structure and functioning of this ecosystem because it is one of the richest resources of semi-natural grassland still existing in Europe. These are classified as grasslands with high natural value and high biodiversity. In the sciences of life or biology, we can say that phenomena are understood by students when they can operate with the knowledge acquired in contexts other than those presented in the lesson. Also, in biology lessons we must also focus on what is useful for the further development and activity of the individual. In order to illustrate and explain the grassland ecosystem so that the students can understand and retain it, a division of methods was used, with an informational-operational, but especially participatory-nonparticipatory weight. As a case study, the present paper tried to approach the educational process, life, practical activity. The training through the case mediates a confrontation with a real life situation, authentic, taken as a typical representative example for a general state of affairs. The direct results obtained were analyzed by the increased interest of the students in the lesson about the grassland ecosystem due to the multiple attraction systems generated by its functions as landscape, habitat for rare species of animals and plants, present near houses in the form of lawn, etc. We can appreciate that in the future the presentation of lesson topics in attractive interactive forms will both as a teaching method and as content will contribute to increasing the interest of the students towards the school but you have chosen the life sciences. [ABSTRACT FROM AUTHOR]

Nowadays the species Triticosecale has started to gain ground in Banatului Plain and in Romania, mainly due to the increased yields of biomass and grains in comparison with other cereals and due to the high adaptability to different climate and soil conditions. Triticale is interesting for inbreeding due to its features mainly as fodder plant. Triticale proved during time that it is sensitive to the attack of the cereals pathogens. In Banatului Plain triticale is sensitive to the attack of the fungi Puccinia striiformis (yellow stripe rust) and Drechslera tritici repentis (tan spot). In Banatului Plain tan spot appears in every year, but yellow stripe rust isn't appearing yearly due to its demand for special conditions of temperature and moisture. This research is a case study developed in the spring of year 2018 when climate conditions were favourable to the development of the fungus Puccinia striiformis. Thus, there was monitored an experimental filed comprising nine lines and one variety of triticale in conditions of natural infection. There was evaluated the resistance to this dangerous pathogen of the cereals. The biological material used was: KT 1430 - 10, KWT 13069, 202.567, KT 390, 10T70126, 08TF01, 141 TRICAL, WINTER MAX and TM 01. Attack severity was comprised between 10% (line 10 T 70126) and 90% in line 202.567 that had proved to be the most sensitive from entire experimental field. Frequency of the plants with symptoms was maximal in five triticale lines from experience (F = 100%). Winter Max variety was highlighted by a low attack frequency of 5% plants with symptoms, the lowest from the experiment. All the analysed genotypes were reacted differently to the pathogen attack. Five triticale lines have manifested high sensitivity (FS) to the attack of Puccinia striiformis. Triticale lines 08TF01 and 141Trical and the variety Winter Max have manifested a reaction of sensitivity to the pathogen (S). Moderate resistance was noticed in only one triticale line from experimental field, respectively the line 10T70126. [ABSTRACT FROM AUTHOR]

As a result of global warming, in our country, especially in the West Plain where we conducted our experiment, the effect is clearly visible. In this situation, the autumn crops start their vegetation earlier in spring and are better in facing the summer drought. The paper aims at assessing the growth and development of species Lolium multiflorum L. under the influence of the temperatures recorded in Timişoara until the coming of winter. Thus, The Lolium multiflorum L. crop, SPRINT variety, was set up on the 25th September 2014. The sprouting took place 12 days after that, in which time the average maximum temperature was 15°C and the average minimum temperature was 12°C. The first assessment of the externalization of some characteristics (parameters) of Lolium multiflorum L. under the influence of the temperatures in the vegetation period took place 16 days after that, and the following four assessments were performed at successive seven days intervals. The research revealed that all parameters studied of species Lolium multiflorum L. increased, irrespective of the daily temperature variations in the vegetation periods analysed, and that these parameters are, to a larger or lesser extent, directly influenced by the average daily temperature (AT). Under the conditions in Timisoara in the timeframe of the experiment, there is positive correlation between the sum of temperature degrees (AD) and most characteristics assessed at Lolium multiflorum L. The total sum of temperature degrees (ADT), recorder in Timişoara, in the period under analysis, is correlated with the development of Lolium multiflorum L. plants, respectively with the increase in the main characteristics evaluated: clump height- BH, number of tillers in the clump - SN, clump weight - BW, number of leaves in a clump - LN and of course with the growth of the main root - LPR. In conclusion, the temperatures recorded at Timişoara, between September and November 2014, on a background of optimal moisture conditions, assured the growth and development of Lolium multiflorum L. plants, so these can begin winter well-rooted, with suitable height and number of tillers to survive the harsh winter conditions. [ABSTRACT FROM AUTHOR]

The aim of this work is to analyse a case study regarding the evolution of a turfgrass surface from Timişoara (Timiş County, Romania, respectively the Queen Maria Park turfgrass. The data have been collected in 2011 year in five stages, respectively: 17 February, 18 March, 19 April, 19 May and 16 June. The observations have been realised visually using the NTEP Turfgrass Evaluation Guidelines. There have been considered the following NTEP indexes: density, texture, genetic colour, winter injury, pests and diseases resistance, drought stress and general aesthetic aspect. The ranking scale was from 0 to 9, where 0 represents the worst situation and 9 the best one. The conclusions of the research were the following: (i) the turf has bare soil spots remained after the winter, where at the beginning of spring are setting the weeds; (ii) the turf has many weeds, both monocotyledonous and dicotyledonous, their control being very difficult; (iii) presence of the weeds in turf is a consequence of the inadequate execution of the maintenance works. There is recommended to apply the maintenance work at the proper moment, mainly the over-seeding at the beginning of spring, fertilisation and mowing. [ABSTRACT FROM AUTHOR]