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In the seasons 2008/2009-2010/2011 a strict field experiment was conducted aiming at the estimation of response of winter oilseed rape hybrid cultivars to different cultivation intensity. It was found that a higher level of cultivation technology in comparison with the lower affected a significant increase in the seed yield by 0.5 Mg·ha-1, i.e. 11.9%. This resulted from a significant increase in the...
The aim of this study was to estimate the effect of fertilizer UGmax on the energy, protein and mineral value of feed obtained growing cocksfoot grass, perennial ryegrass and meadow fescue. Experiment with cultivation of those plants was established in 2007. To each of rings with a diameter of 36 cm and height of 40 cm, filled with soil material, 8 seeds of one of the studied species were sown. After...
Based on the literature data, types of morphological and physiological changes occurring in plants during the process of autumn hardening were discussed, as an expression of adaptations to overwintering. They indicate that the level of plant preparation for surviving winter depends on the photosynthesis intensity, leaf area index (LAI) and the development of aboveground part and root system. It was...
The scientific literature rarely describes the harvest index of winter oilseed rape, most probably due to difficulties in its estimation, resulting from the cracking of siliques. Our work aimed at evaluating the harvest index of winter oilseed rape, depending on the cutting height of plants of different size categories, described in the 1st part of our work. Plants harvested from the field were dried,...
The research aim was to evaluate the productivity of two winter oilseed rape cultivars, Adam and Poznaniak, in three localities in the south of Poland: Głubczyce, Pawłowice and Prusy. The scope of comparisons was broaden through a detailed biometrical analysis of plants and the spectral properties (GAI, LAI and SPAD) of canopy, which determine oilseed rape productivity. At the optimal plant density...
Catch crop cultivation with the aim of incorporation should be a constant element of improving soil fertility. The most frequently recommended type of green manures for vegetables is stubble catch crops. It is not always possible to sow plants at the optimum date, that is in the second half of July. The aim of the study was to determine the yield of fresh and dry matter of stubble catch crops and...
Research was carried out in years 2007-2009 on the basis of field experiment in split-plot design, in three repetitions. Monoculture lawn was set up for the experiment. In pure sowing, four species of lawn grass were studied: perennial ryegrass, red fescue, common meadow-grass, and common bent. In the experiment, the following factors were applied: bedding type: a – no hydrogel „0” – control plot;...
Weed control is an important cultivation treatment in the cultivation of maize, while the time of conducting it, limited by the plant developmental stage, determines the yield height and financial outcome. However, the use of chemical plant protection products on ecological farms is not allowed, therefore, the level of obtained yields and economic effects of this species cultivation is largely affected...
Cereals are exposed to considerable losses caused by harmful insects. In the years of the study of production and economic effects of pest control in winter wheat, leaf beetle larvae damaged from 31.6 to 49.8% of leaf blade area. The aim of this study was to evaluate the effectiveness and economic efficiency of the insecticides applied in leaf beetle larvae control in winter wheat. The assessment...
The aim of this study was to evaluate weed infestation (the number, biomass and species composition) of husked and naked oats canopy depending on the soil tillage system (conventional, simplified with a catch crop, simplified, direct sowing) and the method of plant cultivation (mechanical and chemical) The study was carried out in 2000- -2002, in Alfisols, formed from loess. The subject of the investigation...
Haploid maize plants are obtained using in vitro androgenesis in anther cultures and isolated microsphores, as well as in vivo, through obtaining maternal haploid lines created as a result of pollination with an inducer. DH lines obtained in vivo are gaining importance in heterosis maize breeding. The aim of this study was to evaluate the genetic variability of 11 maize haploid offspring, derived...
Mid-forest meadows have a high natural value, due to preserving unique meadow and ecotone biotopes, similar to the natural state. Due to their dissimilarity, they also had a considerable effect on the functioning of forest ecosystems they border. The aim of the study conducted in 2006-2010 in the Bukówka river valley was to assess the natural values of mid-forest meadows with the Oświt method [2000]...
Economic, organizational and natural determinants of modern plant field production enforce far-reaching limitations of classical components of cultivation regime. In 2010-2012, a study was carried out at the Agricultural Production Farm in Kowróz (Kuyavian-Pomeranian voivodeship) in soil of the very well rye complex. This study aimed at determining the effect of plowing tillage, reduced tillage and...
The effect of water extracts from common buckwheat (Fagopyrum esculentum Moench) tissues on seed germination and seedling growth of winter wheat and lettuce was examined. Two kinds of extracts were evaluated: from the aboveground parts and roots of common buckwheat (cv. Hruszowska). The effect of extracts was dependent on their kind, the time of action and the species of studied plants. Lettuce seeds...
Cost reduction in plant production, as well as ecological aspects, force farmers to apply numerous modifications in tillage. Usually, they consist in shallowing ploughing and replacing it with cultivating measures not overturning the soil. The aim of the study was determination of the effect of conventional and reduced tillage systems as well as of two levels of mineral fertilization on the yield...
Municipal sewage sludge has a lot of organic matter and is a rich source of nutrients, thus generating interest as a cheap fertilizer. The amount of the sewage sludge dose used in agriculture to fertilize crops is determined by law and its application should be in accordance with the rules of the EU. The problem is to determine the rate of release of nutrients from sewage sludge and intake speed of...
Greater vigour of plants that border with unsown areas, known as border effect, compensates for the use of tramlines in the lowland meadow but also gives an error to the results of field experiments. This phenomenon is well-known for certain cultivated plant species. However, there is a lack of publications which would make it possible to analyze and compare the border effect of several plant species...
The aim of the study was to evaluate the effect of diversified nitrogen fertilization doses and application of various doses of herbicide Starane 250 EC on the total protein efficiency and carbohydrate:protein ratio of meadow sward. Two-factor field experiment was established on permanent meadow in the spring of 2007 in Żelków near Siedlce in a randomized subblock design in three repetitions. First...
This work presents the evaluation of resources and quality of organic matter in arable luvisols of the Siedlce Upland. This was performed based on determination of organic carbon content and fraction composition of organic matter as well as of quantitative analyses of humic acids in humus horizons of twelve soil profiles. In the studied humus horizons a number of features were found indicating the...
Polyamines are widely involved in biological processes in plants including growth and development, as well as in the response to stress. However, the interpretation of polyamine participations in the induction of flowering of winter plants, and, hence, the possibility of their exogenous application to accelerate flowering, is ambiguous. Winter plants require prolonged exposure to low temperatures...
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