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Effect of Mowing Height on Dominance of Annual Poaceae Plants

100%

Inagaki H. , Saiki C. , Ichihara M. , Matsuno K. , Tanno Y. , Yamashita M. , Sawada H.

tom Vol. 21, nr 1

8--13

Mowing weeds in rice paddy field ridges is essential for weed management. However, excessive mowing causes the dominance of the Poaceae weeds, which are host plants for rice stink bugs. In this study, the authors hypothesized that high mowing is more effective than low mowing in decreasing the dominance of Poaceae weeds. The dominance of the Poaceae weeds between high mowing (cut at a height of 5–10 cm) and low mowing (cut at ground level) was compared across 5 sites. As a result, the cover-abundance ratings of the Poaceae weeds were lower in the high mowing plots than that in the low mowing plots in all sites. In addition, the biodiversity index was higher in the high mowing plots than in the low mowing plots in each site. It was concluded that the increased mowing height effectively decreased the dominance of Poaceae weeds and this can be used as a strategy for controlling rice stink bugs.

The Influence of Elements of Technology and Soil-Climatic Factors on the Agrobiological Properties of Onobrychis Viciifolia

72%

Kovalenko V. , Tonkha O. , Fedorchuk M. , Butenko A. , Toryanik V. , Davydenko G. , Bordun R. , Kharchenko S. , Polyvanyi A.

tom Vol. 25, iss. 5

179--190

The significance of this study stems from the imperative to justify and advance agrobiological foundations aimed at enhancing the cultivation practices of Onobrychis viciifolia. There exists a compelling necessity to refine agronomic methodologies and streamline their comprehensive efficacy within the technological phases of cultivation. This study is aim to provide a critical analysis of scientific problem of substantiation of biological and organic foundations of the technology of Onobrychis viciifolia growing. Innovative technological interventions were formulated by extrapolating discerned patterns of influence pertaining to climatic and meteorological factors. Patterns governing the growth, development, and productivity formation of Onobrychis viciifolia were identified, and both the theoretical and practical principles of contemporary methods for cultivating perennial legumes were established. The chemical compound of aboveground biomass of Onobrychis viciifolia is varied depending on researched factors. Fertilization practically did not increase the productivity of Onobrychis viciifolia. The natural fertility of low-humus chernozem soil ensures the formation of a high, stable yield without fertilizing. This is the evidence that Onobrychis viciifolia compares favorably with other perennial legumes. Due to its biological characteristics, it is much more effective, especially in leveraging natural factors for the yield formation, i.e., it plays a significant role in the biologization of plant production, and in obtaining the most environmentally friendly, high–quality, yet cheap feed. The outcomes derived from the conducted research indicate that, under uniform soil conditions and varying fertilizer levels, the mowing height emerges as the predominant factor. The highest concentrations of nutrients within the overground biomass of Onobrychis viciifolia were noted at a cutting altitude of 11 centimeters. Concurrently, an elevation in crude protein and ash content was observed, accompanied by a concomitant reduction in the index of crude fiber.

Wartość pokarmowa lucerny w zależności od sposobu siewu, częstotliwości i wysokości koszenia

51%

Klicka I. , Grochot G. , Fordonski G. , Gronowicz Z.

tom 60

55-62

W trzech seriach 3-letnich ścisłych doświadczeń polowych przeprowadzonych w latach 1982-1986 w RZD w Bałcynach badano wpływ sposobu siewu, częstotliwości i wysokości koszenia na wartość pastewną lucerny mieszańcowej. Najwyższe plony białka ogółem za okres 3 lat wegetacji uzyskano wsiewając lucernę w owies zbierany na zieloną masę. Zbiór lucerny w fazie pakowania (co 30 dni) dostarczył paszy o wysokiej jakości (niska zawartość włókna), lecz bardzo wyraźnie obniżył plony białka z l ha. Niskie koszenie roślin zwiększyło plon białka bez pogorszenia wartości pokarmowej lucerny mieszańcowej.

The effects of different sowing techniques and of different frequency and height of cutting on nutritive value of lucerne were studied in the course of field experiments carried out in the years 1982-1986 in Bałcyny. Over the whole three-year-long period, the highest yield level of protein was obtained in the case of lucerne sown in oats cropped for green matter. Cropping lucerne in the bud phase (every 30 days) allowed to obtain a high quality fodder (with a low fibre content), but at the same time significantly decreased the yield level of protein per ha. However, low plant cutting increased the yield level of protein without effecting nutritive value of lucerne in a negative way.