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    Wyświetlanie 1-9 z 9
    Tytuł:
    The Growth Rate of Water Hyacinth (Eichhornia crassipes (Mart.) Solms) in Rawapening Lake, Central Java
    Autorzy:
    Prasetyo, Syarif
    Anggoro, Sutrisno
    Soeprobowati, Tri Retnaningsih
    Powiązania:
    https://bibliotekanauki.pl/articles/1838296.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    Rawapening
    Eichhornia crassipes
    mesocosm
    relative growth rate
    doubling time
    Opis:
    Rawapening Lake is one of Indonesia’s national priority lakes that is experiencing environmental problems which are urgently required to be solved due to its functions. The decline in the environmental quality of Rawapening Lake includes sedimentation, water pollution and excess of nutrients, especially Phosphorus (P) and Nitrogen (N) into the lake that induced uncontrolled growth of aquatic plants, one of which is water hyacinth (Eichhornia crassipes (Mart.) Solms). Many activities had been done to reduce the covering of water hyacinth in Rawapening Lake that tends to increase by the time, but no significant result has been achieved. Therefore, this research was conducted in order to study the growth rate of water hyacinth with mesocosm in Rawapening Lake as a baseline to develop suitable management. There were three different sites, namely: Site I in the floating net cage area (FNCA), Rowoboni Village, Site II in the natural area of Bejalen Village which is far from the aquaculture sites, and Site III in the upper reaches of the Tuntang river, Asinan Village. The research was performed in November-December 2019 with the measurements of growth rate, addition number clump and water hyacinth covering every week. The experiment was conducted in the 1 x 1 meter mesocosm, with three replication in every site. In every mesocosm water hyacinth with similar initial weight of 160 grams and number of leaves 6-7 strands were grown in the mesocosm. On day 7 (H7) the average wet weight of water hyacinth increased by 201%. In the fourth week (H28) the average wet weight of water hyacinth increased by 788% compared to the initial weight when planted. The highest relative growth rate (RGR) value of water hyacinth was at site III (7.26%/ day), followed by Site I (7.03%/day), and Site II (6.40%/day), respectively. The doubling time (DT) value of water hyacinth at the site I was 9.9 day, site II – 10.8 day, and site III – 9.6 day. One clump of water hyacinth weighing 160 grams was able to cover 1 m2 of mesocosm within 21 days. On the basis of these results, to manage water hyacinth blooms one has to consider its growth rate.
    Źródło:
    Journal of Ecological Engineering; 2021, 22, 6; 222-231
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Growth Rate of Water Hyacinth (Eichhornia crassipes (Mart.) Solms) in Rawapening Lake, Central Java
    Autorzy:
    Prasetyo, Syarif
    Anggoro, Sutrisno
    Soeprobowati, Tri Retnaningsih
    Powiązania:
    https://bibliotekanauki.pl/articles/1838362.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    Rawapening
    Eichhornia crassipes
    mesocosm
    relative growth rate
    doubling time
    Opis:
    Rawapening Lake is one of Indonesia’s national priority lakes that is experiencing environmental problems which are urgently required to be solved due to its functions. The decline in the environmental quality of Rawapening Lake includes sedimentation, water pollution and excess of nutrients, especially Phosphorus (P) and Nitrogen (N) into the lake that induced uncontrolled growth of aquatic plants, one of which is water hyacinth (Eichhornia crassipes (Mart.) Solms). Many activities had been done to reduce the covering of water hyacinth in Rawapening Lake that tends to increase by the time, but no significant result has been achieved. Therefore, this research was conducted in order to study the growth rate of water hyacinth with mesocosm in Rawapening Lake as a baseline to develop suitable management. There were three different sites, namely: Site I in the floating net cage area (FNCA), Rowoboni Village, Site II in the natural area of Bejalen Village which is far from the aquaculture sites, and Site III in the upper reaches of the Tuntang river, Asinan Village. The research was performed in November-December 2019 with the measurements of growth rate, addition number clump and water hyacinth covering every week. The experiment was conducted in the 1 x 1 meter mesocosm, with three replication in every site. In every mesocosm water hyacinth with similar initial weight of 160 grams and number of leaves 6-7 strands were grown in the mesocosm. On day 7 (H7) the average wet weight of water hyacinth increased by 201%. In the fourth week (H28) the average wet weight of water hyacinth increased by 788% compared to the initial weight when planted. The highest relative growth rate (RGR) value of water hyacinth was at site III (7.26%/ day), followed by Site I (7.03%/day), and Site II (6.40%/day), respectively. The doubling time (DT) value of water hyacinth at the site I was 9.9 day, site II – 10.8 day, and site III – 9.6 day. One clump of water hyacinth weighing 160 grams was able to cover 1 m2 of mesocosm within 21 days. On the basis of these results, to manage water hyacinth blooms one has to consider its growth rate.
    Źródło:
    Journal of Ecological Engineering; 2021, 22, 6; 222-231
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Growth analysis using curve fitting method in early and late sown sunflower.
    Autorzy:
    Parmar, N.G.
    Chanda, S.V.
    Powiązania:
    https://bibliotekanauki.pl/articles/2198853.pdf
    Data publikacji:
    2002-06-23
    Wydawca:
    Instytut Hodowli i Aklimatyzacji Roślin
    Tematy:
    growth analysis
    sunflower
    relative growth rate
    net assimilation rate
    leaf area ratio
    specific leaf area
    leaf weight ratio
    Opis:
    Effect of sowing time on productivity of sunflower was studied. Sunflower seeds were first sown in August (early) and the second sowing was done in September (late). Growth analysis was done at an interval of 5-6 days from germination to maturation. Growth was measured in terms of dry weight and leaf area. Various growth indices like RGR, RLGR, NAR, LAR, LWR, SLA, etc. were calculated. Cubic polynomial was the best fit for all the growth parameters. The dry matter accumulation, leaf area, leaf dry weight and leaf number were significantly more in late grown crop than early grown one. The rate of total dry weight, leaf area and leaf dry weight were higher in late grown crop as compared to early grown one. RGR, RLGR and NAR were higher in the late grown crop from the beginning, which gradually decreased later on, in both the crops. LAR was distinctly more in late grown crop between d 30-40. Changes in SLA were similar to LAR while LWR was more in the beginning and decreased afterwards. RGR showed more correlation with NAR and very low correlation with LAR in both the crops. Thus it is concluded that the late sown crop had better growth, but still, to obtain maximum productivity in sunflower, improvement in RGR and NAR is required.
    Źródło:
    Plant Breeding and Seed Science; 2002, 46, 1; 61-69
    1429-3862
    2083-599X
    Pojawia się w:
    Plant Breeding and Seed Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The profiling of osmotic adjustment and water status in Apera intermedia exposed to salinity
    Autorzy:
    Yildiztugay, E.
    Ozfidan-Konakci, C.
    Kucukoduk, M.
    Duran, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/80567.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    conference
    osmotic adjustment
    water status
    Apera intermedia
    salinity
    relative growth rate
    relative water content
    salt stress
    thiobarbituric acid reactive substance
    Źródło:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 2
    0860-7796
    Pojawia się w:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Growth and Yield Response of Maize (Zea mays L.) to a Wide Range of Nutrients on Ferralsols of Western Kenya
    Autorzy:
    Otieno, Hillary M. O.
    Powiązania:
    https://bibliotekanauki.pl/articles/1075498.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Agronomic efficiency
    Zea mays
    crop growth rates
    fertilizer application
    maize
    micronutrients yield response
    nitrogen response
    phosphorus response
    potassium response
    relative growth rate
    Opis:
    Declining soil fertility is one of the main causes of low yields of maize. Farmers apply low rates of unbalanced nutrients leading to further nutrient mining. A randomized complete block nutrient omission trial with six replications was therefore set to determine maize response to the application of a wide range of nutrients from inorganic fertilizers on Ferralsols. The treatments were NK, NP, PK, NPK, and NPK + CaMgZnBS. The results showed that application of PK fertilizer resulted in low crop growth rate (CGR), and relative growth rate (RGR), and biomass compared to other treatments. Application of a wider range of nutrients (NPK + CaMgZnBS treatment) improved maize growth and yield compared to other treatments. In terms of grain response, Urea application recorded the highest yield (1800 kg/ha) followed by Triple Superphosphate (1300 kg/ha) then Muriate of potash (1100 kg/ha) and least by a combined application of secondary nutrients and micronutrients (ZnBMgCaS = 400 kg/ha). Highest agronomic efficiency of 32.5 kg grain /kg P applied was recorded due to P followed by K (27.5 kg grain /kg K) and least by N (15 kg grain /kg N). Based on the combined effect, application of N-P-K based fertilizers could give better yields. Use of micronutrients should be assessed further for conclusive recommendations.
    Źródło:
    World Scientific News; 2019, 129; 96-106
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dobór spółek do portfela z wykorzystaniem wskaźników finansowych i ich względnego tempa przyrostu. analiza w latach 2001-2010
    Stock Selection Based on Financial Ratios and Relative Growth Rate of Financial Ratios. Analysis between 2001 and 2010
    Autorzy:
    Węgrzyn, Tomasz
    Powiązania:
    https://bibliotekanauki.pl/articles/591492.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Ekonomiczny w Katowicach
    Tematy:
    Badania empiryczne
    Portfel inwestycyjny
    Spółki giełdowe
    Wskaźniki finansowe
    Empirical researches
    Financial indicators
    Investment portfolio
    Stock market companies
    Opis:
    The purpose of the article is to check if proposed method of assessing companies can point out one of the five quantile portfolios that systematically are giving better performance than a benchmark portfolio. Companies are chosen to portfolios due to their position in the ranking that is constructed on the base of the nominal values of chosen financial ratios and a relative growth rate of them. The author uses data of companies listed on the WSE between 2001 and 2010. The rankings and portfolios are built separately for each year. As a result, it can be stated that the second portfolio and the forth portfolio of the ranking are systematically giving higher rate of return than the benchmark portfolio. Among that two portfolios, the second portfolio of the ranking gives higher geometric average return. Moreover, the forth portfolio has lower average risk than the second portfolio of the ranking. However, the Sharpe ratio cannot unambiguously points out one of analysed portfolios is better than the other.
    Źródło:
    Studia Ekonomiczne; 2013, 174; 63-74
    2083-8611
    Pojawia się w:
    Studia Ekonomiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ pokarmu na imagines chrabąszczy Melolontha melolontha i M. hippocastani
    Effects of food source quality on the adults of Melolontha melolontha and M. hippocastani
    Autorzy:
    Woreta, D.
    Lipiński, S.
    Wolski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1295010.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    entomologia lesna
    szkodniki roslin
    chrabaszcz majowy
    Melolontha melolontha
    chrabaszcz kasztanowiec
    Melolontha hippocastani
    owady dorosle
    przyrost masy ciala
    przezywalnosc
    dlugosc zycia
    plodnosc
    pokarm
    preferencje pokarmowe
    forest cockchafer
    common cockchafer
    forest pests
    relative growth rate
    mortality
    food quality
    Opis:
    This paper presents the results of studies on the life span, survival, weight and fecundity of the forest cockchafer (Melolontha hippocastani, Fabricius, 1801) and the common cockchafer (Melolontha melolontha, Linnaeus, 1758) beetle feeding on Alnus glutinosa (L.) Gaertn., Betula pendula Roth., Carpinus betulus L., Fagus sylvatica L., Larix decidua Mill., Prunus serotina (Ehr.) Borkh., Quercus petraea (Matt.) Liebl., Quercus robur L., Robinia pseudoacacia L., Sambucus nigra L. and Sorbus aucuparia L. em. Hedl. The lifespan and weight of beetles as well as female fertility were examined in 2011 and 2013. Specimen for laboratory tests were collected in the field shortly after leaving their overwintering sites in the soil and identical experimental protocols were applied to both examined species. 576 and 432 beetles were tested in 2011 and 2013, respectively. In 2011, beetles were feeding on A. glutinosa, B. pendula, F. sylvatica, L. decidua Q. petraea leaves and on C. betulus, P. serotina, R. pseudoacacia, S. aucuparia and S. nigra in 2013. Both years, beetles feeding on Q. robur leaves were examined as a control. Our results showed that feeding on leaves of Q. robur and Q. petraea had the largest positive impact on the life time, weight and fecundity of the studied beetles. Leaves of F. sylvatica and L. decidua also constituted an adequate food source for the development of M. melolontha. M. hippocastani, however, did not perform as well when feeding on these two tree species. Females of M. melolontha reared on leaves of B. pendula did not lay eggs. The following plant species had a negative impact on the survival and development of the collected specimen and female fertility: A. glutinosa, S. nigra, P. serotina and R. pseudoacacia. Neither beetle species fed on the leaves of A. glutinosa or S. nigra.
    Źródło:
    Leśne Prace Badawcze; 2016, 77, 1
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Przeżywalność i wzrost pędraków Melolontha spp. na korzeniach głównych gatunków drzew leśnych
    Survival and growth of the Melolontha spp. grubs on the roots of the forests main tree species
    Autorzy:
    Woreta, D.
    Sukovata, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1313140.pdf
    Data publikacji:
    2014
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    ochrona lasu
    drzewa lesne
    sadzonki
    dab szypulkowy
    Quercus robur
    dab bezszypulkowy
    Quercus petraea
    buk zwyczajny
    Fagus sylvatica
    brzoza brodawkowata
    Betula pendula
    olsza czarna
    Alnus glutinosa
    modrzew europejski
    Larix decidua
    sosna zwyczajna
    Pinus sylvestris
    korzenie
    szkodniki roslin
    zerowanie
    Melolontha
    pedraki
    przezywalnosc
    masa ciala
    Alnus
    glutinosa
    relative growth rate
    mortality
    food quality
    Opis:
    The survival, weight and relative growth rate (RGR) of the Melolontha spp. grubs feeding on roots of Quercus petraea, Q. robur, Fagus sylvatica, Betula pendula, Larix decidua, Alnus glutinosa and Pinus sylvestris were examined. Overall, the youngest grubs, L1, were the most affected by food quality. The mortality of the grubs feeding on the roots of A. glutinosa changed most rapidly and, consequently, LT50 was the shortest (25.9 days), whereas the slowest changes in mortality with the highest LT50 values were observed on the two oak species (54.9 and 44.9 days on Q. robur and Q. petraea, respectively). The RGRs of the L1 grubs were the highest on oaks, F. sylvatica and B. pendula. The overall rate of survival of the older grubs was high (66.7-100%). It was the lowest on the roots of B. pendula (L2 grubs) and L. decidua (L3 grubs), which at the same time displayed the highest RGRs. The interpretation of the results is difficult due to the lack of basic knowledge on the potential effects of food quality and other factors on grub metamorphosis. There is no doubt, however, that among the seven tested tree species the roots of A. glutinosa are the least favorable for the Melolontha grubs' performance.
    Źródło:
    Leśne Prace Badawcze; 2014, 75, 4; 375-383
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of zinc foliar application at an early stage of maize growth on patterns of nutrients and dry matter accumulation by the canopy. Part II. Nitrogen uptake and dry matter accumulation patterns
    Wplyw dolistnego stosowania cynku we wczesnej fazie wzrostu kukurydzy na wzorce akumulacji skladnikow pokarmowych i suchej masy przez lan. Cz.II. Wzorce pobierania azotu i akumulacji suchej masy
    Autorzy:
    Grzebisz, W
    Wronska, M.
    Diatta, J.B.
    Szczepaniak, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/14901.pdf
    Data publikacji:
    2008
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
    Tematy:
    nitrogen uptake
    growth analysis
    nutrient
    accumulation
    relative plant growth rate
    dry matter accumulation
    plant cultivation
    zinc application
    absolute crop growth rate
    growth early stage
    canopy
    dry matter
    foliar application
    maize
    Opis:
    A two-year field trial was carried out in order to outline reasons of maize grain yield increase due to foliar application of zinc, and to evaluate its effects on the dynamics of nitrogen and dry matter accumulation in the course of the growing season. Growth analysis methods were applied to describe the trends exhibited by the canopy and plant’s growth. Maize plants fertilized with zinc were able to increase the rate of nitrogen uptake, as indicated by the values of absolute crop uptake rate for N (CUR-N), at two distinct time-separated phases of growth, i.e., (i) from 7th to 9th leaf and (ii) from milk to physiological maturity of kernels growth. Physiological processes occurring in these two time-separated phases resulted in an increase of maize yielding capacity. The effect of zinc as recorded in the first phase resulted in extension rate of new organs or tissues ingrowth, as confirmed by the RGR analysis. At the reproductive phase of maize growth, plants well supplied with zinc accumulated more nitrogen, which was a prerequisite for significantly higher rate of dry matter accumulation, as confirmed both by CGR and RGR analyses. The amount of extra nitrogen taken up by Zn treated plants was sufficiently high to increase grain yield by 1.5 t ha-1, which was achieved in the conducted experiment.
    Dwuletnie doświadczenie polowe przeprowadzono w celu wyjaśnienia przyczyn wzrostu plonu ziarna kukurydzy dolistnie traktowanej nawozem cynkowym i oceny jego wpływu na dynamikę procesów akumulacji azotu i suchej masy w okresie wegetacji. Do opisu uzyskanych trendów zastosowano metody analizy wzrostu łanu i rośliny. Kukurydza nawożona cynkiem była w stanie, jak wykazały wartości wskaźnika absolutnej szybkości pobierania azotu przez łan (CUR-N), zwiększyć pobieranie azotu w dwóch czasowo różnych fazach rozwoju, to znaczy (i) od fazy 7. do 9. liścia oraz (ii) od fazy dojrzałości mlecznej do fizjologicznej ziarniaków. Procesy fizjologiczne ujawniające się w tych dwóch czasowo odległych fazach rozwoju kukurydzy determinowały wzrost potencjału produkcyjnego kukurydzy. Działanie cynku w pierwszej fazie przejawiło się wzrostem szybkości akumulacji azotu, który spowodował wydłużenie fazy intensywnego przyrostu nowych tkanek lub/i organów, jak potwierdziła analiza RGR. W fazie reproduktywnej rozwoju kukurydzy rośliny dobrze odżywione cynkiem akumulowały azot z większą szybkością, co było podstawowym warunkiem zwiększonej akumulacji suchej masy, potwierdzonej analizami CGR i RGR. Ilość azotu pobranego ekstra przez rośliny nawożone cynkiem była dostatecznie duża do wzrostu plonu ziarna o 1,5 t ha-1, co uzyskano w przeprowadzonym eksperymencie.
    Źródło:
    Journal of Elementology; 2008, 13, 1
    1644-2296
    Pojawia się w:
    Journal of Elementology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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