Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "relative growth rate" wg kryterium: Temat


Wyświetlanie 1-8 z 8
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
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:
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:
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:
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:
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:
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
    Wyświetlanie 1-8 z 8

    Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies