scholarly journals Effect of growth regulator Kelpak SL on the formation of aboveground biomass of Festulolium braunii (K. Richt.) A. Camus

2013 ◽  
Vol 66 (2) ◽  
pp. 149-154 ◽  
Author(s):  
Jacek Sosnowski ◽  
Kazimierz Jankowski ◽  
Beata Wiśniewska-Kadźajan
Keyword(s):  
Growth Regulator ◽  
Aboveground Biomass ◽  
Leaf Blade ◽  
Biomass Yield ◽  
Stem Elongation ◽  
Soil Material ◽  
Natural Plant ◽  
Full Period ◽  
Leaf Greenness ◽  
Greenness Index

A study on the cultivation of <em>Festulolium braunii</em> cv. 'Felopa' was carried out using polyurethane rings with a diameter of 36 cm and a height of 40 cm, which were sunk into the ground to a depth of 30 cm and filled with soil material. In this experiment, Kelpak SL was used as a bioregulator. It consists of natural plant hormones such as auxins (11 mg in dm<sup>3</sup>) and cytokinins (0.03 mg in dm<sup>3</sup>). The experimental factors were as follows: A1-control; A2 – 20% solution of the growth regulator; A3 – 40% solution; and A4 – 60% solution. The preparation was applied to all three regrowths in the form of spray, at a rate of 3 cm<sup>3</sup> ring<sup>-1</sup>, at the stem elongation stage. The full period of this experiment was in the years 2010–2011. During this time, detailed investigations were carried out on aboveground biomass yield (g DM ring<sup>-1</sup>), number of shoots (pcs ring<sup>-1</sup>), leaf blade length (cm), width of the leaf blade base (mm), leaf greenness index (SPAD). The study showed a significant effect of the growth regulator on the formation of <em>Festulolium braunii</em> biomass. However, its highest effectiveness was observed when the 60% solution was applied.

Long-term Effects of Triazol Growth Regulators on Stem Elongation of Rhododendron and Kalmia

HortScience ◽  
1997 ◽  
Vol 32 (3) ◽  
pp. 436E-436
Author(s):  
Martin P.N. Gent
Keyword(s):  
Dose Response ◽  
Growth Regulator ◽  
Stem Elongation ◽  
Spray Application ◽  
Long Term Effects ◽  
Potted Plants ◽  
Response Coefficient ◽  
Wide Range ◽  
Second Year

The persistence of effects of paclobutrazol or uniconazol on stem elongation was determined for several years after large-leaf Rhododendron and Kalmia latifolia were treated with a single-spray application of these triazol growth-regulator chemicals. Potted plants were treated in the second year from propagation, and transplanted into the field in the following spring. The elongation of stems was measured in the year of application and in the following 2 to 4 years. Treatments with a wide range of doses were applied in 1991, 1992, or 1995. For all except the most-dilute applications, stem elongation was retarded in the year following application. At the highest doses, stem growth was inhibited 2 years following application. The results could be explained by a model of growth regulator action that assumed stem elongation was inversely related to amount of growth regulator applied. The dose response coefficient for paclobutrazol was less than that for uniconazol. The dose that inhibited stem elongation one-half as much as a saturating dose was about 0.5 and 0.05 mg/plant, for paclobutrazol and uniconazol, respectively. The dose response coefficient decreased exponentially with time after application, with an exponential time constant of about 2/year. The model predicted a dose of growth regulator that inhibited 0.9 of stem elongation immediately after application would continue to inhibit 0.5 of stem elongation in the following year.

scholarly journals SPAD Leaf Greenness Index: Green Mass Yield Indicator of Maize (Zea mays L.), Genetic and Agriculture Practice Relationship

Plants ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 830
Author(s):  
Piotr Szulc ◽  
Jan Bocianowski ◽  
Kamila Nowosad ◽  
Waldemar Zielewicz ◽  
Joanna Kobus-Cisowska
Keyword(s):  
Mineral Fertilizer ◽  
Group Method ◽  
Growth Stages ◽  
Arithmetic Means ◽  
Stay Green ◽  
Plant Nitrogen ◽  
Green Mass ◽  
The Impact ◽  
Leaf Greenness ◽  
Greenness Index

The study presents the results of two field studies (Experiment I, Experiment II), whose aim was to assess the impact of agriculture factors on maize green mass and leaf greenness index (Soil and Plant Analysis Development, SPAD) in critical growth stages, as well as to determine the relationship between the SPAD index and the yield of green maize for ensiling. It was shown that thermal and humidity conditions in maize growing seasons determined the value of the SPAD leaf greenness index and the yield of maize harvested for silage. Row application of mineral fertilizer (N, NP) and selection of “stay-green” varieties guarantee a higher yield of maize green mass. Growing maize in direct sowing reduces chlorophyll content expressed in SPAD units, thereby reducing plant nitrogen condition, which significantly decreases the yield of biomass intended for silage. The SPAD leaf greenness index determined in critical stages of maize growth can be considered as a yield predictor of green mass for ensiling. The examined maize cultivars were divided into two groups on the basis of hierarchically grouping using the unweighted pair group method of arithmetic means. The first group comprised cultivars SY Cooky and Drim “stay-green,” while the second one included cultivars ES Paroli “stay-green” and ES Palazzo.

scholarly journals Assimilation of Sentinel-2 Estimated LAI into a Crop Model: Influence of Timing and Frequency of Acquisitions on Simulation of Water Stress and Biomass Production of Winter Wheat

Agronomy ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1813
Author(s):  
Andreas Tewes ◽  
Carsten Montzka ◽  
Manuel Nolte ◽  
Gunther Krauss ◽  
Holger Hoffmann ◽  
...  
Keyword(s):  
Water Stress ◽  
Winter Wheat ◽  
Biomass Production ◽  
Aboveground Biomass ◽  
Stem Elongation ◽  
Simulation Models ◽  
Development Stage ◽  
Crop Model ◽  
Area Index ◽  
Sentinel 2

The Sentinel-2 (S2) Toolbox permits for the automated retrieval of leaf area index (LAI). LAI assimilation into crop simulation models could aid to improve the prediction accuracy for biomass at field level. We investigated if the combined effects of assimilation date and corresponding growth stage plus observational frequency have an impact on the crop model-based simulation of water stress and biomass production. We simulated winter wheat growth in nine fields in Germany over two years. S2 LAI estimations for each field were categorized into three phases, depending on the development stage of the crop at acquisition date (tillering, stem elongation, booting to flowering). LAI was assimilated in every possible combinational setup using the ensemble Kalman filter (EnKF). We evaluated the performance of the simulations based on the comparison of measured and simulated aboveground biomass at harvest. The results showed that the effects on water stress remained largely limited, because it mostly occurred after we stopped LAI assimilation. With regard to aboveground biomass, we found that the assimilation of only one LAI estimate from either the tillering or the booting to flowering stage resulted in simulated biomass values similar or closer to measured values than in those where more than one LAI estimate from the stem elongation phase were assimilated. LAI assimilation after the tillering phase might therefore be not necessarily required, as it may not lead to the desired improvement effect.

Isolation of Zeanic Acid, a Natural Plant Growth-regulator from Corn Steep Liquor and Its Chemical Structure

1973 ◽  
Vol 37 (8) ◽  
pp. 1865-1871 ◽  
Author(s):  
Hirochika Matsushima ◽  
Hiroshi Fukumi ◽  
Kei Arima
Keyword(s):  
Plant Growth ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Chemical Structure ◽  
Corn Steep Liquor ◽  
Natural Plant ◽  
Steep Liquor

scholarly journals Morphactin stimulates stem elongation and thickening in decapitated shoots of Bryophyllum calycinum Salisb.

2013 ◽  
Vol 66 (2) ◽  
pp. 21-28 ◽  
Author(s):  
Kensuke Miyamoto ◽  
Agnieszka Marasek-Ciołakowska ◽  
Justyna Góraj ◽  
Elżbieta Węgrzynowicz-Lesiak ◽  
Junichi Ueda ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Growth Regulator ◽  
Stem Elongation ◽  
Specific Inhibitor ◽  
Endogenous Auxin ◽  
Simultaneous Application ◽  
Polar Transport ◽  
Physiological Processes ◽  
Auxin Polar Transport ◽  
Synthetic Growth

Morphactin, methyl 2-chloro-9-hydroxyfluorene-9-carboxylate (IT 3456), is a synthetic growth regulator with a unique action affecting various morphogenetic and physiological processes in plants, and has been characterized as a specific inhibitor of auxin polar transport. Morphactin applied at the last internode in decapitated shoots of <em>Bryophyllum calycinum</em> substantially stimulated elongation and thickening of the internode. Benzyladenine applied alone little affected stem elongation and thickening. Simultaneous application of benzyladenine and morphactin showed a synergistic effect on thickening, while it did not on elongation. These results suggest that morphactin translocated basipetally from the top of the treated internode inhibits auxin polar transport from the internode, resulting in the accumulation of endogenous auxin for elongation and thickening in the treated internode of decapitated shoots of <em>Bryophyllum calycinum</em>.

scholarly journals Isolation of Zeanic Acid, a Natural Plant Growth-regulator from Corn Steep Liquor and Its Chemical Structure

1973 ◽  
Vol 37 (8) ◽  
pp. 1865-1871 ◽  
Author(s):  
Hirochika MATSUSHIMA ◽  
Hiroshi FUKUMI ◽  
Kei ARIMA
Keyword(s):  
Plant Growth ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Chemical Structure ◽  
Corn Steep Liquor ◽  
Natural Plant ◽  
Steep Liquor

scholarly journals Comparison Of Energy Sources Grown On Agricultural Land

2015 ◽  
Vol 12 (2) ◽  
pp. 38-43 ◽  
Author(s):  
Zuzana Jureková ◽  
Dušan Húska ◽  
Marián Kotrla ◽  
Martin Prčík ◽  
Martin Hauptvogl
Keyword(s):  
Biomass Production ◽  
Aboveground Biomass ◽  
Agricultural Land ◽  
Biomass Yield ◽  
Biomass Energy ◽  
Statistical Dependence ◽  
Individual Species ◽  
Miscanthus Sinensis ◽  
Energy Value ◽  
Growing Period

Abstract The aim of the paper is to compare biomass production of energy plants and selected crops grown on arable land in the south-western Slovakia in 2007–2014, its energy value and the influence of decisive climatic factors on the size of the production. The data on yields of dominant crops grown in the agricultural farm were obtained from the statistical data of the farm. Aboveground biomass of willows and poplars was harvested at the end of the harvest cycle. Aboveground biomass of Miscanthus sinensis was harvested in 2010–2014, always in early spring period of the following year. Winter wheat, spring barley and maize grown for silage during the period 2007–2014 provided the lowest yields in 2010 and the highest in 2011 and 2014. The highest energy value was obtained from maize in 2014 (400.66 GJ ha−1). The short rotation coppice poplars of Italian provenance yielded biomass with energy value of 951.68 GJ ha−1 year−1 at the end of the first three-year harvest cycle in 2012. The analysis of variance confirmed that there are highly significant statistical differences in the poplar biomass yield among the varieties and individual experimental years. The fast growing willows of Swedish provenance provided aboveground biomass energy value of 868.88 GJ ha−1 year−1 at the end of the first four-year harvest cycle in 2011. The biomass production of the perennial grass Miscanthus sinensis, depending on the growing period, can be expressed by a polynomial trend function. The highest biomass production was obtained in the third growing period (2012). At the end of the fifth growing period (2014), the yield amounted to 28.60 t ha−1 of the dry aboveground biomass. The energy value of the aboveground biomass of Miscanthus reached 486.20 GJ ha−1 in 2014. Differences in the biomass yield of the Miscanthus genotypes are statistically highly significant in each of the monitored growing periods. The growth and production process of the selected energy species reflect the specificities of soil and climatic conditions of the individual growing periods, as well as the ability of individual species and varieties to provide biomass production in the given conditions. Regression analysis of the produced aboveground biomass of the crops grown in the Kolíňany cadastre has not confirmed a statistical dependence in selected climatic parameterss.

scholarly journals Influence of various chemical compounds on postharvest longevity of cut leaves of Waldsteinia geoides Willd.

2014 ◽  
Vol 67 (3) ◽  
pp. 83-90 ◽  
Author(s):  
Maria P. Ulczycka-Walorska ◽  
Agnieszka Krzymińska
Keyword(s):  
Gibberellic Acid ◽  
Chemical Compounds ◽  
Favorable Effect ◽  
Application Method ◽  
Postharvest Longevity ◽  
Cut Leaves ◽  
Leaf Greenness ◽  
Greenness Index ◽  
Methods Of Application

The influence of conditioning and different methods of application of chemical compounds on cut leaves of <em>Waldsteinia geoides </em>was assessed<em>.</em> Gibberellic acid and benzyladenine at a concentration of 50 or 100 mg × dm<sup>-3</sup>, and 8-hydroxyquinoline sulphate at a concentration of 200 mg × dm<sup>-3</sup> were used in the process of conditioning. The leaves were conditioned in two different ways. In the first one, half of leaf stalks were soaked for 24 hours. In the latter, whole leaf blades were dipped for thirty seconds. Cut leaves were stored either in water or in the solution of 8-hydroxyquinoline sulphate at a concentration of 200 mg × dm<sup>-3</sup>. It was both the chemical compounds applied and the application method that influenced the postharvest longevity of the leaves. The leaves conditioned in 8HQS and stored in water, those conditioned in BA at a concentration of 50 mg × dm<sup>-3</sup> and stored in 8HQS, and those which were not conditioned and stored in 8HQS exhibited the highest level of postharvest longevity. The application of 8HQS for conditioning had a favorable effect on the increase in the weight of<em> Waldsteinia geoides</em> cut leaves<em>.</em> 8HQS applied in storing resulted in a smaller decrease in the values of the leaf greenness index.

scholarly journals APPLICATION OF NATURAL PLANT GROWTH REGULATOR AND COW BIOURINE ON GROWTH AND YIELD OF SHALLOT IN RAINY SEASON (Allium cepa L.)

Agrivet ◽  
2021 ◽  
Vol 27 (1) ◽  
pp. 29
Author(s):  
Supono Budi Sutoto ◽  
Ami Suryawati ◽  
Lagiman Lagiman
Keyword(s):  
Plant Growth ◽  
Allium Cepa ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Rainy Season ◽  
Growth And Yield ◽  
Natural Plant ◽  
Allium Cepa L

scholarly journals Physiological Characteristics of Binahong (Anredera cordifolia (Ten.) Steenis) on Application of Natural Plant Growth Regulator

2019 ◽  
Vol 18 (3) ◽  
pp. 117-122 ◽  
Author(s):  
Yaya Hasanah ◽  
Lisa Mawarni ◽  
Herla Rusmarilin
Keyword(s):  
Plant Growth ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Physiological Characteristics ◽  
Natural Plant
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