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Influence of plant cover on the share of the soil heat flux in the heat balance of the active surface

100%

Eulenstein F., Urbaniak M., Chojnicki B. H., Olejnik J.

International Agrophysics

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2005

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tom 19

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nr 1

2

Reed canopy transparency under different levels of diffuse radiation

86%

Harenda K., Piatyszek M., Chojnicki B. H.

Acta Agrophysica

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2015

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tom 22

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nr 4

Diffused solar radiation increases ecosystem productivity. One of the explanations for this phenomenon is the fact that this type of radiation penetrates the vegetation layer more efficiently, thus changing radiation conditions under the plant canopy. The study of reed transparency under different radiation diffusion conditions makes it possible to estimate the amount of radiation energy that reaches plants living under the reed canopy. The presented radiation parameters were obtained using the SS1 probe (Delta-T Devices Ltd. UK.). The measurements were carried out in September 2014 in a reed canopy in the Rzecin peatland (52°45′N, 16°18′E, 54 m a.s.l.). Analyses showed that the transparency of the reed canopy (Tr) is directly proportional to the degree of diffusion (D*) of the radiation which reaches the plant surface and the reed Tr value is always greater at cloudy conditions than during periods of low radiation diffusion. At the same time, Tr is inversely proportional to the leaf area index (LAI). Under high diffusion of radiation the plants growing under the reed canopy gain approximately 38% radiation energy in comparison with periods characterised by low values of D*.

3

Effect of titanium on assimilation leaf area and chlorophyll content of very early-maturing potato cultivars

86%

Wadas W., Kalinowski K.

Acta Scientiarum Polonorum. Agricultura

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2017

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tom 16

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nr 2

4

Variation of leaf area index and leaf water potential of young dwarf apple trees under different irrigation methods

86%

Senyigir U., Dagdelen N., Askin M. A., Kadayifci A., Ucar Y.

Infrastruktura i Ekologia Terenów Wiejskich

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2013

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nr 1/III

In this research which was carried out inSuleymanDemirel University Research and Application Farm during 2007 and 2008 years, apple leaf area index (LAI) and leaf water potential (LWP) were observed in Jersey Mac (V1) and Williams Pride (V2) young apple varieties budded on M9 rootstock irrigated with different irrigation methods. Drip (D), subsurface drip (SD), surface (S) and undertree micro sprinkler (M) irrigation methods were used in the research. The amount of applied irrigation water was as much as 100% of Class A Pan evaporation measured during five days irrigation intervals. The amount of irrigation water was ranged between 348.3 (D, SD) – 1186 (S, M) mm depending on irrigation methods during the experimental years. Furthermore, maximum and minimum crop evapotranspiration values were determined as 426.1 (DV2) and 1334.7 (MV2) mm respectively. LAI values related to treatments ranged from 0.32 to 0.52 in 2007, 0.73 to 1.12 in 2008. LAI values increased by approximately 126.3% for all treatments. In both years, generally, the highest LAI values were observed in drip irrigation (D) for both varieties. Linear correlation (r=0.99, n=16) was obtained between fruit yields and leaf area index (LAI) values of the apple trees. Leaf water potential (LWP) measurements were repeated one day before and after irrigation during the irrigation period. The measurements were also conducted once along a day in the middle of the season. Changes in value of LWP were similar among the treatments.

5

The effects of green manuring under different fertilisation and tillage regimes on yield components and leaf area index in wheat

86%

Peltonen-Sainio P., Poutala R. T.

Fragmenta Agronomica

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1995

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tom 12

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nr 2

6

Time course of leave area index [LAI], above-ground matter formation and winter triticale yields under different crop management systems

86%

Rozbicki J., Kalinowska-Zdun M., Loboda T., Madry W., Pietkiewicz S., Wyszynski Z.

Fragmenta Agronomica

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1995

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tom 12

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nr 2

7

Effect of leaf area index on the spectral transmittance of solar radiation in greenhouse cultivation of sweet pepper plants

86%

Czarnowski M., Cebula S.

Folia Horticulturae

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1996

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tom 08

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nr 1

8

Age-related changes in leaf area index of young Scots pine stands

72%

Jagodzinski A. M., Kalucka I.

Dendrobiology

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2008

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tom 59

57-65

We studied the chronosequence of six Scots pine (Pinus sylvestris L.) plantations (6-, 9-, 11-, 15-, 17-, and 20-years-old) to examine the changes in leaf area index (LAI) over stand age. The study site was located on a mine spoil heap (outer dumping ground) in the Belchatow lignite open-cast mining district (central Poland). The main goal of the study was to analyze LAI changes over stand age in a chronosequence of young Scots pine stands and to test the relationship between LAI estimates derived from a LAI-2000 Plant Canopy Analyzer and site-specific allometric equations. In addition, we tried to determine whether LAI estimated by a LAI-2000 PCA can be used to accurately estimate forest biomass. We hypothesized that LAI-2000 PCA underestimates LAI of the stands, and that stand age (and linked stand parameters) may influence the range of the hypothetical underestimation due to changes in biomass allocation. Our study revealed that LAI was highly dependent upon stand age and tree density (p<0.0001) regardless of the way how LAI was determined. Moreover, we found that LAI estimated by LAI-2000 PCA significantly correlates with stand biomass per area; the highest coefficients of determination were found for total aboveground biomass, aboveground woody biomass, and stem biomass. This means that data obtained by LAI-2000 PCA are good predictors of stand biomass in the young stages of stand development. In contrast to our prior assumption, the results showed that LAI-2000 PCA overestimates leaf area index. The relative differences between the values obtained with LAI-2000 and those calculated on the basis of the site-specific allometric equations increase with age. This may reflect changes in crown architecture over age caused by enlarging tree dimensions and over - crowding of trees leading to deterioration of light conditions inside the canopy.

9

Metoda oceny wskaźnika powierzchni liści z zastosowanim lotniczego skaningu lidarowego

72%

Popov M., Semko I., Kozak I.

Acta Agrophysica

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2014

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tom 21

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nr 2

Zaproponowana została metoda zdalnej oceny LAI z zastosowaniem materiałów lotniczego skaningu lidarowego. Obliczeniowa część metody opiera się na modelu regresji pomiędzy wartościami wskaźnika LAI i danymi lotniczego skaningu lidarowego. Opracowane zostały równania regresji wielokrotnej. Przedstawione zostały wyniki testowania proponowanej metody, które potwierdzają jej wydajność i wysoką dokładność. Przedstawiony został przegląd nowoczesnych metod oceny wskaźnika powierzchni liści (LAI) – jednego z najbardziej kompleksowych i obiektywnych wskaźników produkcyjnej aktywności roślinności. Krótko opisano naziemne metody oceny LAI oraz ich oprzyrządowanie. Zauważono, że główną i niewątpliwą zaletą naziemnej metody oceny LAI jest wiarygodność uzyskanych wyników. Przy konieczności oceny poziomu aktywności roślinności na dużych obszarach i przy ograniczonych zasobach czasowych, zastosowanie technik naziemnych napotyka poważne trudności. W takich przypadkach bardziej obiecującym okazuje się podejście związane z zastosowaniem zdalnych technik i technologii. Pokazano kierunki ewentualnych dalszych kroków do zwiększenia dokładności metody.

10

Water in the city and remote sensing

72%

Tatosova L., Sinka K., Novotna B., Huska D.

Environment, Earth and Ecology

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2021

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tom 5

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nr 1

11

Simulation of evapotranspiration based on leaf area index, precipitation and pan evaporation: A case study of Poyang Lake watershed, China

72%

Bian Z., Gu Y., Zhao J., Pan Y., Li Y., Zeng C., Wang L.

International Journal of Ecohydrology and Hydrobiology

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2019

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tom 19

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nr 1

12

Wpływ zróżnicowanego udziału pszenicy jarej w zmianowaniu na indeks powierzchni liści (LAI)

72%

Wozniak A.

Acta Agrophysica

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2008

|

tom 12

|

nr 1[161]

13

The effect of foliar application of methanol on sugar beet (Beta vulgaris L.) plants grown in drought conditions

72%

Behrouzyar E. K., Yarnia M.

Annals of Warsaw University of Life Sciences - SGGW. Horticulture and Landscape Architecture

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2017

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tom 38

14

Influence of species composition and forest age on leaf area index

72%

Kram K. J.

Polish Journal of Ecology

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1998

|

tom 46

|

nr 1

15

Modelling of crop and soil parameters using C and L band of SAR images

72%

Dabrowska-Zielinska K., Inoue Y., Kowalik W., Gruszczynska M.

Journal of Water and Land Development

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2005

|

nr 09

16

Ksztaltowanie sie powierzchni lisci dwoch odmian pszenzyta jarego w zaleznosci od jego udzialu w mieszance z pszenica

58%

Szmigiel A., Oleksy A.

Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin

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2004

|

nr 231

211-221

17

Wpływ zmianowania na plonowanie i wartość wskaźnika LAI pszenicy twardej (Triticum durum Desf.)

58%

Wozniak A., Gontarz D., Staniszewski M.

Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin

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2005

|

nr 237-238

13-21

W pracy przedstawiono wpływ zróżnicowanego udziału pszenicy twardej (Triticum durum Desf.) w zmianowaniu na plon ziarna i wartość wskaźnika pokrycia liściowego (LAI). Wykazano, że pszenica twarda uprawiana w monokulturze plonowała istotnie niżej (o 0,91–1,13 t∙ha-1) niż w zmianowaniach z 25, 50 i 75% jej udziałem w strukturze zasiewów. Było to wynikiem mniejszej liczby kłosów na 1 m2, niższej masy ziarna z kłosa i mniejszej liczby ziaren w kłosie. Również powierzchnia liści wyrażona wartością (LAI) była istotnie mniejsza w monokulturze niż w zmianowaniu.

18

Nitrogen deposition and flux through birch stands [Betula pubescens Ehrh.] in the Kampinos National Park [Central Poland]

58%

Kram K. J.

Polish Journal of Ecology

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2008

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tom 56

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nr 4

605-612

Nitrogen flow through birch stand canopies was studied in the Kampinos National Park (large forested area with inland dunes and wetlands close to Warsaw) during the growing seasons (April-October) of 2005–2006. The amount of nitrogen deposition including main forms like NO₃, NH₄, organic N and the aerosolgaseous fraction of deposition were estimated as well as the influence of birch canopies on this process. Because a method of “artificial foliage” allows to measure an aerosol-gaseous fraction of deposition a gradient of rain collectors equipped with artificial foliage of known surfaces were used. The results were compared with amounts of nitrogen measured in the throughfall of three birch forests. All stands (age 20–50 years) were rather similar, but stand II has smaller LAI (Leaf Area Index = 2.5 m² m⁻²) than stands II and III (3.8 and 3.9 m² m⁻²). It was found that nitrogen deposition in the Kampinos National Park is rather high – 1.6 kg ha⁻¹ month⁻¹. Ammoniumnitrogen made almost half of this value, organic nitrogen – over one third, and nitrate-nitrogen constituted the rest. Aerosol-gaseous input significantly made the deposition increased only in the case of nitrate-nitrogen, but deposition of ammonium- and organic nitrogen were similar and independent of catching leaf area. All fractions of nitrogen were effectively taken up during their passing through birch canopies (57% of nitrogen deposition was retained). Generally two thirds of deposited ammonium-nitrogen, more than half of organic N, and one third of nitratenitrogen were taken up by birch canopies. However, uptake efficiency of all N forms was lower for stand with smallest leaf area with no statistically significant retention of organic N.

19

Impact of plant density on the canopy area index and weed infestation depending on different cultivars of winter oilseed rape (Brassica napus L.,ssp. oleifera Metzg.)

58%

Rozylo K., Palys E.

Annales Universitatis Mariae Curie-Skłodowska. Sectio E. Agricultura

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2014

|

tom 69

|

nr 2

20

Influence of soil supplementation with nitrogen and magnesium on the size of assimilation area of maize cultivars (Zea mays L.) differing in genetic profile

58%

Szulc P., Bocianowski J., Rybus-Zajac M.

Electronic Journal of Polish Agricultural Universities. Series Agronomy

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2013

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tom 16

|

nr 2

Ograniczanie wyników

Influence of plant cover on the share of the soil heat flux in the heat balance of the active surface

Reed canopy transparency under different levels of diffuse radiation

Effect of titanium on assimilation leaf area and chlorophyll content of very early-maturing potato cultivars

Variation of leaf area index and leaf water potential of young dwarf apple trees under different irrigation methods

The effects of green manuring under different fertilisation and tillage regimes on yield components and leaf area index in wheat

Time course of leave area index [LAI], above-ground matter formation and winter triticale yields under different crop management systems

Effect of leaf area index on the spectral transmittance of solar radiation in greenhouse cultivation of sweet pepper plants

Age-related changes in leaf area index of young Scots pine stands

Metoda oceny wskaźnika powierzchni liści z zastosowanim lotniczego skaningu lidarowego

Water in the city and remote sensing

Simulation of evapotranspiration based on leaf area index, precipitation and pan evaporation: A case study of Poyang Lake watershed, China

Wpływ zróżnicowanego udziału pszenicy jarej w zmianowaniu na indeks powierzchni liści (LAI)

The effect of foliar application of methanol on sugar beet (Beta vulgaris L.) plants grown in drought conditions

Influence of species composition and forest age on leaf area index

Modelling of crop and soil parameters using C and L band of SAR images

Ksztaltowanie sie powierzchni lisci dwoch odmian pszenzyta jarego w zaleznosci od jego udzialu w mieszance z pszenica

Wpływ zmianowania na plonowanie i wartość wskaźnika LAI pszenicy twardej (Triticum durum Desf.)

Nitrogen deposition and flux through birch stands [Betula pubescens Ehrh.] in the Kampinos National Park [Central Poland]

Impact of plant density on the canopy area index and weed infestation depending on different cultivars of winter oilseed rape (Brassica napus L.,ssp. oleifera Metzg.)

Influence of soil supplementation with nitrogen and magnesium on the size of assimilation area of maize cultivars (Zea mays L.) differing in genetic profile