Categories
Plants

Useful Survey: A Compelling Tool For Plant Leaf Data

We have worked on Petiole, a leaf area meter in a smartphone, for more than 5 years. Hence, we obtained many insights about our customers. We know how we can help to do leaf area analysis. Petiole Leaf Area is a real example of capturing plant leaf data using digital technologies. Hence, what we are doing now – exploring. We collect feedback from our customers to understand what other feature of Petiole is better to work on.

By the way, do you have any ideas?

Categories
Plants

An Update on Plant Photobiology and Implications for Cannabis Production

Abstract

This review presents recent developments in plant photobiology and lighting systems for horticultural crops, as well as potential applications for cannabis (Cannabis sativa and C. indica) plant production. The legal and commercial production of the cannabis plant is a relatively new, rapidly growing, and highly profitable industry in Europe and North America.

However, more knowledge transfer from plant studies and horticultural communities to commercial cannabis plant growers is needed. Plant photosynthesis and photomorphogenesis are influenced by light wavelength, intensity, and photoperiod via plant photoreceptors that sense light and control plant growth. Further, light properties play a critical role in plant vegetative growth and reproductive (flowering) developmental stages, as well as in biomass, secondary metabolite synthesis, and accumulation. Advantages and disadvantages of widespread greenhouse lighting systems that use high-pressure sodium lamps or light-emitting diode (LED) lighting are known.

Some artificial plant lighting practices will require improvements in cannabis production. By manipulating LED light spectra and stimulating specific plant photoreceptors, it may be possible to minimize operation costs while maximizing cannabis biomass and cannabinoid yield, including tetrahydrocannabinol (or Δ9-tetrahydrocannabinol) and cannabidiol for medicinal and recreational purposes.

The basics of plant photobiology (photosynthesis and photomorphogenesis) and electrical lighting systems are discussed, with an emphasis on how the light spectrum and lighting strategies could influence cannabis production and secondary compound accumulation.

Categories
Plants

Happy New 2020 Year with Petiole!

Happy New 2020 Year with Petiole!
Happy New 2020 Year with Petiole!
Categories
Plants

Sedate a Plant and It Seems to Lose Consciousness. Is It Conscious?

Plants don’t get enough credit.

They move. You know this. Your houseplant salutes the sun each morning. At night, it returns to center.

You probably don’t think much of it. This is simply what plants do: Get light. Photosynthesize. Make food. Live.

But what about all the signs of plant intelligence that have been observed?

Categories
Petiole Plants

Evaluation Methods Of Estimation of Young Apple Trees Leaf Area

The analysis of the three measurement methods of leaf blade area of young bi-axis apple trees on rootstock 54-118 was made. High accuracy of the measurement results by a method of area calculation within a leaf contour on millimeter graph paper (31, 21 sq.cm ) and with help of a method of computer sight using application “Petiole” on Smartphone with operational system Android (31, 28 sq.cm ) was established. The gravimetric method and the use of mobile application “Petiole” appeared to be the most productive as to time consumption to carry out the operation.

Key words: leaf blade area, definition methods, computer sight, millimeter graph paper method, gravimetric method, “Petiole” application, bi-axis apple tree.

Authors: O. V. Polunina, Post-graduate Student, Uman National University of Horticulture (Uman), Ukraine
V. P. Maiboroda, PhD in Agricultural Sciences, Associate Professor, Uman National University of Horticulture (Uman), Ukraine
A. Y. Seleznov, Chief Technology Officer at Petiole LTD, Ukraine

Categories
Plants

Effects of single basal application of coated compound fertilizer on yield and nitrogen use efficiency in double-cropped rice

Abstract

Fertilizer plays an important role in increasing rice yield. More than half of all fertilizer applied to the field is not taken up, resulting in environmental damage and substantial economic losses. To address these concerns, a low-cost, coated compound fertilizer named “Xiang Nong Da” (XND), requiring only a single basal application, was studied. A two-year field experiment was conducted to test the effects of XND application on rice yield and nitrogen fertilizer use efficiency. An ordinary uncoated compound fertilizer (UNCF), with 20% more nutrients and split application was selected as the control. The yield of XND-treated rice was only 3.1% lower than that of the control, an insignificant difference. There were no significant differences between N use efficiency indices of the two fertilizer treatments except for N partial factor productivity (PFP N). PFP N of XND treatment was 19.7%–23.2% higher than the control, a significant difference. This result indicates that a 20% decrease in N application rate is possible with XND without yield reduction and with savings in both labor and time.

Keywords

Rice; Yield; Fertilizer; Nitrogen use efficiency

Categories
Plants

Google Doodle about Jan Ingenhousz, Father of Photosynthesis

[fb_embed_post href=”https://www.facebook.com/petiole.co/photos/a.1504963533085771.1073741828.1478488995733225/1941882772727176/?type=3&theater/” width=”550″/]

Categories
Plants

Agri-tech map in Ukraine – Petiole is there

[fb_embed_post href=”https://www.facebook.com/petiole.co/photos/a.1504963533085771.1073741828.1478488995733225/1929624907286296/?type=3&theater/” width=”550″/]

Categories
Plants

Effect of Brassinolide in amelioration of salinity adverse effects on growth and yield of wheat

[pdf-embedder url=”http://darkgreensingularity.com/wp-content/uploads/2017/10/6-3-42-316.pdf”]

Categories
Plants

A simple and accurate model for the non-destructive estimation of leaf areas in genotypes of Plumeria rubra L.

Plumeria Rubra / Wikipedia
Plumeria Rubra / Wikipedia

Leaf area (LA) is an important parameter in many plant modeling studies.There is a need for a simple, accurate and non-destructive model to predict LA in physiological experiments in which destructive LA sampling is not allowed (e.g., rare plants or genetically segregating populations). In this study, a model for LA estimation was developed for Plumeria rubra L. using simple linear measurements of leaf length (L) and maximum width (W). Two experiments were carried out, one in 2012 (on seven commercial genotypes: ‘California Sunset’, ‘Christina’, ‘Elsie’, ‘Gina’, ‘J.J. Mini White’, ‘Panittas Red’, and ‘Pixie Dust’) and one in 2013 (on one genotype ‘Divine’) under greenhouse conditions, to test whether a model could be developed to estimate LAs of P. rubra across genotypes. Regression analysis of LA vs. L and/or W revealed several models that could be used to estimate the area of individual Plumeria leaves.To develop a model to estimate individual LA values accurately for all genotypes of P. rubra, measurements of both L and W should be included. The proposed linear model [LA = 4.15 _ 0.66 (L _ W)] was adopted for its accuracy, highest R2 value (> 0.96), smallest mean square error (MSE), and smallest predicted residual error in the sum of squares (PRESS), and whose PRESS value was close to the sum of squares for error (SSE). Validation of the model using L _W measurements of leaves was carried out on an independent dataset derived from another genotype (‘Divine’) in 2013. Correlation coefficients showed that there were strong relationships between predicted LAs and observed LAs, with an over-estimation of 4.0% in the prediction. This model can therefore be adopted reliably to estimate LAs in P. rubra, non-destructively.