Par/ppfd

[Yuri Barros]

After make a search...........I´m not able to found a thread about this issue............

So.........I decided to make a new thread...............

PAR is..........Photosynthetically Active Radiation..................

And PPFD is.............Photosynthetic Photon Flux Density : Flux of PAR photons per unit area.............

I have no idea about Banana Plant requeriment..............

As well as the implications of the excess..................of Light intensity..........

In the wild............here in Brazil.............wild Bananas.............kind of M. velutina...........or something like that.................lives in shaded grotos........

Where less PAR is measured than the full Sun........Banana Crops................

The leaves are wide open................and bright green color..............in shaded places................inside the forest................

And in the field of Banana Crops..............the leaves are retracted in most part of the day...............

Some one have an idea about the Optimum PAR/PPFD requeriments...........of the Banana tree...............???


Inside the Forst is better than in the full Sun..........???

[Hammocked Banana]

Not sure.....but.....do.....u......need......so...........many...... ..periods?????

[Yuri Barros]

This is an old vicious that I got..........from an old broken board............

I studied PAR measurements for Aquarium Corals needs.............

I know that have some studies related to plants.........

I was studing LED lights..............and I read some experiments...............with plants...............

And I was thinking that...........I can find an Optimum PAR measurement..............to potencialize the Banana growth.............

I don´t know if one can get better fruits in full Sunny area.............or in shaded places..............???

I know that there is a minimum PAR to start the Photosynthesis............and there is a point of Saturation (elevated PAR).............that stops the Photosynthesis.............

But I would like to find the "Sweet Spot"...............to promote the healthiest growth................

I don´t know...........???

[sunfish]

Banana Cultivation Guide « Banana Planters

[Yuri Barros]

These data...........extracted from the Text..........are very intresting :

"Growth begins at 18ºC, reaches optimal growth at 27ºC and stop entirely when temperature reaches 38ºC."

"Although Bananas grow best in bright sunlight, high temperature will scorch leaves and fruit."

"For best appearance and higher photosynthetic rate, wind protection is advisable"


These are achieved place the Banana Tree................"inside" the Forest...........under Tall Emergent Trees shade.................

Inside the Forests exists a microclimate.............very stable..............with no winds..............

Thank You for these infos.................

[bananimal]

I prefer dashes --------- instead ----------- to start a new sentence -------- picked this up from touch typing class at Rhodes --------- many moons ago.

[Nicolas Naranja]

Start here. Follow the relevant cited references for more information.

Brazilian Journal of Plant Physiology - Environmental physiology of the bananas (Musa spp.)

[Yuri Barros]

Wow.................fantastic Article................I have to study it...................deeply................

Thanks for share.......................

Here in Bazil...............in South Bahia..............ancient Cocoa Palntations used to presrve Emergent Trees to crate a micro environement to Cocoa..............

This Land management preserve lots of wild Life................and it was good for the Cocoa Crops.............

Now they are clearing the land to the Cattle......................

But I never see People preserving Emergent Trees............and mixing it with Banana Crops.................

That I think that is good for both..............Wild Life and Banana Trees............that will take the benefits of partially shaded environement.............as well as the improvement of the moisture...........no winds.................optimum temperatures..............

Or a mixed Crop with............Palms..........for exemple...........Oil Palm (Dendê)...........or Euterpe (Açaí)....................

I mean using.........and preserving the Emergent Trees of the Forest..............or using tall trees to promote this kind of micro environement that Banana Trees like..................

I don´t know.........???

There is a "Sweet Spot"............that I would like to find.............

No too much shaded..............no too much exposed to the Sun...........

I think that this kind of instrument.........(PAR Meter).......will help..............

Apogee Instruments Quantum Sensor - Measuring PPF

???


No too expensive............using in Reef Aquarium.............together with a Coral PAR requeriments list............

So...........you can measure.............different places in the tank...........and this help to fix the Coral much better.............

I mean.............less PAR...........you fix the species with less light requeriments..............like the bottom near the substrate............

Or........Corals that needs more light................you can fix them in the places with more intensity...............such near surface.............

This PAR Meter...............is used frequently now in Reef aquarium.........

I think that this may help...............to choose better places for the Bananas..........

According previous reserarch.........about light requeriments................

I don´t know...............I have to study this subject...................

[Nicolas Naranja]

The highest yielding bananas in the world are grown in the Canary Islands and they are grown under cover.

[Yuri Barros]

Intresting.........do you have a related link.........???

This is totally new to me.............

[sunfish]

I can say that the plants I grow in my greenhouse,with about 30% shade do better than outdoor plants in full sun.

[Yuri Barros]

I think that...............if one measure the Light Intensity with PAR Meter................the exact proportion of shade can be determined.......................

We can achieve the "Fine Tunning"....................of the amount of Light.................

That´s what I´m searching...................

Thanks...........for your usefull reply..................