Hello everyone! I am trying to grow rice in pots inside a growth chamber for the past 4 months in Arkansas, USA. All I am getting is the plant becomes yellow and slowly dies. In some, browning starts from the leaf tips and then progresses slowly and the plant dies completely. I have increased the dose of urea after chlorosis begins but it is not working. I applied ferrous sulphate (2%) to see if it is due to iron deficiency. Still, the result is same. My growing condition is 30 degree celsius day temperature for 16 hours followed by 26 degree celsius night temperature. Algae growth is seen on the soil surface but I dont think that can kill the plant completely. I am using topsoil and sungro mix soiless mix. I have tried with all possible combination and still the result is same. I inoculate the seeds in media after sterilization. Then I transfer them to peat pellets for hardening and then into pots. Please help. Attached are some images.
I guess you keep rice in pots with holes on the bottom. Rice likes to be flooded and you should follow a practice for porch plants then move to growth chambers experiments. Solar radiation requirement is high and not all chambers allow it, http://www.heirloom-organics.com/guide/va/guidetogrowingrice.html
Dear Poudel,
What I see in you pic is that, it is the problem of root anoxia, i.e., depletion of oxygen from rhizosphere, rather than nutrient deficiency. You might have observed rotten roots from the dead plants.
You should check the pH of soil. You may add some sand or quartz grit to enhance the porosity of soil for proper aeration rather than adding excess fertilizer. Make a hole in the pot, but try to maintain flooded condition as said by Dr. Bongi. > 60% relative humidity should be maintained.
Good luck for your research.
Dear researcher
You can visit the site can help you solve your problem:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4842969/pdf/srep24941.pdf
Good luck
Algae would only grow that thick if you're overwatering the pots. I would recommend trying the sungro soiless mix by itself without the soil amendment. That should allow better drainage, which can help your problem. I have definitely seen algae smother out young seedlings under high irrigation conditions with similar symptoms.
Good luck on your research.
It seems to be due to Cu deficiency.Suppliment the media with Cu salt and then observe.
Thank you everyone for your answers.
Hello Mr. Bongi! Yes the pots are with holes. As you said, I have maintained flooded condition. I will be sure to try with more light as for radiation issue.
Hello Mr. Akhtar! I assumed the same initially but there is not rotting of roots as you suspected though the roots were yellow. I even experimented with alternate drying of tray i.e. no application of water for 3 days once applied to a flooding level. I am also disturbing the algae on the top of soil. So I am hoping I can reduce the algae level in plant.
Hello Mr. Al mayami! We dont have any phosphite mediated products in the market.
Hello Mr. Sherwood! I tried with sungro soiless mix as well and got the same result. In addition, I read an article on growing rice and it recommended 3:1 ratio of soil to soiless mix. Attached is the link to the protocol as per which I tried a lot of combinations.
Hello Mr. Saran! I will be sure to try that.
http://agron-www.agron.iastate.edu/ptf/protocol/Rice%20GC%20soilless%20mix%20protocol.pdf
Perhaps they need more fresh air, possibly indicated by the algae in the pots. I grew the Potamophila (wild rice) seedlings in a shade house quite easily. They didn't require much fertiliser since they grow naturally in the river and wouldn't get much nutrients there. I am trying to recall if I had the pots in the shade house sitting in saucers with water in them.
Hello Mr. Bikram Poudel I am also growing rice in pot in heavy metal contaminated soil. the soil is sandy. Now I am getting same symptom in rice seedling as in your case. If you got any solution, kindly communicate me as soon as possible. Other wise you can send me your answer through my mail:[email protected]
Likely that the soil in the pot has turned very hard and compact.
If possible try to transplant them into a new pot provided the soil is nicely puddled. To take care of any nutrient deficiencies irrigate with Yoshida medium at intervals.
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