Hello everybody. I made six piles of Bokashi organic fertilizer through an aerobic fermentation process with the following recipe:
for 100 kg of bokashi:
Mature manure 40kg
Soil 40kg
Wheat Middlings 20kg
Yoghurt 1kg
Beet Molasses 20g
Yeast 20g
Water 25 L
Three of the six had also phosphate rock 10kg
Mixed everything and let ferment for a week, mixing it up everyday.
When it was finished I took samples and sent to laboratory for analysis.
Now I run Infostat software for an ANOVA with fischer test (0.05 significance) and it shows that there are significant differences of Organic Matter (MO) and Organic Carbon (CO) between phosphate rock treatments (Con RF) and ones without (Sin RF).
I attached the info.
Could anyone help me with information about this ?
Hi Vicente,
I can think about two reasons.
One is the dilution factor. I don't know if you are talking about concentrations or about total content, but since you are adding 10 kg more in RF than in NO-RF, the concentration of your organic matter might be affected.
The other one is the one that I think is more likely. As you might know, P is usually a limiting factor for plant growth, but it can also be the same regarding the microbial reproduction in your tank (you are also adding other micronutrients present in your RF together with your P). Since your microbes in the treatments where you added RF have more P available, they could have reproduced more and thus, you could find more organic matter in your bokashi.
Un saludo,
Iñaki.
Hi Vicente,
Inaki is correct. One possible reason is the dilution factor.
Other possibilities are:
(1) Loss of C as CO2 emissions (and possibly CH4 emissions, if the composting mixture developed anaerobic conditions between mixing times);
(2) Loss of C as leachate (this should have been visually noticed during the composting process). If you did not notice leachate loss, it can be excluded. Then, I suspect loss of C in gaseous forms. More gaseous C losses from one treatment than the other.
Susantha.
Thank you all, and yes, I was thinkng on the dilution factor also.. my no RF treatments were 100kg while the others were 110kg
Thank you very much Hani. I deleted the units for running the ANOVA in the infostat software with no problem. organic matter, organic carbon, total nitrogen are % unit. other nutrient measures are ppm or mg/kg.
My phosphate rock is 30.5% P and 40% Ca, so thats why there is a huge difference between treatments about Ca. But what is curious is that PR treatments, 2 of them show higher P content than no PR treatments, not vey much higher I think because it is at 10%, but one PR treat shows like the half of the no PR treatments. Could it be an outlier ?
Regards
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