Photos are on another site sorry, I'm sure Jay and Von have seen them too.
Yeah, thanks for a link....
Photos are on another site sorry, I'm sure Jay and Von have seen them too.
i have always wondered what would happen if you kept a perennial rootstock but grafted clones on after each grow.
Thanks so much my friend. This info is astounding and Dr. St. John is humorful while being exhaustively informative. Truly an expert resource for all farmers.download and read this.
http://www.saviskyproturf.com/28.html
a quick tip.... too much P has been known to inhibit the growth of mycorrhizae
Links: The effects of the fungus on the soil are even more significant
than its effects on the plants. As more and more plants become mycorrhizal,
the fungus links one root system to the next. This is possible
because the fungus can colonize almost any plant species. Experiments
have shown movement of soil nutrients and even photosynthate
between plants of different species, as the mycorrhizal fungi pass materials
back and forth. The early ecologists who spoke of the community
as a “super-organism” were not entirely wrong. Below ground,
the community is to some extent a super-organism with a single nutrient
uptake system. The active hyphae that make up the network are
by far the biggest component of the soil microbiota, and make the essential
difference between living soil and inert “dirt.”
The structure of the network is much more complex than this simple
picture. It includes not only a mixture of plant species, but a mixture
of mycorrhizal fungal species. Different fungi are most active in different
parts of the soil, they change seasonally, and to some extent
associate with preferred plant species.
FWIW: Why I don't suggest using AM fungi when growing Cannabis spp.:
I came to the conclusion, backed up by data, that soils with even moderate levels of *organic* P (~>0.5% P), can and will hinder AM fungi (especially important is the N/P ratio). Available organic minerals are of most concern and at the stated level can hinder or prevent AM fungi growth and reproduction. See the paper by David D. Douds, PhD, titled "On-farm Production and Utilization of AM Fungus Inoculum"[1].
I have also been researching time frame (days, weeks, months) for fractional and full infection % and values of various hosts roots by various AM species (mostly Glomus spp.). It seems full infection (~70-90%) occurs around and between the 5th to 10th weeks after inoculation of soil (or media) with live AM fungi inoculum propagules[2][3][4], not freeze dried spores which is what nearly every 'weed' grower uses :sad: ...
I have been researching those two topics (P quantity and infection time) in regards to use of AM fungi with Cannabis spp. cultivation. Almost every 'grower' uses AM not at their own fault, but at the falut of the industry hype. Even those who use chemical fertilizers tend to apply AM fungi! It turns out that over 32ppm of P (chemical) will almost totally inhibit AM fungi infections (value = 0)[1].
After much research I have come to the conclusion that the use of AM fungi when growing Cannabis spp. is not wise as it's merely a waste of money. The problem is two fold: (1) infection time frame considering the average cultivation time of Cannabis spp. (~2-3 months indoor; ~2-5 months outdoor) and (2) the usage of high levels of P (organic or chemical) which is necessary for intense Cannabis spp. cultivation. The former issue (1) is a problem if one uses freeze dried AM fungi spores as inoculum, not when using live AM fungi inoculum. The use of freeze dried AM fungi spores greatly slows the infection time frame, probably past the point of usefulness for Cannabis culture. The latter issue (2) is a problem because low levels of P, even with fully AM infected host roots, is most probably going to lower the Cannabis flower quality and yield.
Also of note is most AM fungi products (ie. freeze dried spores) are mixed with freeze dried Trichoderma spp. spores! This is not wise because the Trichoderma spp. will grow and reproduce much more quickly than the AM fungi spores, thus the Trichoderma spp. will parasite the AM fungi spores and hyphae. The AM fungi must first be in a mycorrhiza association and be thiving, then Trichorderma spp. could be introduced. However, in my opinion, it is redundant to use Trichoderma spp. AND AM fungi because the AM fungi can protect the “extraradical environment” (eg. soil around rhziosphere), the rhizosphere and host roots as well as, or better than Trichoderma spp.; besides, AM fungi offers so many other great benefits. There are some studies which found Trichoderma spp. to have a synergistic relationship with some AM fungi[5] and should be “...designated as mycorrhizal helper organism..."[6].
[1] “On-farm Production and Utilization of AM Fungus Inoculum”
Author(s): David D. Douds, PhD.
USDA-ARS Eastern Regional Research Center, June 16, 2009
[2] “Infection of Vesicular-Arbuscular Mycorrhizal Fungi to Plants and Spore Numbers in Cultivated Soils in Miyagi Prefecture”
Authoer(s): Kanehito Sansai
August, 31, 1992
[3] “Modeling arbuscular mycorrhizal infection: is % infection an appropriate variable?”
Author(s): Michael F. Allen
Mycorrhiza (2001) 10:255–258
[4] “Quantification of Active Vesicular-Arbuscular Mycorrhizal Infection Using Image Analysis and Other Techniques”
Author(s): S.E. Smith and S. Dickson
Department of Soil Science, Waite Agricultural Research Institute,
Glen Osmond, SA 5064, Australia.
Aust. J. Plant Physiol., 1991, IS, 637-48
[5] "Interactions between the arbuscular mycorrhizal fungus Glomus mosseae and plant growth-promoting fungi and their significance for enhancing plant growth and suppressing damping-off of cucumber"
by W.A. Chandaniea, M. Kubotab and M. Hyakumachi
[6] "Enhanced growth and nutrition of micropropagated Ficus benjamina to Glomus mosseae co-inoculated with Trichoderma harzianum and Bacillus coagulans"
by Jayanthi Srinath, D.J. Bagyaraj, and B.N. Satyanarayana