Re: Savorys Aussagen werden nicht von der Wissenschaft gestu
Verfasst: Fr 23. Aug 2019, 22:56
Lasst den Wald in Ruhe! Gefühlsmässig und ethisch! Dafür braucht es keine Zahlen ...
Das Forum für Selbstversorgung und Permakultur
https://selbstvers.org/forum/
Cattle that grazed according to Savory’s method needed expensive supplemental feed, became stressed and fatigued, and lost enough weight to compromise the profitability of their meat.
Ich kann weder nachkontrollieren, ob es stimmt, dass es so ist, wie Savory behauptet - noch kann ich kontrollieren, ob obiger Text stimmt.Further weakening Savory’s argument for the wholesale application of holistic management to the world’s deserts is his distorted view of desert ecology. There are two basic kinds of deserts: genuinely degraded landscapes in need of revival and ecologically thriving ones best left alone. Proof that Savory fails to grasp this basic distinction comes when, during his talk, he calls desert algae crust (aka “cryptobiotic crust”) a “cancer of desertification” that represses grasses and precipitate runoff. The thing is desert algae crust, as desert ecologists will attest, is no cancer. Instead, it’s the lush hallmark of what Ralph Maughan, director of the Western Watersheds Project, calls “a complete and ancient ecosystem.” According to the U.S. Geological Survey, “Crusts generally cover all soil spaces not occupied by green plants. In many areas, they comprise over 70 percent of the living ground cover and are key in reducing erosion, increasing water retention, and increasing soil fertility.” Savory, whose idea of a healthy ecosystem is one with plenty of grass to feed cattle, neglects the less obvious flora—such as, in addition to algae crust, blackbrush, agaves, and creosote—that cattle tend to trample, thereby reducing the desert’s natural ability to sequester carbon on its own terms. “It is very important,” Maughan writes, “that this carbon storage not be squandered trying to produce livestock.”
usw.Why The Slate Article About Allan Savory Is Dead Wrong
The main push of James’s article is that there is no evidence to support Allan Savory’s claims and that there is actually evidence discrediting Savory’s claims. Both of these assertions are “dead wrong”.
This issue is very important to me, so I am going to examine James’s article point by point. Here we go...
...But the point James is making here seems to be that proving something works on 6,200 acres is not good enough to prove that it works all around the world. A valid point.
But there is a huge problem with this argument: Holistic Planned Grazing is currently being used on over 40 million acres worldwide. It is not just a theory based on a single trial done decades ago. It is being used by thousands of producers all over the world with great success:
…
Warum wäre das eine gute Sache? Die Behauptung stammt von Dir und was dann folgt, hat absolut nichts mit Savory oder HM zu tun. Konstruiert, um zu diffamieren. Es gibt genug Land, dass eine bessere Behandlung bitter nötig hätte, niemand ausser den kriminellen Brandrodern und Holzschlaegern will intakten Regenwald vernichten.DieterB hat geschrieben:Wenn Savory recht haette, waere es eine gute Sache den Amazonas Regenwald abzubrennen, um Viehweiden anzulegen.
"...There are two points worth addressing here. First James asserts that the hard “crust” on desert soils is preferable to the grassland that could exist otherwise. Then he asserts that “the desert’s natural ability to squester carbon” is more important than what can be achieved with livestock.
The Value Of Desert Algae Crusts Versus Grassland
No scientist can tell us whether a algal crust is more valuable than a grassland. It depends on what we value most. Here are some reasons that replacing “cryptobiotic crusts” with grassland might be a very good idea:
Grasslands sequester carbon in the soil, reducing global GHG levels. (reference) Algal crusts do not increase the carbon stored in soil and store less carbon in their biomass than grassland.
Grasslands produce food for humans, as well as for wildlife. Algal crusts do not.
Air temperatures fluctuate more dramatically over a crusted surface than over a grassland. Over a large enough scale this effects regional air temperatures. (hotter summers and colder winters)
Algal crusts do not permit most new seeds to grow. Seeds which fall on to the surface of a crust are excluded from the nutrients and moisture of the soil, which they require for growth. Over time, a lack of seedling growth leads to loss of plant life.
Grasslands contain more biodiversity than areas dominated by cryptobiotic crusts (in terms of number of species). Biodiversity is essential for ecosystem resilience and stability.
Algae crusts do not permit the infiltration of rainfall into the soil, whereas grassland soils absorb rainwater readily. (reference)
Rain that does not infiltrate the soil travels over the surface: causing erosion and flooding downstream.
Rain that falls on an area with algal crusts is not stored in the soils of those areas, depriving the ecosystem of life-giving water reservoirs."
ja schade eigentlich das das Thema nicht in diesem Faden geblieben ist, so sind einige schon ausgetauschte Meinungen und Ansichten wieder verschüttet obwohl sie wichtig waren.WTF?! hat geschrieben:...Ina, der richtige Faden: "Ich traue dem ganzen nicht" ...
die weiden stehen untrennbar in beziehung mit der weltRati hat geschrieben: Keiner hier bestreitet das hm ne sehr gute Sache ist um Weideland zu verwalten.
Aber die Welt ist nun mal keine Weide.
na auf jeden Fall ist das so. Weideland (als Kulturfläche)oder eben die Savanne(als natürliche Fläche) sind ja Teil des Ganzen.kraut_ruebe hat geschrieben:die weiden stehen untrennbar in beziehung mit der welt
vielen Dank für das liebe Angebot, aber ehrlich... keine Ahnung... die Natur eines freien Forums ist nun mal zu wuchern mit Ranken, Dornen und wunderhübschen Blüten.kraut_ruebe hat geschrieben: kann ich es euch von moderatorenseite aus irgendwie leichter machen den zu nutzen? zb. umbenennen? die savanne als eigenes thema raustrennen? oder...?
( https://en.wikipedia.org/wiki/Biological_soil_crust )The presence of biological soil crust cover can differentially inhibit or facilitate plant seed catchment and germination. The increased micro-topography generally increases the probability that plant seeds will be caught on the soil surface and not blown away. Differences in water infiltration and soil moisture also contribute to differential germination depending on the plant species. It has been shown that while some native desert plant species have seeds with self-burial mechanisms can establish readily in crusted areas, many exotic invasive plants do not. Therefore, the presence of biological soil crusts may slow the establishment of invasive plant species such as cheatgrass (Bromus tectorum).[10]