Here is a link that might be useful: farmers and floers
It's been done in some parts of Europe for a long time, growing tall Fruittrees scattered around in meadows, in German it's called Streuwiese, see link.
A Google translation...
ÃÂ»Scattered fruit trees is a form of fruit crops, in which environmentally sound management methods fruit is produced on tall tree forms. The trees are in contrast to low-born plantation orchards often "scattered" in the landscape. Common meadow orchards is the regular use of both the standard fruit trees (top use) as well as the areas under the trees (lower usage). The sustainable use of orchard stock excludes the use of synthetic treatment agents such as pesticides and fertilizers. [...]
For the Central European biodiversity of fruit trees play a prominent role with more than 5,000 animal and plant species and over 3,000 varieties of fruit. Character types are Little Owl, Wryneck and Green Woodpecker. "
"In meadow orchards four times more species of breeding birds and five times more breeding pairs occur as in low-strain systems the so-called" integrated production ". This is the result of several years research on Lake Constance. The proven biomass of insects and arachnids even had almost eight times the weight. "
Source: NABU Germany, www.streuobst.de
These findings clearly show that native orchards are a very important tool of nature conservation. We therefore encourage you to maintain your existing orchards to access for new plantings on local, long-stemmed varieties of fruit trees and to pay particular attention to products from local orchards growing on your shopping. In order to not only make an important contribution to maintaining the diversity of our nature but also receive particularly good and healthy food.
Here is a link that might be useful: Streuwiese
This is fine as long as there are no commercial orchards in the area. Most commercial growing areas have a pest control district that requires the control of insects and diseases.
Of interest may be the publication, Perennial Plant List to Increase Biodiversity (beneficial insects) in Area Vineyards by Thomas J Darnell. You can find it via Google.