Über Technik und Organisation der Waldpflanzennachzucht

Notes on Nursery Technique and Organisation

Birmensdorf

1957

S. 97-123

6 Lit. Ang.

Bandaufführung

1265

157664

In the past years the demand for forest.plants has increased t a atriking rate and evidently the develpoment will continue in the future. The greater need is due to intensifies silvacultural treatments, first afforestation and restockings of areas devastated by catastrophes. the method of supply with forest-plants in use so fae are no longer sufficient for this demand. The organisation was inadequate and the methods of reproduction were often out of date and therefore inefficient, The situation has been changed by modifications within the forest-service, by altered labour-market and by improved methods of reproduction. All these considerations to-day call for a reorganisation of the supply system for forest plants. At present the situation of herediy for forest.trees is pretty well known through research in forest genetics. This knowledge must be taken into account by gathering seed on selected trees and sites as wel as by planting on corresponding sits. To-day these demands can be net economically by improving the technique of gathering. Formerly the critical stage of regeneration, he seeding, always included risks ans uncertain results. By creating optimum environmental conditions artificially, the wanted results can now be abtained within narrow limits and at economically acceptable expenses. The essential measures to be taken are: soil improvement,, shading, irrigation and sufficient spacing, provided of course the the climatic locations of the nurseries are favorable. Direct seeding requires permanent care and supervision by a trained staff. Transplanted stok requires less care; results are satisfactory if the soil ist periodically well worked and if sufficient spacing is observed. The methods of working the soil developed in recent years demand considerable less time and tools than the weedcontrol in use so far. They furthermore comprise additional operations which are very important for plant growth.