tailieunhanh - Báo cáo nghiên cứu khoa học: Strengthening Capacity in Forest Tree Seed Technologies Serving Research and Development Activities and ex-situ Conservation (MS4)

Rừng giống, các điều khoản và diện tích sản xuất giống, thường được gọi là "A đứng cộng thêm thường được nâng cấp và mở bằng cách loại bỏ cây không mong muốn và sau đó được nuôi để sản xuất giống sớm và phong phú". Hai thuật ngữ này thường được điều trị trong bối cảnh khác nhau. Ở một số nước, rừng giống 'đề cập đến một khu rừng trồng (trồng rừng) đã được chuyển đổi để sản xuất hạt giống, trong khi khu vực sản xuất giống là một khu vực đặc biệt trong rừng tự nhiên. | Ministry of Agriculture Rural Development Australian Government AusAID Strengthening Capacity in Forest Tree Seed Technologies Serving Research and Development Activities and ex-situ Conservation No. 058 04VIE Seed Production Areas MS4 Guidelines for Establishment and Management Practices by Khongsak Pinyopusarerk ensis Genetics the joint force of CSIRO and Scion Canberra Australia August 2005 1 Introduction The terms seed stand and seed production area are generally referred to as A plus stand that is generally upgraded and opened by removal of undesirable trees and then cultured for early and abundant seed production . These two terms are often treated in different context. In some countries the term seed stand refers to a planted forest plantation which has been converted to produce seed while seed production area is a special area in natural forest which is managed for seed production. In some countries however seed production area is a preferred term for planted forest or plantation which is managed for seed production. In this guideline seed production area is a seed-producing stand which has been developed either from existing planted stand or from stand specially planted and managed for seed production purpose. Organisations with extensive planting programs need large quantities of genetically-improved seed to increase yield and productivity. There are several methods that can be used to obtain genetically-improved seed for planting. A simple and relatively low-cost method to produce slightly-improved seed is development of Seed Production Areas. Seed production areas are stands specifically managed for seed production. They are often used as interim sources until a more advanced seed production program such as that from seed orchards has been established. They are a very effective way of making available seed supply of an inexpensive but somewhat improved genetic quality. Although the amount of genetic improvement from a seed production area is expected to