tailieunhanh - Báo cáo nghiên cứu khoa học " ACACIA PLANTATIONS FOR SAWLOG PRODUCTION: SOME SIVILCULTURAL MEASURES AND RECOMMENDED SUITABLE AND PROFITABLE ACACIA SPECIES "

Các nghiên cứu về phản ứng pha loãng để tăng trưởng đường kính, cắt tỉa phản ứng để đăng nhập khuyết tật và ứng phó phốt pho (P) của sự phát triển keo lai ở Quảng Bình và Quảng Trị cho thấy: (1) mỏng phương pháp tăng tốc độ tăng trưởng đường kính của cây keo lai, (2) cắt tỉa giảm các khuyết tật đăng nhập của keo lai (3) thụ tinh 10 g phốt pho nguyên tố (như 143 g supe lân / cây) trồng thời gian là đủ để tăng chiều cao phát triển của cây keo lai ở giai đoạn sớm. | Collaboration for Agriculture and Rural Development CARD Program ACACIA PLANTATIONS FOR SAWLOG PRODUCTION SOME SIVILCULTURAL MEASURES AND RECOMMENDED SUITABLE AND PROFITABLE ACACIA SPECIES Project title Sustainable and profitable development of acacia plantations for sawlog production in Vietnam Project code CARD 032 05 VIE Authors Phi Hong Hai1 Chris Harwood2 Chris Beadle2 Sadanandan Nambiar2 Khongsak Pinyopusarerk2 Vu Dinh Huong3 Dang Thinh Trieu4 Pham Xuan Dinh5 Trieu Thai Hung5 Project Implementing organisations 1 Research Centre for Forest Tree Improvement - FSIV 2 CSIRO - Sustainable Ecosystems Private Bag 12 Hobart 7001 Australia 3 Sub-Institute of Forestry Research in the South - FSIV 4 Silvicultural Technical Division - FSIV 5 Center for Forestry Science and production in Northern Central regions - FSIV Responsible author SUMMARY Studies on thinning response to diameter growth pruning response to log defects and response to phosphorus P of acacia hybrid growth in Quang Binh and Quang Tri showed that 1 thinning method increased diameter growth of acacia hybrids 2 pruning decreased log defects of acacia hybrids 3 fertilisation of 10 g of elemental phosphorus as 143 g superphosphate tree at planting time was sufficient for increasing of height grow of acacia hybrids at early stage in Quang Tri. In sawn timber plantations Acacia mangium A. auriculiformis A. crassicarpa and Acacia hybrids A. mangium x A. auriculiformis were proved to be suitable species. A. crassicrapa was a promising species and performed well in inland sands in the central Vietnam. A. mangium was a suitable species in lowland in the northern Vietnam. While A. auriculiformis was preferred planting in the southern Vietnam. Acacia hybrids could be planted in many sites from the North to the South. National clones and technological advanced clones that approved by Ministry of Agriculture and Rural Development were suggested for using in commercial plantations of A. .