tailieunhanh - Báo cáo khoa học: "Effect of desiccation during cold storage on planting stock quality and field performance in forest species"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: Effect of desiccation during cold storage on planting stock quality and field performance in forest species. | 101 Ann. For. Sci. 57 2000 101-111 INRA EDP Sciences Original article Effect of desiccation during cold storage on planting stock quality and field performance in forest species Didier Garrioua b Sabine Girardc d Jean-Marc Guehld and Benoit Généréa a Division Ressources Génétiques et Plants Forestiers Cemagref domaine des Barres 45290 Nogent sur Vernisson France b Institut Jules Guyot Université de Dijon Campus Montmuzard BP. 138 21004 Dijon France c Institut pour le Développement Forestier 23 avenue Bosquet 75007 Paris France d Équipe Bioclimatologie et Écophysiologie Forestière Centre INRA de Nancy 54280 Champenoux France Received 17 May 1999 accepted 10 November 1999 Abstract - Seedlings of pedunculate oak Quercus robur L. northern red oak Quercus rubra L. and Corsican pine Pinus nigra ssp laricio var Corsicana were lifted on November 18 January 27 and March 10. They were cold stored for 0 2 or 4 weeks in desiccating conditions gunny bags C 87 RH . An additional treatment consisted in a cold storage for 4 weeks in sealed polythene bags. Root growth potential RGP fine root electrolyte leakage REL and seedling water status variables were measured. Simultaneously seedlings were outplanted. The seedlings lifted in November exhibited lower survival and RGP except in pine than those lifted in January and March. Cold storage for four weeks in sealed polythene bags did alter water status variables in none of the species but decreased pine survival. Storage in gunny bags led to a desiccation in all plant components but in pine buds. In pine RGP and survival after outplanting decreased with desiccation duration. In oaks and namely pedunculate oak desiccation lowered RGP survival and growth after outplanting. In oaks poor field survival and shoot dieback were associated with low fine root water content measured at the time of planting and with low RGP. No satisfactory predictor of field survival or growth was found in pine. seedling quality lifting date desiccation .