齿瓣石斛品种'龙绿'的选育与栽培技术OA

This paper systematically introduced the breeding process,main characteristics and key propagation and cultivation techniques of the clonal cultivar'Longlyu'of Dendrobium devonianum.In terms of breeding,an excellent individual plant was found in a seedling cultivation field of Dendrobium devonianum in 2015.Clonal seedlings were obtained through cutting propagation from 2016 to 2018.The seedlings were transplanted in July 2018,and field tests for distinctness,uniformity and stability were conducted in Longshan Town,Longling County.Phenological periods,stem traits and other characteristics were compared and analyzed from 2023 to 2024.Finally,the clonal cultivar'Longlyu'with prominent novelty and distinctness as well as favorable uniformity and stability was selected,with the registration number Yunlinyuanzhi Xindeng No.20250030.In terms of main characteristics,this cultivar was an epiphytic herb.Its botanical traits such as plant type,stem diameter and leaf shape differed significantly from those of'Longzi No.1'and'Liangjie'.It yielded fresh stems at 3.9 kg/m²,contained 54.1%polysaccharides and 8.9%crude fiber,and showed excellent economic traits.It grew vigorously with outstanding advantages in vegetative growth,and its main phenological periods were basically consistent with those of'Longzi No.1'.In terms of cultivation techniques,this cultivar was suitable for growing in the cool subtropical regions of the Yunnan-Guizhou plateau at an altitude of 1 300-1 700 m.It was mainly propagated by cuttings:robust fresh stems were collected,disinfected and stored from November to December,and budded stem segments were cut for seedling raising in March to April of the following year.A simulated wild bed-cultivation mode with simple facilities was adopted.Transplanting was carried out in March to April at a seedling spacing of 10-15 cm.Water and fertilizer management included applying organic fertilizer before sprouting and topdressing farmyard manure during the growing season.Control measures were implemented against leaf spot,root rot and snails.Harvesting was performed from November to December when leaves fell naturally and leaf sheaths turned silvery gray.This paper provides references for variety optimization and large-scale cultivation in the Dendrobium devonianum industry.