吊丝球竹DD-1选育与推广研究

吊丝球竹DD-1是大渡河造林局近年选育的省级良种,通过吊丝球竹DD-1与原种吊丝球竹（Bam busabeecheyana）的分类学的差异分析、抗寒性等研究,结果表明：对低温的耐受性,与慈竹相当,明显优于杂交竹,可耐受-1.1℃以下的低温;吊丝球竹DD-1抗干旱性较强,在川中旱区种植成活率高于当地慈竹45.7个百分点;耐盐碱性尤为突出,在pH5.5~7.8均能正常生长,在pH值7.0~7.8的立地条件表现优异;在相同立地条件下,其生物量大大高于慈竹,DD-1单株平均重量20.1 kg,慈竹单株重量2.4 kg,DD-1重量是慈竹的8.37倍;比较与慈竹等4种竹子制浆抄纸性能,粗浆细浆出浆率综合评定优于慈竹,属于优良的造纸竹材;经营模式研究表明,DD-1栽植第4年,笋、材两项公顷平均收入可达34 500元~46 500元;综合研究表明：四川1 000 m海拨以下的山区可广泛种植。

Studies of Breeding and Popularizing of Bambusa beecheyana DD-1

Bambusa beecheyana Munro DD-1 is a provincial excellent breed selected by Dadu River Afforestation Bureau in recent years.Through the research on the analysis of differences and cold resistance between B.beecheyana DD-1 and the stock seed B.beecheyana,the results have indicated that the cold resistance is equivalent to Neosinocalamus affinis,and much better than hybrid bamboo,able to withstand the temperature below-1.1℃;B.beecheyana DD-1 is relatively strong in drought resistance,and its survival ratio in drought regions of middle Sichuan is 45.7 percentage points higher than the local Neosinocalamus affinis;Saline-alkali resistance is a distinguished strong point.It grows normally in the site condition with pH5.5～7.8,while it also grows well in the site condition with pH7.0～7.8;under the same site condition,its living weight is much more than Neosinocalamus affinis,a single DD-1 average weighs 20.1 kilograms,while a single Neosinocalamus affinis only weighs 2.4 kilograms,DD-1 is 8.37 times heavier than Neosinocalamus affinis;compared with Neosinoclamus affinis and other 3 kinds of bamboo in the ability of pulping and papermaking,the yield of its pulp is better than Neosinocalamus affinis in comprehensive assessment,it is a breed of excellent paper-making bamboo;Research on the management mode indicated that,in the fourth year of planting DD-1,the average hectare income of bamboo shoot and bamboo wood reached 34 500~46 500 Yuan;Comprehensive studies have clearly shown that it can be widely planted in areas below an altitude of 1,000 meters in Sichuan.