43 湖南省地方标准 ICS CCS 65.020 B 60 DB43/T2204—2021 发 布 湖南省市场监督管理局巨紫荆苗木繁育技术规程 Technical regulation on the seedling propagation of Cercis gigantea 2021-11发布-09 2022-01实施-09 DB43/T 2204—2021 I 目 次 前言 ································ ································ ································ ································ ······················· Ⅲ 1 范围 ································ ································ ································ ································ ··················· 1 2 规范性引用文件 ································ ································ ································ ································ 1 3 术语与定义 ································ ································ ································ ································ ········ 1 4 实生苗培育 ································ ································ ································ ································ ········ 2 5 扦插苗培育 ································ ································ ································ ································ ········ 3 6 嫁接苗培育 ································ ································ ································ ································ ········ 4 7 苗木分级 ································ ································ ································ ································ ············ 5 8 出圃 ································ ································ ································ ································ ··················· 5 9 质量检测 ································ ································ ································ ································ ············ 5 10 苗圃技术档案 ································ ································ ································ ································ ·· 6 DB43/T 2204—2021 II DB43/T 2204—2021 III 前 言 本文件按照 GB/T 1.1 —2020《标准化工作导则 第1部分：标准化文件的结构和起草规则》的规 定起草。 请注意本文件的某些内容可能涉及专利 。本文件的发布机构不承担识别这些专利的责任。 本文件由湖南省林业局提出。 本文件由湖南省林业标 准化技术委员会归口。 本文件起草单位： 湘西州土家族苗族自治州林业综合服务中心、 永顺县巨紫荆花卉苗木专业合作社、 湖南省林业科学院、湘西高新技术产业开发区不动产登记中心、湖南省青羊湖国有林场、湘西土家族苗 族自治州营林管理站 本文件主要起草人：和红晓、杨艳、仝奇峰、易烜、翟军、黄斌、刘年元、廖文斌、滕方玲、张慧、 陈晨甜、梁召娣。 DB43/T 2204—2021 IV DB43/T 2204—2021 1 巨紫荆苗木繁殖技术规程 1 范围 本文件规定了巨紫荆苗木繁育的实生苗培育、扦插苗培育、嫁接苗培育、苗木分级、出圃、质量检 测、苗圃技术档案等技术要求。 本文件适用于巨紫荆的 苗木繁育。 2 规范性引用文件 下列文件中的内容通过文中的规范性引用而构成本文件必不可少的条款。 其中， 注日期的引用文件， 仅该日期对应的版本适用于本文件；不注日期的引用文件，其最新版本（包括所有的修改单）适用于本 文件。 GB 6000 主要造林树种苗木质量分级 GB/T 6001 育苗技术规程 LY/T 2289 林木种苗生产经营档案 LY/T 2290 林木种苗标签 3 术语与定义 下列术语和定义适用于本文件。 3.1 巨紫荆 Cercis gigantea Cheng et Keng f . 巨紫荆为豆科（ Leguminosae ）紫荆属（ Cercis）中国特有植物。 3.2 头木作业 pollard method 从树冠以下某高度伐去树冠，留下一段 1 m～4 m的树干，让其切口萌发枝条，然后每年或定期采 伐利用萌条，此处逐年增大成瘤状，形似人头，加之伐桩较高，故称头木作业。 4 实生苗培育 4.1 种子采集及处理 4.1.1 种子采集 10月～11月采集充分成熟荚果。 4.1.2 种子处理 将荚果散置室内通风处阴干 20 d，用木锤击打取种，然后依次用风选、水选净种，再用 90％敌百 虫1000倍液或80％敌敌畏乳油 800倍液喷洒种子，晾干后装入透气的布袋中置于阴凉通风处。 DB43/T 2204—2021 2 4.2 圃地 4.2.1 选择 交通方便、便于灌溉且不积水的向阳地块，土层深厚肥沃、微酸性壤土或轻砂质壤土。 4.2.2 整理 4.2.2.1 整地 入冬前深耕 20 cm～30 cm，翌年3月上旬锄碎耙平，按 100kg／667 m²复合肥作基肥或腐熟农家肥 均匀散施在圃地上翻耕拌匀。 4.2.2.2 作床 苗床方向根据地形而定，床宽 100 cm～120 cm、高20 cm～30 cm，床面土碎平整，苗床间沟宽 30 cm左右，环形沟与苗床间沟同宽略深。 4.2.3 土壤处理 用多菌灵和敌杀死对苗床进行灭菌杀虫处理。 4.3 播种 4.3.1 贮藏与催芽 将种子放入 65 ℃～70 ℃水中浸泡 72 h后，转入 0.5％的KMn0 4溶液浸泡 10 min～15 min，捞出 晾干，按沙种 8:2比例拌匀覆盖薄膜，贮藏至 50％以上种子露白，贮藏期间翻动 2次。 4.3.2 时间与方法 3月中下旬至 4月上旬。播种前苗床浇透水，将露白后的种子按 1.5 kg～2 kg/ 666.7m2条播于苗 床上，条播沟间距 30 cm～35 cm，沟深3 cm，上覆火培细土或育苗基质，厚度以不见种子为宜，再用 塑料薄膜覆盖，当 20％～30％以上种子发芽出土时，于早晚及时去除薄膜。 4.4 芽苗移栽 4.4.1 圃地整理 参照4.2.2执行。 4.4.2 时间 芽苗长至 2片真叶时移栽。 4.4.3 方法 阴雨天或早晚，用竹签将苗下端轻轻挑起，按株行距（ 2～4）cm×（30～35）cm移至圃地。 4.5 定苗 4.5.1 方法 苗高10 cm～15 cm时定苗，留苗 20000株/666.7 m2左右。每隔 10 d～15 d，选择无风晴天用等