北海道の道路緑化に関する技術資料（案）改訂版

第１章

目次

北海道の道路緑化に用いる樹種

1.1 樹種の基本構成 ................................................................................................................................... 1-1
1.1.1 植生 .............................................................................................................................................. 1-21.1.2 樹種の基本的性状 ................................................................................................................. 1-41.2 樹種選定の考え方 .............................................................................................................................. 1-6
1.2.1 道路緑化での樹種選定の進め方 ..................................................................................... 1-61.2.2 道内における樹木の地域適応性 ...................................................................................... 1-91.2.3 北海道の自生種 ...................................................................................................................... 1-13
1.2.4 環境ストレスに対する抵抗性 .............................................................................................. 1-15
1.2.5 樹種選定に考慮すべきその他の要因 ............................................................................ 1-17
【用語説明】 ..................................................................................................................................................... 1-19第２章

樹木導入手法2.1 樹木導入手法の基本 ......................................................................................................................... 2-1
2.2 完成木植栽 ............................................................................................................................................ 2-2
2.3 半完成木植栽 .......................................................................................................................................... 2-2
2.4 苗木植栽 .................................................................................................................................................... 2-3
2.5 埋枝（挿し木） ............................................................................................................................................ 2-4
2.6 稚樹移植 .................................................................................................................................................... 2-4
2.7 伐株移植 .................................................................................................................................................... 2-52.8 天然更新 .................................................................................................................................................... 2-6
2.9 播種 .............................................................................................................................................................. 2-6【用語説明】 ..................................................................................................................................................... 2-10

第３章

植栽の設計

3.1 植栽の設計 ............................................................................................................................................. 3-1
3.2 植栽配置の検討 ................................................................................................................................... 3-2
3.2.1 歩道の植栽 .................................................................................................................................. 3-2
3.2.2 中央分離帯および交通島の植栽 ....................................................................................... 3-9
3.2.3 中央分離帯および交通島の植栽形式 ............................................................................. 3-10
3.2.4 環境施設帯の植栽 ................................................................................................................... 3-143.2.5 路傍（沿道）の植栽 ................................................................................................................... 3-193.2.6 その他の植栽 .............................................................................................................................. 3-23
3.3 設計時の作業内容 .............................................................................................................................. 3-25
3.4 生育基盤調査及び生育基盤整備の検討 ................................................................................. 3-26

3.4.1 生育基盤調査 ............................................................................................................................ 3-26
3.4.2 生育基盤整備の検討 .............................................................................................................. 3-31
3.5 樹木保護工（支柱） ............................................................................................................................. 3-423.6 設計の成果 ............................................................................................................................................. 3-48

第４章

樹木の植栽

4.1 樹木植栽の基本 ...................................................................................................................................... 4-1
4.1.1 樹木植栽の基本 ..................................................................................................................... 4-1
4.1.2 樹木の生産地 ............................................................................................................................. 4-2
4.1.3 樹木の検収 .................................................................................................................................. 4-3
4.1.4 植栽の時期 .................................................................................................................................. 4-144.1.5 植栽方法 ...................................................................................................................................... 4-194.2 支柱 .............................................................................................................................................................. 4-31
4.2.1 支柱設置の目的と設置の基本的な考え方 .................................................................... 4-31
4.2.2 支柱の施工 .................................................................................................................................. 4-32
4.2.3 支柱の材料 .................................................................................................................................. 4-33
4.3 保護養生 .................................................................................................................................................... 4-42
4.3.1 潅水 ................................................................................................................................................ 4-42
4.3.2 蒸散抑制 ...................................................................................................................................... 4-42
4.3.3 樹幹保護 ...................................................................................................................................... 4-42
4.3.4 冬囲い ............................................................................................................................................ 4-42
4.3.5 マルチング .................................................................................................................................... 4-42
4.4 施工管理 ................................................................................................................................................. 4-44
4.4.1 植樹保険 ...................................................................................................................................... 4-44
4.5 草花植栽工 ............................................................................................................................................ 4-46
4.5.1 ツル類植栽工 ............................................................................................................................... 4-46
4.5.2 グランドカバー植栽工 ................................................................................................................ 4-50
【用語説明】 ..................................................................................................................................................... 4-51

第５章

切土法面の植栽

5.1 切土法面植栽の基本的な考え方 .................................................................................................... 5-1
5.2 北海道の地域に応じた中低木樹種の選定 .................................................................................. 5-3
5.3 切土法面への木本導入手法 ............................................................................................................. 5-55.3.1 木本導入手法の検討 .............................................................................................................. 5-55.3.2 中低木導入数量の検討 ......................................................................................................... 5-65.3.3 木本導入に適した施工時期 ................................................................................................. 5-6
5.4 植生基盤造成手法の整理 ............................................................................................................... 5-7
5.4.1 「苗木設置吹付工」適用時の種子混播の考え方 ........................................................ 5-7
5.4.2 「苗木設置吹付工」適用時の植生基材吹付工の選定.............................................. 5-7

【樹木特性シート】 .......................................................................................................................................... 5-13

第６章

樹木の維持管理6.1 維持管理計画 ....................................................................................................................................... 6-1
6.2 樹木の維持管理 ...................................................................................................................................... 6-2
6.2.1 剪定と整枝 ................................................................................................................................... 6-2
6.2.2 病虫害防除 ................................................................................................................................. 6-16
6.2.3 獣害防除 ...................................................................................................................................... 6-27
6.2.4 支柱管理 ...................................................................................................................................... 6-30
6.2.5 冬囲い ......................................................................................................................................... 6-33
6.2.6 土壌の管理 ............................................................................................................................... 6-36
6.2.7 施肥 ............................................................................................................................................. 6-36
6.2.8 潅水 ................................................................................................................................................ 6-40
6.2.9 草刈と除草 ................................................................................................................................... 6-41
6.3 巡回点検 .................................................................................................................................................... 6-43
6.3.1 巡回点検の内容 ..................................................................................................................... 6-43
6.3.2 枯損木の管理 .......................................................................................................................... 6-45
6.4 健全度調査（街路樹診断） .............................................................................................................. 6-47

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