ICS65.020.20DB21B 32辽宁省地方标准 DB 21/T 2552—2016 辽河流域棉区棉花高产高效栽培技术规程 Technical Regulation on High-yielding and Efficiency Cultivation in Cotton in Liaohe Basin 2016-01-05发布2016-03-05实施辽宁省质量技术监督局发 布 DB21/T 2552—2016目次前言 ............................................................................... iii引言 ................................................................................ iv1范围 .............................................................................. 12规范性引用文件 .................................................................... 13术语和定义 ........................................................................ 13.1短季棉品种 .................................................................... 13.2全程化学调控 .................................................................. 13.3苗期 .......................................................................... 13.4蕾期 .......................................................................... 13.5花铃期 ........................................................................ 13.6吐絮期 ........................................................................ 24播种 .............................................................................. 24.1品种选择 ...................................................................... 24.2播前准备 ...................................................................... 24.3播种 .......................................................................... 24.4覆膜 .......................................................................... 35苗期管理 .......................................................................... 35.1破膜放苗 ...................................................................... 35.2间苗定苗 ...................................................................... 35.3补种移栽 ...................................................................... 35.4灌水和排涝 ...........