作物学报Issue(6)：938-945,8.DOI:10.3724/SP.J.1006.2015.00938
多效唑处理对直播油菜机械收获相关性状及产量的影响
Effects of Paclobutrazol on Yield and Mechanical Harvest Characteristics of Winter Rapeseed with Direct Seeding Treatment
摘要
Abstract
The aim of this research was to study the effects and mechanism of paclobutrazol (PP333) treatments on rapeseed yield and mechanical harvesting. PP333was foliage sprayed with different concentrations at two stages (the closing of crop and the start of flower bud), on two varieties of rapeseed Yangguang 2009 and Fengyou 520. Our results demonstrated that PP333 treatment significantly increased the rapeseed lodging resistance, silique shattering resistance and yield. PP333of 300 mg L–1 at the bud be-ginning more significantly enhanced lodging resistance and silique shattering resistance, whereas 150 mg L–1 PP333 at crop closing period more significantly increased yield of the two varieties. PP333 treatment reduced seed number per pod, while enhanced pods per plant, 1000-grain weight and yield. At the same time, PP333 treatment increased root crown diameter, root-top ratio (fresh) and snapping resistance, whereas it reduced plant height and culm lodging index, resulting in reduced angle of plant lodging, which indicates an improvement in the resistance of root and stem lodging. Silique shattering resistance was increased due to increased silique water content, silique dry weight and delayed pod maturity. In summary, the crop closing period and 150 mg L–1 PP333 are the best treatment time and concentration for significantly enhancing the abilities of lodging resistance, silique shattering resis-tance and yield, which could meet rapeseed mechanized production.关键词
油菜/多效唑/产量/倒伏指数/抗裂角指数/机械收获Key words
Rapeseed/Paclobutrazol/Yield/Culm lodging index/Silique shatter resistance/Mechanical harvest引用本文复制引用
杨阳,蒯婕,吴莲蓉,刘婷婷,孙盈盈,左青松,周广生,吴江生..多效唑处理对直播油菜机械收获相关性状及产量的影响[J].作物学报,2015,(6):938-945,8.基金项目
本研究由国家科技支撑计划项目(2013BAD20B06,2014BAD11B03),国家现代农业产业技术体系建设专项(NYCYTC-00510),国家公益性(农业)科研专项经费项目(201203096)和教育部高校自主科技创新基金(2013PY001)资助。 （2013BAD20B06,2014BAD11B03）
