| 武志峰，曾研华，谭雪明，曾勇军，潘晓华，石庆华，吴自明.直播早籼稻品种苗期耐冷性鉴定与筛选[J].广东农业科学,2018,45(4):1-5 |
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直播早籼稻品种苗期耐冷性鉴定与筛选 |
| Identification and screening of cold tolerance of direct-seedling early rice cultivars at seedling stage |
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| DOI：10.16768/j.issn.1004-874X.2018.04.001 |
| 中文关键词: 早籼稻 低温 直播 苗期 隶属函数法 |
| 英文关键词: low temperature early rice seedling stage subordination function method |
| 基金项目:国家重点研发计划项目（2017FD0301605）；江西省科技计划项目（20171ACF60018）；江西省科
技支撑计划项目（20123BBF60167）；江西省自然科学基金（20161BAB214171）；江西省教育厅科学技术研究项目
（GJJ150380） |
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| 摘要点击次数: 2252 |
| 全文下载次数: 919 |
| 中文摘要: |
| 直播早稻易遭受低温危害，造成烂秧死苗。为降低低温冷害对直播早稻生产的威胁，以18 个
江西推广的早籼稻品种为材料，进行苗期低温（5.0℃）处理，筛选适合大规模推广种植的早籼稻耐冷性品
种。结果表明，低温胁迫处理后，不同生长指标较正常温度（CK）均有所下降，其中存活率、地上部干重、
根数、根系体积、叶面积的变异系数较大，变异系数依次为根系体积＞存活率≥倒三叶叶面积＞根数＞倒
一叶叶面积≥倒二叶叶面积＞地上部干重；因子分析表明，存活率及地上部干重最能代表早稻幼苗对低温
的响应状况，可作为苗期耐冷性鉴定的评价指标；利用隶属函数法和聚类分析获得耐冷性较强的早稻品种
6 个，中等耐冷性品种6 个，耐冷性较弱品种6 个。 |
| 英文摘要: |
| Direct-seedling early rice is vulnerable to hypothermia，causing the seedling to rot or die.To reduces
low temperature stress and select cold tolerance rice varieties at seedling stage to be direct seeding in early season，
pot experiment with 18 early rice varieties was conducted under differently artificial low temperature（ 5.0℃）
treatment and normal temperature condition. The results showed that 18 early rice varieties low temperature treatment
indexs lower than normal temperature condition. The variation coefficient of seedling livabilit，aboveground biomass，
the neumber of roots，root number，root volume，leaf area were relatively large under low temperature treatment，
root volume ＞ seedling livabilit ≥ thir dleafunder the centralleaf area ＞ root number ＞ leafunder the centralleaf
area ≥ second leafunder The centrallea area ＞ aboveground biomass. Accoording to factor analysis method showed
that livabilit and aboveground biomass played a major role. Six stronger cold tolerance varieties，six intermediate cold
tolerance varieties and six weaker cold tolerance varieties were obtained by using the method of subordination function
method and accumulation analysis. |
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