| 直播早稻杂草发生规律研究 |
| |
| 引用本文： | 陈宇博,赖朝晖,许燎原,金彬,赵丽稳,刘桂良.直播早稻杂草发生规律研究[J].农学学报,2015,5(8):27-30. |
| |
| 作者姓名： | 陈宇博 赖朝晖 许燎原 金彬 赵丽稳 刘桂良 |
| |
| 作者单位： | 宁波市植物检疫站,象山县植物保护检疫站,宁波市种植业管理总站,宁波市植物检疫站,宁波市种植业管理总站,宁波市种植业管理总站 |
| |
| 基金项目： | 宁波市农业科研攻关项目“粮食生产功能区稻、麦田杂草综合防治技术研究和示范”(2009C10037)。 |
| |
| 摘 要： | 为明确直播早稻田间主要杂草群落组成及发生趋势,指导农民科学使用除草剂。采用"W"型五点取样法对象山县直播早稻田杂草群落开展调查。结果表明,直播早稻田杂草共有5科14种,以千金子、稗草为主要杂草,禾本科、莎草科及阔叶杂草分别占杂草出草总量的73.2%、13.6%和13.2%。播种后3~4天禾本科杂草开始萌发,特别是稗草出草较早,播后7~14天莎草科、阔叶杂草开始萌发。播后28天,出现第一个出草高峰,杂草总量达427株/m~2,主要为禾本科杂草,占总出草量的82.7%。播后42天时出现出草高峰趋势,达到364株/m~2,主要是阔叶杂草和莎草科杂草大量萌发。
|
| 关 键 词： | 直播水稻 杂草 发生规律 |
| 收稿时间： | 2014/11/19 0:00:00 |
| 修稿时间： | 2015/1/4 0:00:00 |
The Analysis of Occurrence Regularity of Weeds in Direct Seeding Early Rice Fields |
| |
| Abstract: | In order to make clear the species and emergence trend of weeds in direct seeding early rice fields, to help farmers apply herbicide reasonably.Weed communities in direct seeding early rice fields of Xiangshan were studied by using W type five-point sampling method. The results showed that there were 14 species belonging to 5 families of weeds appearing in rice fields, Leptochloa chinensis, Echinochloa crusgalli were main species of weeds, total numbers of seedling emergence were 73.2%, 13.6%, 13.2% for grasses, sedges and broadleaf weeds, respectively. Grass weeds started to emerge in the fields 3 to 4 days after rice was seeded, E. Crusgalli germinated earlier especially. Sedge weeds and broadleaf weeds started to emerge in the fields 7 to 14 days after rice was seeded. Emergence peaks appear 28 days after rice was seeded, Numbers of weed species were 427, Grasses weeds composed the majority of weeds, accounted for a total of?82.7%. Because of a mass of sedges and broadleaf weeds germinating, the total amount of the weeds appear emergence peaks trend 42 days after rice was seeded, Numbers of weed species were 364. |
| |
| Keywords: | direct seeding early rice weeds occurrence regularity |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《农学学报》浏览原始摘要信息 |
| 点击此处可从《农学学报》下载免费的PDF全文 |
|
