...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Australian Journal of Crop Science >Effect of water regimes on germination of weed seeds in a Malaysian rice field
【24h】

Effect of water regimes on germination of weed seeds in a Malaysian rice field

机译：水分制度对马来西亚稻田杂草种子发芽的影响

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The effect of different water regime treatments on the viability of weed seeds in direct-seeded rice field was evaluated. Five water regime treatments were used namely, continuous flooding condition until maturity, early flooding until 55 DAS (day after sowing) followed by saturated condition until maturity, early flooding until 30 DAS followed by saturated condition until maturity, continuous saturated condition until maturity, and continuous field capacity condition throughout the experimental period. Total weed seed population in soil sampled from March-May. The results showed that weed population dominated by broadleaved weeds (90625 seeds m-2), mainly Hedyotis corymbosa, Monochoria vaginalis and Ludwigia hyssopifolia, followed by sedges (34257 seeds m-2), mostly F. miliacea and Cyperus iria. The grasses, predominantly Leptochloa chinensis, recorded the lowest number in all water regime treatments (20647 seeds m-2). In soils sampled from September-November, sedges (53041 seeds m-2) mainly Fimbristylis miliacea along with broadleaved weeds (54624 seeds m-2), predominantly Monochoria vaginalis and Ceratopteris pteridoides, dominated in most of the water regime treatments, while grasses, mainly Leptochloa chinensis and Panicum repens, recorded the lowest number (24935 seeds m-2). Ten weed species, which were not observed in the field trials, were recorded from the same soils used in the weed seedbank study. The results showed that differences in water regime treatments did not significantly reduce the viability of weed seeds in the soil. However, a small reduction in seed viability (approximately 8%) was observed in soil samples during the September- November period.
机译：评价了不同水处理方式对直播稻田杂草种子活力的影响。使用了五种水处理方法，即连续淹水条件直至成熟，早期淹水直到55 DAS（播种后的第二天），随后是饱和条件直至成熟，早期淹水直到30 DAS，然后是饱和条件直到成熟，持续饱和条件直到成熟，以及在整个实验期间都具有连续的场容量条件。从三月到五月采样的土壤中杂草种子总数。结果表明，杂草种群以阔叶杂草（90625种子m-2）为主导，主要是硬皮菊（Hedyotis corymbosa），阴道单孢菌（Monochoria阴道）和路德维希草（Ludwigia hyssopifolia），其次是莎草（34257种子m-2），主要是纤毛草和莎草。在所有水域处理中，草（主要是羊草）记录的数量最少（20647种子m-2）。在9月至11月采样的土壤中，莎草（53041种子m-2）主要是纤毛纤毛（Fimbristylis miliacea）以及阔叶杂草（54624种子m-2），主要是阴道单孢菌和角翅目Ceratopteris pteridoides，在大多数水处理中，草，记录数最少（24935个种子，m-2），主要是中华小菜蛾和白头翁。从杂草种子库研究中使用的相同土壤中记录了10种在田间试验中未观察到的杂草物种。结果表明，水处理方式的差异并没有显着降低土壤中杂草种子的活力。但是，在9月至11月期间，土壤样品中发现了种子活力的小幅下降（约8％）。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号