Effect of allelopathic rice varieties combined with cultural management options on paddy field weeds
Effect of allelopathic rice varieties combined with cultural management options on paddy field weeds
复制标题
化感水稻品种结合栽培管理方案对稻田杂草的影响
DOI：
10.1002/ps.1521
复制
发表时间：
2008-03-01
影响因子：
4.1
通讯作者：
Wu, Jing-Lun
中科院分区：
文献类型：
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作者：
Kong, Chui-Hua;Hu, Fei;Wu, Jing-Lun
背景技术背景：一些技术，包括文化管理，化感作用和生物除草剂，已被认为是合成除草剂的替代品，但成功的杂草控制将需要这些多种技术的仔细整合。本研究进行了评估使用化感水稻品种与水稻杂草的文化管理选项相结合，以开发一种化感为基础的技术，以减少除草剂的使用paddyes.RESULTS：杂草抑制效果的水稻品种的化感性状，种植模式和文化管理，包括种植密度，淹水深度和持续时间和供应的氮变化很大。在相同的种植方式和栽培管理条件下，化感水稻品种PI 312777和华感1号对杂草的抑制作用明显强于非化感水稻品种华尖线。他们的杂草抑制效果增加了文化管理的选择。特别是，如果化感水稻品种的综合栽培管理方案包括低剂量（苄嘧磺隆，25克AI公顷（-1）推荐剂量的三分之一）除草剂的应用，在稻田中发现的大多数杂草的出现和生长完全控制。在综合栽培管理方案下，化感品种的谷物产量没有减少，而对于非化感品种，即使使用低剂量除草剂，也可减少高达45-60%。结论：如果与栽培管理方案和低剂量除草剂的应用相结合，水稻品种的化感潜力可能会对水稻杂草控制产生很大影响。因此，在综合管理措施下种植化感水稻，减少除草剂的投入是可行的。(c)2008化学工业协会。
BACKGROUND: A number of techniques, including cultural management, allelopathy and bioherbicide, have been considered as alternatives for synthetic herbicides, but successful weed control will require the careful integration of these multiple techniques. This study was conducted to assess the use of allelopathic rice varieties in combination with cultural management options on paddy weeds, in order to develop an allelopathy-based technique to reduce herbicide use in paddies.RESULTS: The weed-suppressive effects of the rice varieties tested varied highly with allelopathic trait, planting pattern and cultural management including planting density, flooding depth and duration and supply of nitrogen. Allelopathic rice varieties PI312777 and Huagan-1 demonstrated much stronger weed suppression than the non-allelopathic variety Huajianxian under the same planting pattern and cultural management. Their weed-suppressive effect was increased with cultural management options. In particular, if integrated cultural management options of allelopathic rice varieties included a low-dose (bensulfuron-methyl, 25 g AI ha(-1) a third of the recommended dose) herbicide application, the emergence and growth of most weeds found in paddy fields was completely controlled. No grain yield reduction for allelopathic varieties occurred under integrated cultural management options, whereas with the non-allelopathic variety a reduction of up to 45-60% was measurable even with the low-dose herbicide application.CONCLUSION: The allelopathic potential of rice varieties will likely have a great impact on paddy weed control if integrated with cultural management options and application of low doses of herbicides. Therefore, it is feasible to reduce herbicide input in paddies if allelopathic rice is grown under integrated cultural management practices. (c) 2008 Society of Chemical Industry.