ABSTRACT

In input intensive agriculture, weeds are major biotic constraints which are likely to increase and become more complex. Overreliance on single weed management practice may further exaggerate weed severity and also invite adverse effect, therefore, urgent technological intervention adopted on eco-friendly integrated weed management to improve weed control and sustaining the productivity in transplanted rice. The aim of the study was to compare two popular rice varieties (‘Swarna’ and ‘Mahamaya’) with two row spacing (15 and 20 cm) along with three weed management regimes [weedy, bispyribac sodium 25 g ha-1 and two hand weeding at 20 and 40 days after transplanting (DAT)] on weed suppression and rice productivity. Our findings suggest that Swarna at 15 cm spacing along with two hand weeding enhance the weed suppression and provides higher rice productivity and can be adopted as integrated weed management options to minimize yield loss due to weeds competition in the region. In the study, more than two factors of weed management have been attempted which provide additional information to researcher, policy makers and rice growers to choose and disseminate real integration of weed management options.

摘要

在投入密集型农业中，杂草是主要的生物限制因素，可能会增加并变得更加复杂。过度依赖单一杂草管理实践可能会进一步夸大杂草严重程度并引发不利影响，因此，迫切需要对生态友好型杂草综合管理采取技术干预措施，以改善杂草控制并维持移栽水稻的生产力。该研究的目的是比较两种流行的水稻品种（'Swarna' 和 'Mahamaya'），两种行距（15 和 20 厘米）以及三种杂草管理方案 [杂草、bispyribac sodium 25 g ha-1 和双手移栽后20天和40天除草（DAT）]对杂草抑制和水稻生产力的影响。我们的研究结果表明，间距为 15 厘米的 Swarna 以及双手除草增强了杂草抑制并提供了更高的水稻生产力，并且可以作为综合杂草管理选项采用，以尽量减少该地区杂草竞争导致的产量损失。在这项研究中，已经尝试了两种以上的杂草管理因素，为研究人员、政策制定者和水稻种植者提供了额外的信息，以选择和传播真正整合的杂草管理方案。