Chemical-dependent weed control has led to the evolution of herbicide-resistant weeds and pollution of arable land and water systems, posing a great threat to food security and environmental safety. For the first time, we developed a simple weed management regime to ecologically deplete the weed seed bank under a wheat-rice cropping system, which in turn allowed a reduction in the frequency of conventional herbicide applications while sustainably reducing weed infestation levels. The key ecological methods adopted here involve cleaning irrigation water by intercepting seeds at the water entrance and exit and removing floating weed seeds with a net during irrigation before rice planting, which significantly reduced the input of weed seeds into the seed bank. Quantitative analysis of the weed seed bank and population dynamics showed that implementation of this management regime consecutively for 6 years reduced the density of the total weed seed bank by 51% and the dominant grassy weed population density by 53% compared to those at the beginning. The effect of this ecologically sound weed control regime was comparable to that of conventional dual- or triple-application herbicide chemical control in each crop growing season. The results indicated that, compared with the conventional control method, the integrated weed management method could reduce the number of herbicide applications by half and reduce costs and labor by 30%. Furthermore, quantitative modeling analysis of the seed bank and population dynamics of the dominant weed species, Alopecurus japonicus, showed that continuous adoption of this ecological strategy could deplete the seed bank by more than 90%, thereby freeing the fields of the presence of this noxious weed.

依赖化学物质的杂草控制导致了抗除草剂杂草的发展以及耕地和水系统的污染，对粮食安全和环境安全构成了巨大威胁。我们首次开发了一种简单的杂草管理制度，以在小麦-水稻种植体系下生态耗竭杂草种子库，从而减少了常规除草剂的施用频率，同时持续降低了杂草侵害水平。这里采用的关键生态方法包括在水稻种植前的灌溉期间通过在进水口和出水口截取种子来清除灌溉用水并用网除去漂浮的杂草种子，这大大减少了杂草种子进入种子库的投入。杂草种子库和种群动态的定量分析表明，与开始时相比，连续6年实施该管理制度可使杂草种子库的总密度降低51％，优势草杂草种群密度降低53％。这种生态上合理的杂草控制制度在每个作物生长季节的效果均与常规的两次或三次施用除草剂化学防治效果相当。结果表明，与常规防治方法相比，杂草综合治理方法可将除草剂施用量减少一半，成本和劳力减少30％。此外，对优势杂草物种的种子库和种群动态进行定量建模分析，这种生态上合理的杂草控制制度在每个作物生长季节的效果均与常规的两次或三次施用除草剂化学防治效果相当。结果表明，与常规防治方法相比，杂草综合治理方法可将除草剂施用量减少一半，成本和劳力减少30％。此外，对优势杂草物种的种子库和种群动态进行定量建模分析，这种生态上合理的杂草控制制度在每个作物生长季节的效果均与常规的两次或三次施用除草剂化学防治效果相当。结果表明，与常规防治方法相比，杂草综合治理方法可将除草剂施用量减少一半，成本和劳力减少30％。此外，对优势杂草物种的种子库和种群动态进行定量建模分析，杂草综合治理方法可将除草剂的施用量减少一半，并将成本和人工减少30％。此外，对优势杂草物种的种子库和种群动态进行定量建模分析，杂草综合治理方法可将除草剂的施用量减少一半，并将成本和人工减少30％。此外，对优势杂草物种的种子库和种群动态进行定量建模分析，Alopecurus japonicus指出，持续采用这种生态策略可能会使种子库消耗90％以上，从而使田野摆脱了这种有害杂草的存在。