Department of Physics and Astrophysics, University of Delhi, Delhi 110007, India.
Department of Environmental and Agricultural Engineering, Tokyo University of Agriculture and Technology, Tokyo 183-8509, Japan.
Sci Rep. 2017 Jan 4;7:39890. doi: 10.1038/srep39890.
We investigated the theoretical possibility of applying phenomenon of synchronization of coupled nonlinear oscillators to control alternate bearing in citrus. The alternate bearing of fruit crops is a phenomenon in which a year of heavy yield is followed by an extremely light one. This phenomenon has been modeled previously by the resource budget model, which describes a typical nonlinear oscillator of the tent map type. We have demonstrated how direct coupling, which could be practically realized through grafting, contributes to the nonlinear dynamics of alternate bearing, especially phase synchronization. Our results show enhancement of out-of-phase synchronization in production, which depends on initial conditions obtained under the given system parameters. Based on these numerical experiments, we propose a new method to control alternate bearing, say in citrus, thereby enabling stable fruit production. The feasibility of validating the current results through field experimentation is also discussed.
我们研究了将耦合非线性振荡器同步现象应用于控制柑橘果实隔年结果的理论可能性。果树枝条隔年结果是指一年果实产量大，次年则极少的现象。该现象先前已通过资源预算模型进行了描述，该模型描述了典型的帐篷映射类型非线性振荡器。我们已经证明了通过嫁接实现的直接耦合如何有助于隔年结果的非线性动力学，特别是相位同步。我们的研究结果表明，生产中的不同步同步增强取决于在给定系统参数下获得的初始条件。基于这些数值实验，我们提出了一种控制隔年结果的新方法，例如在柑橘中，从而实现稳定的果实生产。还讨论了通过田间实验验证当前结果的可行性。
