关键词: 褐飞虱, 混, 沌, 功率谱图, 返回映象, 自相关函数, Poincare截面, 相轨迹图

Abstract: This paper introduced the main kinds of slow/controlled release fertilizers, and summarized the research advances in their action mechanisms and application effects in agriculture. Slow/controlled release fertilizers have positive effects on crop growth and grain yield, can improve the fertilizer N use efficiency to some extent, and protect the environment by inhibiting NH₄⁺ oxidizing to NO₃^- and reducing the accumulation of NO₃^- in soil, which in turn decreases the fertilizer N losses and environmental pollution. The N₂O emission from soil can be also mitigated by slow/controlled release fertilizers. The issues and further directions in the applied research of slow/controlled release fertilizers were brought forward.

Key words: Nilaparvata lugens, Chaos, Power spectrum figure, Return map, Autocorrelation function, Poincare section, Phase trajectory figure