Suppression of entireleaf morning glory (Ipomoea hederacea Jacq. var. integriuscula A. Gray) growth by lawngrass (Zoysia japonica Steud.) on soybean field levees in southwestern Japan
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引用次数: 0
Abstract
The spread of morning glory (Ipomoea spp.) in Japanese soybean (Glycine max (L.) Merr.) fields has severely decreased soybean yields. Field levees are believed to be a source of this invasion. The introduction of Zoysia japonica Steud. is expected to suppress weed growth and reduce the required labor for weed management on the levees. In this study, field experiments were conducted on the soybean levees of turf (Z. japonica), bare, and weed (mainly broad leaf weeds such as white clover) from 2017 to 2019 to compare its effects on the occurrence, growth, and seed production of I. hederacea (L.) Jacq. var. integriuscula A. Gray. The canopy height in the turf levee was the lowest, and the vegetation cover rate was the highest. At the flowering and fruiting stage of I. hederacea var. integriuscula (September), the largest number of I. hederacea var. integriuscula that survived were on the turf levee; however, the plant length, dry weight, and the number of fruits were the least. Additionally, the stems of the morning glory on the turf levee were slight and spindly, and their growth and seed productivity were suppressed. Consequently, vegetation conversion to Z. japonica on the soybean field levees can be an effective strategy to suppress the colonization and growth of morning glory, thereby, improving soybean yields.
日本大豆(Glycine max (L.) Merr.)田中牵牛花(Ipomoea spp.)的蔓延严重降低了大豆产量。田间堤坝被认为是这种入侵的源头。引入 Zoysia japonica Steud.有望抑制杂草生长,减少堤坝上杂草管理所需的劳动力。本研究从 2017 年到 2019 年在大豆堤坝上进行了草皮(Z. japonica)、裸草和杂草(主要是白三叶等阔叶杂草)的田间试验,以比较其对 I. hederacea (L.) Jacq. var. integriuscula A. Gray 的发生、生长和种子产量的影响。草皮堤坝的树冠高度最低,植被覆盖率最高。在 I. hederacea var. integriuscula 的开花结果期(9 月),草皮堤坝上存活的 I. hederacea var. integriuscula 数量最多,但植株长度、干重和果实数量最少。此外,草皮堤坝上的牵牛花茎干细弱,生长和种子产量受到抑制。因此,在大豆田堤坝上改种牵牛花可以有效抑制牵牛花的定殖和生长,从而提高大豆产量。
期刊介绍:
Weed Biology and Management is an international journal, published four times per year. The journal accepts contributions in the form of original research and review articles in all aspects of weed science. Contributions from weed scientists in the Asia–Pacific region are particularly welcomed.
The content of the contributions may relate to weed taxonomy, ecology and physiology, weed management and control methodologies, herbicide behaviors in plants, soils and environment, utilization of weeds and other aspects of weed science. All contributions must be of sufficient quality to extend our knowledge in weed science.