C. H. D. L. E. Silva, Carlos E. L. Mello, J. O. D. Silva, A. Jakelaitis, R. P. Marques, Gustavo D. de Sousa, Elias J. da Silva
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引用次数: 0
摘要
玉米与饲料种间作是农业系统中常用的一种替代方法。作物间的竞争可能是间作的限制因素,影响玉米和饲料产量。虽然有必要,但对于最近在市场上推出的饲料作物,如BRS Zuri,间作玉米,文献并没有提供令人满意的答案。因此,使用除草剂亚剂量等技术作为抑制牧草生长的一种选择,使同时种植成为可能。因此,本研究旨在评价草甘膦除草剂亚剂量对大白菜生长发育的影响。BRS Zuri间作抗农达玉米,以及这种相互作用对杂草种群、饲料产量、玉米生物计量学和产量变量的影响。实验设计为随机分组,处理包括6个亚剂量的草甘膦除草剂(0、48、96、240、480和960 g酸当量[a.e。[ha-1]和玉米在单栽培中有4个重复。在本研究条件下,由于有抑制杂草和充分的饲料开发,480 g a.e. ha-1的草甘膦剂量可能是一种替代方案。玉米产量不受饲料存在的影响。
Use of glyphosate in the management of Panicum maximum cv. BRS Zuri intercropped with maize
ABSTRACT The intercropping between maize and forage species is an alternative commonly used within farming systems. Competition among crops may be a limiting factor in intercropping, compromising maize and forage yield. Although necessary, the literature does not provide satisfactory answers on the interaction of forage crops launched in the market recently, such as BRS Zuri, intercropped with maize. Therefore, techniques such as the use of herbicide subdoses come in as an option to suppress forage growth, making simultaneous cultivation feasible. Thus, the present study aimed to evaluate the effects of glyphosate herbicide subdoses on the development of Panicum maximum cv. BRS Zuri intercropped with Roundup Ready® (RR) maize and how this interaction reflects on the weed population, forage yield, and biometric and yield variables of maize. The experimental design was randomized blocks with treatments consisting of six subdoses of glyphosate herbicide (0, 48, 96, 240, 480, and 960 g acid equivalent [a.e.] ha-1) and maize in monoculture with four replications. For the conditions of this study, the dose of 480 g a.e. ha-1 of glyphosate may be an alternative since there was weed suppression and adequate forage development. Maize yield was not affected by the presence of forage.