McSorley R, Gallaher R N
J Nematol. 1993 Dec;25(4 Suppl):814-9.
Effects of tillage and crop rotation on nematode densities in tropical corn (Zea mays cv. Pioneer X304C) were examined in a factorial experiment with two rotation crops and two tillage practices (no-till vs. conventional-till), conducted in each of three seasons (1990-1992) in north Florida. The rotation treatments consisted of sorghum (Sorghum bicolor cv. DeKalb BR64) or soybean (Glycine max) grown during the 1989 season. Densities of Meloidogyne incognita (race 1) remained lower throughout the growing season in corn following sorghum than in corn plots following soybean. This effect was observed clearly even in the third consecutive corn crop. In 1990, densities of Criconemella spp. were initially higher in plots planted to sorghum the previous year, but by the end of the subsequent corn crop, no differences were evident. Paratrichodorus minor and Pratylenchus spp. (primarily P. scribneri) were mostly unaffected by the crop rotation treatments, but in a few instances, Pratylenchus spp. densities were higher in conventional than in no-till plots. In general, tillage had little effect on densities of most nematodes examined, and rotation appears to be more important than tillage for managing plant-parasitic nematodes under these conditions.
在佛罗里达州北部于1990 - 1992年的三个季节中，通过一项析因试验研究了耕作和作物轮作对热带玉米（品种先锋X304C）中线虫密度的影响，该试验有两种轮作作物和两种耕作方式（免耕与传统耕作）。轮作处理包括在1989年种植高粱（品种德卡尔布BR64）或大豆。在高粱后的玉米生长季节中，南方根结线虫（1号小种）的密度在整个生长季节都低于大豆后的玉米地块。即使在连续第三季种植玉米时，这种效应仍很明显。1990年，前一年种植高粱的地块中环线虫属的密度最初较高，但在随后的玉米作物收获结束时，差异并不明显。微小拟毛刺线虫和短体线虫属（主要是斯氏短体线虫）大多不受作物轮作处理的影响，但在少数情况下，传统耕作地块中的短体线虫属密度高于免耕地块。总体而言，耕作对所检测的大多数线虫的密度影响较小，在这些条件下，轮作对于管理植物寄生线虫似乎比耕作更为重要。
