Publication Date
1997
Description
The objective of this study was to determine the factor causing yield decrease of corn (Zea mays L.) sown into Italian ryegrass (Lolium multiflorum Lam.) by minimum tillage. 5 plots with 2 replications were made, consisting of the number of harvest times of Italian ryegrass, tillage system, and herbicide application. They were 1CT (Italian ryegrass was harvested once/conventional tillage), 1MT (once/minimum tillage), 1MTH (once/MT/herbicide), 2CT (twice/ CT), and 2MT (twice/MT). 1MT produced lowest corn yield and highest Italian ryegrass litter. This observation suggested that corn yield decrease was attributed to competition with Italian ryegrass regrowth. NAR in 1MT after 5 leaf stage indicated considerable decline in comparison with the others. Relative light intensity was under 5% in 1MT, in which the corn couldn't grow. There was no certain trend between plots in soil property. From these results, it was concluded that shading caused by Italian ryegrass was the main factor of yield decrease of corn in minimum tillage.
Citation
Kobayaski, R; Tateno, K; and Sato, S, "Yield Decrease of Corn Sown into Italian Ryegrass by Minimum Tillage" (2024). IGC Proceedings (1997-2023). 18.
https://uknowledge.uky.edu/igc/1997/session19/18
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Yield Decrease of Corn Sown into Italian Ryegrass by Minimum Tillage
The objective of this study was to determine the factor causing yield decrease of corn (Zea mays L.) sown into Italian ryegrass (Lolium multiflorum Lam.) by minimum tillage. 5 plots with 2 replications were made, consisting of the number of harvest times of Italian ryegrass, tillage system, and herbicide application. They were 1CT (Italian ryegrass was harvested once/conventional tillage), 1MT (once/minimum tillage), 1MTH (once/MT/herbicide), 2CT (twice/ CT), and 2MT (twice/MT). 1MT produced lowest corn yield and highest Italian ryegrass litter. This observation suggested that corn yield decrease was attributed to competition with Italian ryegrass regrowth. NAR in 1MT after 5 leaf stage indicated considerable decline in comparison with the others. Relative light intensity was under 5% in 1MT, in which the corn couldn't grow. There was no certain trend between plots in soil property. From these results, it was concluded that shading caused by Italian ryegrass was the main factor of yield decrease of corn in minimum tillage.
