No-herbicide Cropping System of High Protein Forage by Use of Italian Ryegrass Living Mulch
A field experiment was conducted to develop a noherbicide cropping system of high protein forage. The first crop of winter habit Italian ryegrass sown in early-April produced DM yield of 4.5t/ha (crude protein content: 13.5%) in mid-June and the succeeding crop of soybean no-till planted into ryegrass produced DM yield of 5.1t/ha (crude protein content: 19.7%) in Late-October. In this cropping system, the ryegrass remained in vegetative phase during all cropping season and formed dense sod. This sod functioned as living mulch and suppressed weeds without herbicide application both during ryegrass and soybean cropping. Though the soybean germinated under the canopy of regrowing ryegrass sod, its growth was scarcely depressed by the canopy shade because the seedling of soybean appeared above the canopy of sod in a few days. Contrariwise, the ryegrass was gradually shaded by the soybean and had died before October harvest. The degree of weed suppression by the ryegrass living mulch varied with seeding rate of ryegrass or weed pressure in the field. The optimum seeding rate to suppress weed was 50kg/ha in the field with low or medium weed pressure and was 80 kg/ha in the field with high weed pressure.
Italian ryegrass Living mulch Soybean Silage
Sunao Uozumi Eiko Touno Shin Deguchi
National Agricultural Research Center for Touhoku Region, Morioka, Iwate, Japan
国际会议
首尔
英文
64-65
2009-08-10（万方平台首次上网日期，不代表论文的发表时间）