Abstract: The objective of this study was to screen out the suitable and efficient short-term rotation systems of annual winter forage mixtures, with maize on dry farming land for increasing forages To develop livestock in subtropical low mountainous and hilly area of Sishuan Basin in China.This experiment was repeated for three years and all of the data are the average value and the common tendency of them in three years.The result showed that the three rotation systems of Astragalus sinicus(80%) + Loium multifiorum(20%)→Zes mays, theicago hispida (70%)+ Lolium multiflorum (30%)→An may and Vicia villosa (75%) + Lolium multifiourum(25%)→Ze mays obtained good forage values (DM 5.31~5.77 t/hm², TDOM 4.06~4.36 t/m², CP 1.10~1.58 t/ha, ME 3.18~3.39 × 10⁴ Mi/hm².Ca 33.62~52.49 kg/hm².P 27.79~30.59 kg/hm²) while the yields of subseqent crops of corns were lower than that of CK under the condition without significant differences, between those three treatments and CK.The function of nutritive mutual complementary of grasses and legumes and the utilization efficiency of crop and niche have been increased due to the use of those three rotation systems, thus the grass productivity of cropland has been also increased.

Key words: Winter forage mixture, Rotation, Hispida, Italian ryegrass, Maize, Grass productivity

摘要： 本项研究旨在为四川盆地亚热带低山丘陵区增产饲料发展牧业探索高效的旱地混潘冬性一年生牧草－玉米短期草田轮作系统。重复了三年,所有资料为三年的平均值和共同趋势。研究结果表明,混播冬性一年生禾草和豆草与玉米轮作,即意大利黑麦草(20%)+紫云英(80%)→玉米、意大利黑麦草(30%)+南苜蓿(70%)→玉米和意大利黑麦草(25%)+长柔毛野豌豆(75%)→玉米三个轮作系统。在玉米产量稍低于对照但差异不显著的情况下,获得了很高的饲料价值(DM5.31～5.77t/hm²,TDOM4.06～4.36t/hm²,CP1.10～1.58t/hm²,ME3.18～3.39×10⁴MJ/hm²,Ca33.62～52.49kg/hm²,P27.79～30.59kg/hm²),较充分地利用了禾草和豆草的共生互惠作用,提高了农田生态位的利用效率,从而获得较高的总生产效率。

关键词: 混播冬性牧草, 轮作, 南苜蓿, 意大利黑麦草, 玉米, 总生产效率