Study On The Yield And Quality Of Different Grass In Winter Fallow Field And Its Influence On Soil Physical And Chemical Properties

In order to study the effect of different forage combinations on the forage nutrient value and soil physical and chemical properties, Annual ryegrass (Lolium multiflorum Lam.), Chinese Milk vetch (Astragalus sinicus L.), White clover (Trifolium repens L.), the three kinds of common winter forage of Hunan as the research object, set 5 kinds of treatment, Respectively:Ryegrass, White clover, Chinese milk vetch, ryegrass+white clover, ryegrass +Chinese milk vetch. The nutrition value and soil physical and chemical characters of different growth stages were analyzed. The main results are as follows:1. Ryegrass+Chinese milk vetch and ryegrass+white clover two mixed planting mode of production reached 26443.67kg/hm~2,24230.28 kg/hm~2, compared to three kinds of forage grass of seeding alone, yield were significant get improved. Ryegrass+Chinese milk vetch mixed planting mode have highest nutritive value, With the development of forage grass, the contents of crude protein, crude fat, crude ash, P and Ca decreased gradually, and the content of crude fiber increased gradually.2. Compared with the control, The soil fertility increased significantly after planting forage grasses in the winter fallow field, mixed planting was significantly higher than that of solo planting.Comprehensive analysis shows that:Ryegrass+Chinese milk vetch mixed seeding mode have the best performance, the highest total yield, the most significant increase in nutritional value and the greatest impact on soil physical and chemical properties.