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结合宁夏南部山区的生长条件,在梯田和坡耕地两种地势条件下,设置不同比例的牧草混播组合,测定牧草群体的生长性状、地上生物量和营养成分等指标,对宁南山区苜蓿和羊草混播种植进行研究。结果表明:梯田种植的紫花苜蓿和羊草的株高和茎叶比均高于坡耕地;坡耕地的地上生物量高于梯田;梯田条件下紫花苜蓿与羊草混播比例为3∶2时紫花苜蓿的饲用价值较好,坡耕地条件下紫花苜蓿与羊草混播比例为2∶1时羊草的饲用价值较好。本研究筛选出最适宜宁夏南部山区种植牧草的混播比例,为宁南地区紫花苜蓿和羊草人工混播草地的改良建植积累基础数据。
According to the growth conditions in the mountainous area of southern Ningxia, the grass mixed planting with different proportions was set up under the terrain conditions of terraced fields and sloping cultivated land. The growth traits, aboveground biomass and nutrient components were determined. Grass mixed planting study. The results showed that the plant height and the ratio of stem to leaf of alfalfa and Leymus chinensis planted in terraced fields were higher than those in sloping cultivated land; the aboveground biomass in sloping cultivated land was higher than that in terraced fields; and the proportion of alfalfa and Leymus chinensis mixed in terraced fields was 3: 2, The feed value of alfalfa was better, and the feed value of Leymus chinensis was better when the ratio of alfalfa to Leymus chinensis was 2: 1. This study screened out the most suitable proportion of mixed planting of forage grass in mountainous areas of southern Ningxia to accumulate the basic data for improved planting of alfalfa and Leymus chinensis artificial mixed grassland in south Ningxia.