禾本科及豆科牧草对黄土丘陵区台田土壤培肥效果的比较研究  

EFFECTS OF RAISING SOIL FERTILITIES BY PLANTING DIFFERENT FORAGE SPECIES ON NEWLYBUILT TERRENCE LAND ON CHINA LOESS HILLY REGIONS

作　　者：刘洪岭[1] 李香兰[1] 梁一民[1] 

机构地区：[1]中国科学院水土保持研究所

出　　处：《西北植物学报》1998年第2期287-291,共5页Acta Botanica Boreali-Occidentalia Sinica

摘　　要：以黄土丘陵区具有代表性的禾本科及豆科牧草无芒雀麦和沙打旺为材料，研究其对川台地土壤腐殖质含量和组成、有关营养元素及后茬作物产量的不同影响。结果表明，种植禾本科及豆科牧草均能提高土壤中腐殖质及氮磷营养的水平，其中禾本科牧草效果较豆科牧草更为明显。它们对土壤中微量元素的影响因各自对营养元素的利用程度而异。两种牧草样地后茬作物的产量以沙打旺为高，无芒雀麦不宜与禾本科作物轮作。he experiment was conducted with two different forage species during its 4 years growth on newlybuilt terrence land on China loess hilly region to study the effects on raising of soil humics and nutrient by cultivation of smooth bromegrass and erect milkvetch respectly.The resoults show that the soil humics,nitrogen and phosphorous content can be significantly raised by planting both of the forage species,and the treatment which smooth bromegrass being planted has the best effect on improvement of soil fertilities.On the other hand,the soil content of soil microelement changes with the different utilization of the two forage species.Although the treatment which smooth bromegrass being planted has the best effect on raising soil fertilities,the yield of millet which was planted on the field where smooth grass priviously being planted is ratively low.

关 键 词：无芒雀麦 沙打旺 丘陵台田 培肥 

分 类 号：S55[农业科学—作物学] S58