草业科学2018，Vol.35Issue(3)：551-557,7.DOI:10.11829/j.issn.1001-0629.2017-0187
陇东苹果园土壤浸提液对黑麦草和紫花苜蓿种子萌发及幼苗生长的影响
Effect of soil extract from an apple orchard on ryegrass and alfalfa seed germination and seedling growth in eastern Gansu
摘要
Abstract
Inclusion of grass into fruit-tree orchards,is a new strategy of soil management.Successful grassland establishment is essential for the construction of this model.However,the specificity of soils in apple orchards may affect grass seed germination and seedling growth;thereby,affecting grassland establishment.The effect of soil extract on ryegrass (Lolium perenne) and alfalfa (Medicago sativa) seed germination and seedling growth was studied in an apple orchard.Soil extract increased the number of germinated ryegrass seeds,but decreased the number of germinated alfalfa seeds.There was no effect of soil extract on seed germination rate of either species.Compared with no leaves remaining on the soil,extract from the soil with leaves accelerated the germination of the two grassseeds and tended to increase the germination rate.The soil extract from the apple orchard inhibited root growth and reduced seedling fresh weight of ryegrass and alfalfa seedlings.The root growth of alfalfa and ryegrass was inhibited by the falling leaves remaining on the soil.Therefore,in apple orchards,the effect of the soil on grassland development may be attributed mainly to the inhibition of seedling growth of grass species,rather than to the inhibition of seed germination.Falling leaves from apple trees may enhance such inhibition.Compared with the herbaceous species,the leguminous species was more susceptible to the inhibition observed.关键词
苹果园/生草/土壤浸提液/牧草/种子萌发/幼苗生长Key words
apple orchard/grass/soil extract/forage/seed germination/seedling growth分类
农业科技引用本文复制引用
王亚亚,杨梅,陆姣云,杨惠敏..陇东苹果园土壤浸提液对黑麦草和紫花苜蓿种子萌发及幼苗生长的影响[J].草业科学,2018,35(3):551-557,7.基金项目
国家科技支撑计划(2014BAD14B006) （2014BAD14B006）
国家自然科学基金(31572460) （31572460）
