华北农牧交错区饲用玉米覆膜和施氮的效应研究
杜 雄,边秀举,张维宏,杨福存,张立峰
Effects of Plastic-film Mulching and Nitrogen Application on Forage Maize In Agriculture–animal Husbandry Ecotone of North China
中国农业科学 . 2007, (6): 1206 -1213 .  DOI: 10.3864/j.issn.0578-1752.at-2006-7872