施肥对无芒雀麦和老芒麦种子产量的影响

以无芒雀麦和老芒麦为材料，研究不同施肥处理对其种子产量的影响，结果表明，无芒省麦种子产量随着春季施氮量的增加而增加，其中以施氮２００ｋｇ／ｈｍ＾２的种子产量最高；而秋季则以施氮１００ｋｇ／ｈｍ＾２的种子产量最高，春秋分期施１００ｋｇＮ／ｈｍ＾２（秋季７０ｋｇＮ／ｈｍ＾２＋春季３０ｋｇＮ／ｈｍ＾２）种子产量不仅高于分期施２００ｋｇＮ／ｈｍ＾２，而朋也高于春季或秋季其它施肥处理，此外，施肥可以大幅度提

Effects of Fertilizer Application on Seed Yield of Smooth Bromegrass and Siberian Wildrye

The experiments of nitrogen application were conducted with smooth bromegrass ( Bromus inermis L. ) and siberian wildrye ( Elymus sibiricus L. ) to study the changes of seed yield. Seed yield of smooth bromegrass was improved with the application N rate increasing in spring, and maximum seed yield was harvested at application 200kgN/hm 2. In autumn fertilizer treatments maximum seed yield was attained at 100kgN/hm 2. Seed yield of smooth bromegrass harvested at split application (Autumn 70kgN/hm 2 + Spring 30kg N/hm 2) was not only higher than split application 200kgN/hm 2, but also than spring or autumn application. Seed yield of siberian wildrye growing three years was increased greatly by application.