Lorenzentti F.Achieving potential herbage seed yields in species of temperate regions.Palmerston North:Proceeding of the ⅩⅦ International Grassland Congress,1993:1621-1628.
[8]
Nordestgaard A.The effects of quantity of nitrogen, date of application and the influence of autumn treatment on the seed yield of grasses.Hebblethwaite P D.Seed Production .1980:105-120.
[9]
Bean E W.Principles of Herbage Seed Production.Abery stwyth:Cambrian News Ltd.,1978:24-41.
Rowarth J S,Archie W J.Reproductive initiation,closing dates,nitrogen requirements and harvesting of smooth brome cv.Grasslands Tiki.Palmerston North:Proceedings of the ⅩⅦ International Grassland Congress,1993:1674-1675.
Young W C,ⅢChilcote D O,Youngberg H W.Seed yield response of perennial ryegrass to spring applied nitrogen at different rates of paclobutrazol.Journal of Applied Seed Production,1995,13:10-15.