5张锦熙 刘锡山.Leaf stage index promoting-controlling method for wheat cultivation and management[J].Scientia Agrcultura Sinica (中国农业科学),1987,:18-28.
6Sanjeev K,Rajender K,Harbir S.Influence of time sowing and N P fertilization on grain quality of macaronl wheat (Triticum durum).Haryaana Agric Univ J Res,2000,32(1):31-33
7Jan M T,Muzammil S,Sanaullah K.Type of N-fertilizer,rate and timing effect on wheat production.Sarhad J Agric,2002,18(4):405-410
8Johnson G V,Rann W R.Nitrogen response index as a guide to fertilizer management.J Plant Nutr,2003,26(2):249-262
9Hussain M L,Shan S H,Sajjad H,Khalid I.Growth,yield and quality response of three wheat (Triticum aestivum L.) varieties to different levels of N,P and K.Int JAgric & Biol,2002,4(3):362-364
10Singh A K,Jain G L.Effect of sowing time,irrigation and nitrogen on grain yield and quality of durum wheat (Triticum durum).Indian JAgric Sci,2000,70(8):532-533
