小麦孕穗肥用量比较研究

目的]为明确小麦孕穗肥的作用和最佳用量.方法]抽穗后1个月调查单茎绿叶数量,成熟前取样测定植株性状和穗部性状.结果]孕穗肥最佳用量为97.5 kg/hm2尿素,其次为120 kg/hm2尿素,用量低于75 kg/hm2尿素时作用不显著,用量超过120kg/hm2尿素时不但施用不经济,而且会引起施用效果的下降.结论]施用孕穗肥能减少小穗、小花的退化,增加结实小穗的结实粒数,全面提高穗型质量,同时能有效防止早衰,延长叶片绿叶功能期,促进增粒、增重,提高单穗和群体的生产能力.

Comparative Trial of Amount of Booting Fertilizer of Wheat

Objective] The research aimed to explicit the effects of booting fertilizer and the optimum amount.Method] Leaves number of single stem was investigated after head sprouting 1 month,and the plant characters and panicle traits were sampled and measured before maturity.Result] The optimum amount of booting fertilizer was 97.5 kg/hm2 urea,followed by 120 kg/hm2 urea.When the amount of urea was inferior to 75 kg/hm2,the effect wasn＇t significant.When the amount of urea exceeded 120 kg/hm2,it was diseconomy,and caused the decrease of the application effect.Conclusion] The application of booting fertilizer could decrease the degeneration of spikelet and flower,increase the seed number of the spikelet,all-round improve the quality of ear type,effectively prevent premature senility,prolong the function period of the leaf,promote the increase of the grain weight,and enhance the production capacity of single ear and the group.