施肥处理对南方青贮玉米产量和植株性状的影响  

Effects of different fertilizing on biomass yield and plant characters of silage maize in southern China

作　　者：方勇[1] 程林润 朱璞 俞金龙 

机构地区：[1]浙江金华职业技术学院,浙江金华321007 [2]浙江金华市农科院,浙江金华321007

出　　处：《草业科学》2010年第3期98-101,共4页Pratacultural Science

基　　金：金华市科技局自然科学科研项目(2007-2-043)

摘　　要：通过田间小区试验,研究了氮磷钾配合施用对青贮玉米Zea mays产量和植株性状的影响。结果表明,各施肥处理对青贮玉米生育性状的影响与不施肥相比都有明显的变化,随着氮肥使用量增加,其生育期、收获期有所推迟,而磷、钾肥对生育期影响不大;增施氮肥能够促进青贮玉米的生长发育,但氮肥过多(尿素360 kg/hm2)易引起倒伏,而钾肥有助于增强抗倒伏能力;试验结果也表明,适当增施氮肥,补充钾肥,有利于提高青贮玉米的生物产量,其生物产量和平均单株质量随施氮肥量增加而增加,产量呈先上升后下降趋势。The effects of applying nitrogen, phosphorus and potassium fertilizers on the yield and growth performance of silage maize were studied with field plot experiment and the results showed that the growth of silage maize was obviously improved by fertilization. With the increase of nitrogen application, the growth stage and harvest time were postponed while phosphorus and potassium fertilizers have little effect on the growth period. The application of nitrogen fertilizer promoted the growth of silage maize, but higher application （urea 360 kg/hm^2） could easily cause lodging. Potassium fertilizer could improve the lodging resistance. The yield of silage maize could be increased by proper application of nitrogen and potassium fertilizers.

关 键 词：青贮玉米 生物产量 植株性状 肥效试验 

分 类 号：S54[农业科学—作物学] S513