摘要： 为建植高产优质苜蓿草地提供科学依据,2003年在内蒙古西辽河平原灰色草甸土上,采用"3414"二次回归最优设计试验方案,研究N、P、K肥配施对紫花苜蓿(Medicago sativa)阿尔冈金当年鲜草产量和营养成分的影响,结果表明:施N 3.37 kg/hm²,施P₂O₅55.61 kg/hm²,施K₂O 256.63 kg/hm2时可获得鲜草最高产量77 944 kg/hm²。14个处理组合中,初花期以处理8(N₂P₂K₀)、处理10(N₂P₂K₃)粗蛋白的含量高;初花期的粗纤维含量小于25.0%的处理组合是处理7(N₂P₃K₂)、处理8(N₂P₂K₀),均达到国家一级标准[1];初花期粗灰分含量处理8(N₂P₂K₀)最低;此项研究可为通辽地区种植阿尔冈金提供合理的施肥方案,在增产的基础上获得优质牧草。

关键词: 施肥, 营养成分, 产量, 紫花苜蓿

Abstract: Using 3414 quadratic regression optimum design, the effects of N, P, K mixed fertilizing on fresh forage yield and nutriention of Argangjing alfalfa( Medicago sativa cv.Argangjing)was studied in gray meadow soil of West Liao Rever Plain of Inner Mengoulia Autonomous Region in 2003.The result showed that the optimum combination of N, P, K wasN: 3.37 kg/ hm², P₂O₅ : 55?61 kg/ hm ², K₂ O: 256.63 kg/ hm²and the fresh forage yield of alfalfa was 77 944 kg/ hm². In the 14 treatments, the contents of crude nitrogen of treatment 8 and treatment 10 were higher, and the contents of crude fiber in the treatment 7 and treatment 8 were low down 25% at early blooming stage and the contents of crude protein and crude fiber reached the 1st level of the state's standards.The content of crude ash was lower in the treatment 8 at early blooming stage.This study gived a rational fertilizing program for planting Argangjing alfalfa in theTongliao area, achieving high quality forage on the basis of increase yield.

Key words: Fertilization, Nutriention, Yield, Alfalfa

中图分类号: 

• S551+.7