辽北地区控根育苗移栽玉米与紫花苜蓿间作可行性研究

目的]研究辽宁地区玉米与紫花苜蓿间作的可行性。方法]设置玉米、紫花苜蓿单作和间作3种种植方式,间作玉米采用控根育苗移栽,测定玉米和紫花苜蓿的株高、产量。结果]间作玉米缓苗期、株高较低于单作,但抽穗后两者的株高差异不显著。间作紫花苜蓿的株高低于单作。1年生苜蓿与玉米相互间形成了一个相对合理的参数,两者的实际高度相近时,紫花苜蓿具有较好的收获量,可以刈割。间作玉米产量达12 190.5 kg/hm2,比单作玉米低11.4%,经济系数显著高于单作玉米。间作苜蓿的产量低于单作,但可以多次循环刈割。结论]玉米、苜蓿间作增加了单位面积土地的生物量和产值,提高了综合效益,促进了辽北地区农业生态良性发展。

Feasibifity Research of Intercropping Corn Transplanted with Seedling Cultivation and Root Control and Alfalfa in North Liaoning

Objective] The purpose was to study the feasibility of intercropping corn with alfalfa in Liaoning area.Method] 3 kinds of planting modes of monoculture and intercropping of corn and alfalfa were set,intercropped corn was transplanted with seedling cultivation and root control and the plant height and yield of corn and alfalfa were determined.Result] Intercropped corn had seedling recovery period with plant height lower than that of monoculture corn,but their plant height difference was not significant after tasselling.The plant height of intercropped alfalfa was lower than that of monoculture alfalfa.A relatively reasonable parameter was formed between 1-year-old alfalfa and corn.When their practical heights were close,the alfalfa had better harvest yield and could be harvested.The yield of intercropped corn reached 12 190.5 kg/hm2,11.4% lower than that of monoculture corn,with significantly higher economic coefficient than that of monoculture corn.The yield of intercropped alfalfa was lower than that of monoculture alfalfa,but could be harvested periodically for many times.Conclusion] Intercropping of corn and alfalfa increased biomass and yield value of land with per unit area,and enhanced comprehensive benefit.The study changed traditional cultivation mode of corn and promote ecological and sound development of agriculture in north Liaoning.