摘要
采用田间试验,研究了在盐碱土壤条件下腐植酸、磷酸二铵及微量元素配施对紫花苜蓿(Medicago sativa L.)生长的影响,并采用灰色系统理论中的灰色关联度分析法对紫花苜蓿12个主要营养指标进行综合分析和评价。结果表明:以腐植酸、磷酸二铵和微量元素为主的底肥能有效增加紫花苜蓿全年干物质产量,平均增产达到39.6%;返青期追肥对产量影响不显著。施肥均能促进紫花苜蓿株高的增长,并且第一、二茬株高均大于第三茬。不同施肥处理下,紫花苜蓿营养价值加权关联度和等权关联度的结果一致,施肥处理的优劣顺序依次为T3(底肥)、T1(底肥+返青期追肥)、T2(返青期追肥)和T4(不施肥),T3在加权和等权综合评估关联度分别为0.2175和0.2156。
Field experiments were conducted to study the effect of combined application of humic acid,diammonium phosphate and microelement on alfalfa（Medicago sativa） growth, and to analyze and evaluate 12 main nutritive indexes by gray relational analysis grade method. The results showed that the total yield ofalfalfa increased by 39.6% with humic acid, diammonium phosphate and microelement applied as basefertilizer. Topdressing in seedling establishment period had little effect on yield. Fertilization could improveplant height of alfalfa, and the plant height in first cut and second cut was higher than that of third cut. Theresults of the weighted correlation degree and the equal right correlation degree of alfalfa nutrition were thesame under different treatments, the effect followed the order of T3（base fertilizer）, T1（base fertilizer ＋topdressing in seedling establishment period）, T2（topdressing in seedling establishment period） and T4（without fertilization）, the comprehensive evaluation correlation degree of weighted and equal relation were0.2175 and 0.2156 under T3 treatment.
出处
《中国农学通报》
2017年第29期66-71,共6页
Chinese Agricultural Science Bulletin
基金
山东省农业重大应用技术创新项目"黄河三角洲苜蓿施肥关键技术研究与示范"[鲁财农指(2015)16号]
国家牧草产业技术体系东营综合试验站(CARS-35)
山东省农业科学院农业科技创新工程"粮经饲种植模式优化及关键技术"(CXGC2016B03)
公益性行业(农业)科研专项"苜蓿高效种植技术研究与示范"(201403048)
山东省重点研发计划"盐碱地饲草新品种培育及绿色开发技术研究与示范(2016ZDJS10A04)
关键词
紫花苜蓿
施肥
产量
品质
盐碱地
alfalfa
fertilization
yield
quality
saline-alkali soil
