氮磷钾不同配施对三峡库区桂牧1号杂交象草生产性能的影响  

Effect of Nitrogen,Phosphorus and Potassium Ratio of Fertilizer on Production Performance of Penniaetum urpureum cv.Guimu-1 in the Three Gorges Reservoir Area

作　　者：高武超 冉启凡 何玮[1,2,3] 徐远东 范彦[1,2,3] 张健 Gao Wuchao;Ran Qifan;He Wei;Xu Yuandong;Fan Yan;Zhang Jian(Chongqing Academy of Animal Science,Chongqing 402460,China;Yunyang ExperimentalStation of China Grassland Research System,Yunyang 404500,China;Chongqing Engineering Research Center For Grassland,Chongqing 400015,China;Sichuan Province General Grassland Workstation,Chendu 610036,China)

机构地区：[1]重庆市畜牧科学院,重庆402460 [2]国家牧草产业技术体系云阳综合试验站,重庆云阳404500 [3]重庆市草业工程中心,重庆400015 [4]四川省草原工作总站,四川成都610036

出　　处：《草学》2022年第2期49-53,共5页Journal of Grassland and Forage Science

基　　金：现代农业产业技术体系建设专项资金—国家牧草产业技术体系(CARS-34)资助。

摘　　要：针对三峡库区主推牧草桂牧1号杂交象草规模化种植中肥料利用率低,施肥量和施肥配比不确定等问题,本文通过部分“3414”配方施肥设计,并结合理论优化模型及计算机模拟寻优技术,筛选出桂牧1号杂交象草在库区最佳施肥配比。结果表明:合理氮、磷、钾配比施肥对桂牧一号杂交象草生产性能有较好的影响,产量增产幅度达13.09%~29.38%。组合N_(3)P_(2)K_(2)施肥效果最佳,产量达185155.56kg·hm^(-2),株高、叶长和茎叶比最高,分别为271.7cm、120.48cm、0.86。通过模拟寻优分析得到,最优施肥配比为氮含量361.2kg·hm^(-2),磷含量157.2kg·hm^(-2),钾含量101.2kg·hm^(-2);最优施肥配比区为氮含量359.8~362.6kg·hm^(-2),磷含量156.6~157.8kg·hm^(-2),钾含量100.4~102kg·hm^(-2),产草量为183841.15~185982.3kg·hm^(-2)。The objective of this study aimed to evaluate the effect of fertilization on production performance of Penniaetum urpureum cv.Guimu-1 under different fertilization levels in the three gorges reservoir area.The results showed that good comprehensive production performance was obtained via optimization of nitrogen,phosphorus and potassium ratio of fertilizer,with yield increased by 13.09%to 29.38%.The fertilizer combination of N_(3)P_(2)K_(2) had the best fertilization effect of plant height,leaf length,stem:leaf ratio and yield,at 271.7cm,120.48cm,0.86 and 185155.56kg·hm^(-2),respectively.The simulation optimization analysis demonstrated that recommendation of fertilizer rates was given as N 361.2kg·hm^(-2),P 157.2kg·hm^(-2),K 101.2kg·hm^(-2) respectively.The ranges of optimal fertilization were N 359.8~362.6kg·hm^(-2),P 156.6~157.8kg·hm^(-2),K 100.4~102kg·hm^(-2) and the ranges of optimal yield were 183841.15~185982.3kg·hm^(-2).

关 键 词：桂牧1号杂交象草 产量 配方施肥 

分 类 号：S54.062[农业科学—作物学]