氮肥分施对多花黑麦草生长及种子产量的影响  

Effect of Nitrogen Application on Seed Yield and nitrogen utilization efficiency of Italian Ryegrass

作　　者：薛正帅[1] 江生泉[1] 江文林 XUE Zheng-shuai;JIANG Sheng-quan;JIANG Wen-lin(Food And Environmental Engineering Department,Chuzhou Vocational and Technical College,Chuzhou 239000,Anhui,China;Anhui Green Spring Ecological Agriculture Co.,Ltd,Chuzhou 239000,Anhui,China)

机构地区：[1]滁州职业技术学院食品与环境工程学院,安徽滁州239000 [2]安徽绿泉生态农业股份有限公司,安徽滁州239000

出　　处：《贵阳学院学报（自然科学版）》2021年第4期77-79,86,共4页Journal of Guiyang University：Natural Sciences

基　　金：“园林工程技术”校级专业学科带头人(项目编号:ZD2021002)。

摘　　要：氮素是影响多花黑麦草生长发育的重要因素,研究了保留同一施氮总量下不同施肥时间和浓度对多花黑麦草生长发育及种子产量的影响。结果表明:不同氮肥处理的多花黑麦草生长发育指标和种子产量存在差异,处理50 Nkg/hm^(2)(秋季)+50 Nkg/hm^(2)(冬季)+50 Nkg/hm^(2)(春季)和50 Nkg/hm^(2)(秋季)+0 Nkg/hm^(2)(冬季)+100 Nkg/hm^(2)(春季)的生长指标表现最佳;各处理的生物量存在差异,其中以处理50 Nkg/hm^(2)(秋季)+50 Nkg/hm^(2)(冬季)+50 Nkg/hm^(2)(春季)的总生物量和生殖枝生物量最大,其生殖生长与营养生长的比值为2.3,与其他处理的差异达到显著水平(P<0.05);种子产量以处理50 Nkg/hm^(2)(秋季)+50 Nkg/hm^(2)(冬季)+50 Nkg/hm^(2)(春季)最大,为1583.0 kg/hm^(2),与其他处理的差异达到显著水平(P<0.05),以上结论为多花黑麦草种子生产的氮肥管理提供理论基础。Nitrogen is an important factor affecting the growth and development of Lolium multiflorum.The effects of different fertilization time and concentration on the growth and development of Lolium multiflorum and seed yield under the same total amount of nitrogen application were studied.The results showed that the growth and development indexes and seed yield of Lolium multiflorum treated with different nitrogen fertilizer were different,and the growth indexes of 50 N kg/hm^(2)(Autumn)+50 N kg/hm^(2)(winter)+50 N kg/hm^(2)(spring)and 50 N kg/hm^(2)(Autumn)+0 N kg/hm^(2)(winter)+100 N kg/hm^(2)(spring)were the best.The biomass of each treatment was different,among which the total biomass and reproductive branch biomass of treatment 50N kg/hm^(2)(Autumn)+50 N kg/hm^(2)(winter)+50N kg/hm^(2)(spring)were the largest,and the ratio of reproductive growth to vegetative growth was 2.3,which was significantly different from other treatments(P<0.05).The seed yield of the treatment of 50 N kg/hm^(2)(Autumn)+50 N kg/hm^(2)(winter)+50 N kg/hm^(2)(spring)was the largest,which was 1583.0 kg/hm^(2).The difference between the treatment and other treatments was significant(P<0.05),The above conclusions provided theoretical basis for nitrogen management of ryegrass seed production.

关 键 词：氮肥 多花黑麦草 种子产量 分施 

分 类 号：S732[农业科学—林学]