中国草食动物科学2024，Vol.44Issue(4)：22-29,8.DOI:10.3969/j.issn.2095-3887.2024.00.060
关键生长期氮磷肥组合对本土老芒麦种子产量及萌发力的影响
The Effect of Nitrogen and Phosphorus Fertilizer Combinations on Seed Yield and Germination Ability of Native Elymus Sibiricus L During Critical Growth Period
摘要
Abstract
s:To explore the effects of nitrogen and phosphorus fertilizer combinations during the critical stages of nutri-tional and reproductive growth on the seed yield and germination ability of native Elymus sibiricus L in alpine area,dif-ferent nitrogen and phosphorus fertilizer topdressing combinations were designed during the tillering-jointing and heading-flowering stages of native Elymus sibiricus L,groupsⅠ,Ⅱ,Ⅲ,Ⅳ,and Ⅴ were treated with Urea+Urea=75 kg/hm2+75 kg/hm2,Urea+SSP=75 kg/hm2+150 kg/hm2,SSP+SSP=150 kg/hm2+150 kg/hm2,SSP+Urea=150 kg/hm2+75 kg/hm2,DAP+DAP=150 kg/hm2+150 kg/hm2,respectively,and group Ⅵ without topdressing.This paper studied their effects on seed yield,yield components,and seed germination ability of native Elymus sibiricus L.The results showed that the ap-plication of DAP+DAP(group Ⅴ),SSP+Urea(group Ⅳ),and Urea+SSP(group Ⅱ)fertilization combinations during the tillering-jointing stage and heading-flowering stage increased the potential seed yield,apparent seed yield,and measured seed yield of Elymus sibiricus L by increasing the number of panicles/plant,tillers,reproductive branches,spikelets per spike,seeds/spike,and small flowers/spike,and also improved the seed germination potential,germination index,and vitality index.Compared to the control,the seed yield of groups Ⅴ,Ⅳ,and Ⅱ increased by 569.21 kg/hm2,420.07 kg/hm2,and 363.05 kg/hm2,the seed germination potential increased by 27.13%,29.78%and 27.13%,the ger-mination index increased by 28.26%,19.37%and 23.51%,and the vitality index increased by 47.85%,44.19%and 49.51%,respectively.The seed yield of Elymus sibiricus L was significantly positively correlated with the number of spikes/plant,reproductive branches,tillers,spikelets/spike,flowers/spike and seeds/spike,and positively correlated with spike length and seed thousand grain weight.In summary,spikes/plant,tillers and reproductive branches are the main fac-tors affecting the seed yield of native Elymus sibiricus L.Timely topdressing N-P binary fertilizers or interactive applica-tion of N and P fertilizers from tillering to jointing stage and heading to flowering stage can significantly increase main seed yield factors of Elymus sibiricus L,enhance seed yield and improve its germination ability.关键词
氮磷施肥组合/本土老芒麦/营养生长期/生殖生长期/种子产量/产量组分/种子发芽力Key words
N-P fertilizer combination/native Elymus sibiricus L/vegetative growth stage/generative growth stage/seed yield/yield component/seed germination ability分类
农业科技引用本文复制引用
俞慧云,李智燕,李新媛,韩天虎,俞联平,孟祥君,陈兴荣,曾德智,王延,张贞明,任越..关键生长期氮磷肥组合对本土老芒麦种子产量及萌发力的影响[J].中国草食动物科学,2024,44(4):22-29,8.基金项目
甘肃省重点研发计划-农业类(21YF5NA033) （21YF5NA033）
甘肃省林业和草原科技项目(2021kj069) （2021kj069）
