摘要
为探究生物炭和氮肥配施对豆禾间作草地牧草农艺性状和营养成分的调控效应,本研究以紫花苜蓿(Medicago sativa L.)与无芒雀麦(BromusinermisLeyss.)间作草地为研究对象,通过随机区组试验设计,设置生物炭[B_(0)(0t·hm^(-2))和B_(8)(8 t·hm^(-2))]与氮肥[N_(0)(0 kg·hm^(-2))、N_(120)(120 kg·hm^(-2))、N_(180)(180 kg·hm^(-2))]处理,系统分析生物炭与氮肥配施对其农艺性状和营养成分的影响。结果表明:生物炭与氮肥(B_(8)N_(120)和B_(8)N_(180))配施提高了初花期和盛花期间作系统鲜干比和株高,对紫花苜蓿的茎叶比、茎节数和节间长均无显著影响,而B_(8)N_(225)则抑制盛花期鲜干比。与B_(0)N_(0)相比,B_(0)N_(120)和B_(0)N_(180)处理下,紫花苜蓿一级分枝数分别在初花期和盛花期提高21.28%,19.74%和28.31%,14.56%(P<0.05),但B_(0)N_(225)处理未表现出增效作用,生物炭配施进一步放大了氮肥的促进作用。无芒雀麦的株高和分蘖数均表现为“低氮促进、高氮抑制”的规律。B_(8)N_(120)与B_(8)N_(180)增加了间作系统粗蛋白和粗脂肪含量,降低了中性洗涤纤维和木质素含量。综上,生物炭与氮肥(B_(8)N_(180))配施能够有效地改善紫花苜蓿-无芒雀麦间作系统的农艺性状和营养品质。
To explore the regulatory effects of combined application of biochar and nitrogen fertilizer on the agro-nomic traits and nutritional components of leguminous-grass intercropping pastures,in this study the intercrop-ping pasture of alfalfa(Medicago sativa L.)and bromegrass(Bromus inermis Leyss.)were taken as the research object.Through a randomized block experimental design,treatments of biochar[B_(0)(0 t·hm^(-2)),B_(8)(8 t·hm^(-2))]and nitrogen fertilizer[N_(0)(0 kg·hm^(-2)),N_(120)(120 kg·hm^(-2)),N_(180)(180 kg·hm^(-2))]were set up to systematically analyze the effects of combined application of biochar and nitrogen fertilizer on their agronomic traits and nutritional components.The results showed that the combined application of biochar and nitrogen fer-tilizer(B_(8)N_(120) and B_(8)N_(180))significantly increased the fresh-to-dry ratio and plant height during the early and peak flowering periods of the system.It had no significant effect on the stem-to-leaf ratio,stem and internode length of alfalfa.However,B_(8)N_(225) inhibited the fresh-to-dry ratio during the peak flowering period.Compared to B_(0)N_(0),the first-order branch numbers of alfalfa under B_(0)N_(120) and B_(0)N_(180) treatments increased by 21.28%,19.74%,28.31%and 14.56%,respectively,at the early flowering stage and the peak flowering stage(P<0.05).However,the B_(0)N_(225) treatment had no an additive effect.The addition of biochar further amplified the promoting effect of nitrogen fertilizer.The plant height and tillering number of smooth bromegrass also exhib-ited a pattern of“low nitrogen promotion and high nitrogen inhibition”.B_(8)N_(120) and B_(8)N_(180) increased the crude p rotein and crude fat contents of the intercropping system,and reduced the content of neutral detergent fiber and lignin.In summary,the combination of biochar and nitrogen fertilizer(B_(8)N_(180))can effectively improve the agro-nomic traits and nutritional quality of the alfalfa-snowdrop wheat intercropping system.
作者
王召明
陈翔
赵杰
赵晨
邱雯婧
付娟娟
张晓严
谢海桃
魏荣博
WANG Zhao-ming;CHEN Xiang;ZHAO Jie;ZHAO Chen;QIU Wen-jing;FU Juan-juan;ZHANG Xiao-yan;XIE Hai-tao;WEI Rong-bo(M-Grass Ecology and Enviroment(Group)Co.,Ltd.,Hohhot,Inner Mongolia 010010,China;Ulagai Meadow Steppe Ecosystem Field Scientific Observation and Research Station in Inner Mongolia Autonomous Region,Xilin Gol,Inner Mongolia 026000,China;Department of Grassland Science,College of Grassland Agriculture,Northwest A&F University,Yangling,Shaanxi Province 712100,China)
出处
《草地学报》
北大核心
2025年第6期1982-1990,共9页
Acta Agrestia Sinica
基金
内蒙古自治区“英才兴蒙”工程团队项目:“三北”区域生态修复乡土草种应用集成技术研发与示范推广
毛乌素沙地沙化土地近自然修复技术集成与示范项目(2024JBGS00200504)资助。
关键词
生物炭
氮肥
间作系统
生产性能
Biochar
Nitrogen fertilizer
Intercropping system
Production performance
作者简介
王召明(1969-),男,蒙古族,内蒙古呼和浩特人,学士,正高级工程师,主要从事草地修复方向研究,E-mail:mckh@163.com;通信作者:陈翔,E-mail:531740713@qq.com。
