摘要
为进一步完善赣南脐橙园水肥一体化条件下的有机无机液肥配施技术方案,本研究于2020年,基于等氮施用条件下通过多次人工浇灌水肥方式开展水肥一体化盆栽模拟试验,试验设6个处理,包括不施肥处理(CK),有机肥氮替代0%(T1)、30%(T2)、50%(T3)、70%(T4)及100%(T5)的化学氮,研究等氮条件下有机无机液肥配施对脐橙幼树生长发育、氮素积累及土壤特性的影响。结果表明,随着有机肥施用比例的增加,幼树总干物质量、根冠比、总氮素积累量及其利用率均呈先上升后下降的变化趋势,在T2时达最高;与T2相比,T1处理总干物质量显著下降16.5%,而有机液肥施用处理间(T2~T5)差异不显著。同时,提高有机肥配施比例有利于不同土层土壤pH值、有机碳及其组分含量、酶活性、微生物数量的增加,而土壤电导率(EC)、碱解氮、速效钾含量随有机肥配施比例增加均呈先上升后下降趋势。综上可知,水肥配施条件下,短期内30%有机肥氮与70%化肥氮配施有利于协同提高脐橙幼树干物质生产和氮素吸收,而较高的有机肥配施比例则更有利于土壤特性的提升。本研究为丘陵山地赣南脐橙园有机液肥应用及水肥一体化标准化建设提供了理论依据。
This study aimed to further improve the technical scheme of combined application of organic and inorganic liquid fertilizers under integrated water and fertilizer management in Gannan navel orange orchard.In 2020,a pot experiment simulating water-fertilizer integration was carried out by times of artificial pouring water and fertilizer under the equal nitrogen input.Six treatments were established,including a control group with no fertilizer(CK),and chemical nitrogen substitution with organic fertilizer nitrogen at 0%(T1),30%(T2),50%(T3),70%(T4),and 100%(T5),to assess the impact of the combined application of organic and inorganic liquid fertilizers on the growth and development,nitrogen accumulation of navel orange saplings,and soil characteristics under equal nitrogen input.The results showed that,with increasing organic fertilizer proportion,the total dry biomass,root-shoot ratio,total nitrogen accumulation and nitrogen use efficiency showed a trend of initially increased and then decreased,and peaking at T2.Specifically,T1 showed a significantly decrease by 16.5%in total dry biomass compared to T2,while no significant differences were observed among T2 to T5.At the same time,higher the ratio of organic fertilizer application was beneficial to the increase of soil pH,organic carbon and its component content,enzyme activity and microbial number in different soil layers,while the contents of soil electrical conductivity(EC),alkaline-hydrolyzable nitrogen,and available potassium were increased first and then decreased with the increasing of organic fertilizer proportion.In conclusion,under integrated water and fertilizer conditions,combining application of 30%organic fertilizer nitrogen with 70%chemical fertilizer nitrogen synergistically improved the dry matter production and nitrogen uptake of navel orange saplings,while a higher organic fertilizer proportion more effectively improved soil properties in the short-term.This study provides a theoretical basis for the application of organic liquid fertilizers and the standardization of water and fertilizer integration in Gannan navel orange orchards in hilly and mountainous areas.
作者
肖赢
成臣
赖金平
庄霞
刘桂东
姚锋先
周高峰
XIAO Ying;CHENG Chen;LAI Jinping;ZHUANG Xia;LIU Guidong;YAO Fengxian;ZHOU Gaofeng(Life Sciences College,Gannan Normal University/National Navel Orange Engineering Research Center,Ganzhou,Jiangxi 341000)
出处
《核农学报》
北大核心
2025年第9期2031-2039,共9页
Journal of Nuclear Agricultural Sciences
基金
国家自然科学基金项目(32160763)
江西省重点研发计划项目(20223BBF61008)
江西省自然科学基金项目(20232BAB215042)。
关键词
有机液肥
水肥一体化
有机无机配施
赣南脐橙园
土壤特性
organic liquid fertilizer
water-fertilizer integration
combined application of organic and inorganic fertilizers
Gannan navel orange orchard
soil characteristics
