植物营养与肥料学报2024，Vol.30Issue(3)：605-614,10.DOI:10.11674/zwyf.2023425
长期不同有机肥替代比例对茶园土壤养分动态的影响
Effects of long-term different substitution rates of organic fertilizers on soil nutrient dynamics in tea plantations
摘要
Abstract
[Objectives]Substitution of partial chemical fertilizer nitrogen(N)with organic fertilizers is promoted for the sustainable development of tea plantation.We investigated the effects of different organic substitution rates(OSRs)on soil nutrient changes and tea yields for the optimization of fertilization strategy.[Methods]The research based on a positioning tea fertilization experiment,located in Ningde City,Fujian Province,started since 2017,in which the tea trees were planted in 2016.Eleven soil samplings were conducted within one production year(2018-2019)in the treatment plots of no nitrogen fertilizer control(CK),pure chemical fertilizer(NPK),and the plots of substitution of 25%,50%,75%and 100%of chemical fertilizer with pig manure compost(denoted as OM25,OM50,OM75,and OM100).Soil pH,and nutrient contents were measured,and the precipitations,ground surface temperatures,and tea yields were investigated at the same time.[Results]All the fertilization treatments significantly increased soil nutrient contents,however,the coefficient of variation(CV)of soil nutrient contents increased with the enhanced organic substitution rate.Except for NH4+-N,OM25 and NPK treatment were recorded similar soil nutrient contents and CVs,which were lower than in the other treatments.The average NH4+-N content in OM25 treatment was 1.42-3.35 times higher than that in the other treatments(P<0.05).The annual CVs of NO3--N content exceeded 150%under the OM50-OM100 treatments,and no significant differences existed in the CVs among them.High OSRs increased the average contents of available Ca,Mg,Mn,Cu and Zn.The average available Ca,Mg,Mn,Cu and Zn contents in OM100 were 4.12,13.83,2.77,12.32 and 36.32 times of those in CK and OM25.With the increase of OSRs,surface soil pH and readily available K content increased,while NH4+-N content and fresh tea leaf yield decreased.Except for NH4+-N,soil nutrient contents were negatively correlated with precipitations at 7 days before sampling,and soil mineral N content was negatively correlated with surface temperature at any stage.[Conclusions]Application of 100%organic fertilizer is not conducive to tea yield and soil nutrient supply due to the resulted high soil pH.Excessive rainfall and high surface temperature also exaggerate the unbalanced supply of soil nutrients.Low organic substitution rate could guarantee ampler and stable mineral nitrogen supply,and would not change soil pH in tea plantations,so is suitable for the growth of tea trees.关键词
茶园/有机肥替代比例/养分动态/天气变化Key words
tea plantation/organic fertilizers substitution rate/nutrient dynamics/weather variation引用本文复制引用
季凌飞,杨亦扬,倪康,吴志丹,江福英,尤志明,伊晓云,郭世伟,阮建云..长期不同有机肥替代比例对茶园土壤养分动态的影响[J].植物营养与肥料学报,2024,30(3):605-614,10.基金项目
福建省属公益类科研院所基本科研专项(2022R1029006,2023R1027001) （2022R1029006,2023R1027001）
国家茶叶产业技术体系项目(CARS 23). （CARS 23）
