植物营养与肥料学报2025，Vol.31Issue(4)：774-788,15.DOI:10.11674/zwyf.2024425
铵硝配比对芒果幼苗不同养分吸收特征的影响
Effects of ammonium-nitrate ratios on the nutrient absorption characteristics of mango(Mangifera indica L.)
摘要
Abstract
[Objectives]The ammonium-nitrate ratio is an important factor to affect the nutrient absorption of mango(Mangifera indica L.).The ammonium nitrogen(AN),nitrate nitrogen(NN),P,K,Ca,and Mg uptake of mango with varied ammonium-nitrate ratios was explored,aiming to screen the most suitable ammonium-nitrate ratio and provide a basis for rational fertilization in mango.[Methods]An hydroponic experiment was conducted using mango seedlings of cultivar'Golek'as test materials.Based on the Hoagland nutrition solution,five ammonium-nitrate ratios was setup,i.e.0∶1(T1),3∶7(T2),1∶1(T3),7∶3(T4),and 1:0(T5).The mango seedlings had cultured for 48 h under no nitrogen supply before grown in the treatment nutrient solutions.At 0,1,2,3,4,6,8,10,12,and 24 hours of culture,nutrient solution samples were collected for determination of ammonia,nitrate,total nitrogen(TN),P,K,Ca,and Mg concentrations.Michaelis-Menten kinetics equations were adapted to measure the kinetic parameters of the ion uptake.[Results]The absorption pattern of NO3-,NH4+,and TN uptake by mango root followed the Michaelis-Menten kinetics equation under different ammonium-nitrate ratios.The maximum absorption rate,affinity and flow velocity of NO3-were higher than those of NH4+under all treatments,while the absorption capacity and poorness-resistance of NO3-were higher than those of NH4+under T4 treatment.The flow rate of NO3-and NH4+continued change with the prolongation of ammonium-nitrate ratios and NO3-changed more easily than NH4+under T2,T3,and T4,whereas the maximum absorption rate and flow rate of TN continued reducing,and the affinity,absorption capacity and poorness-resistance of TN were highest at T3 treatment.The absorption rates of NO3-and NH4+by the mango roots treated with different ammonium-nitrate ratios increased first and then decreased with the extension of culture time,while the absorption rates of H2PO4-,K+,Ca2+,and Mg2+continued to decrease and tended to stabilize at 10 h.Additionally,the affinity of K+and Ca2+as well as the poorness-resistance of H2PO4-,K+,Ca2+,and Mg2+were highest at T1;the maximum absorption rate and absorption capacity of K+reached the peak at T2;the affinity and absorption capacity of H2PO4-were highest at T3;and the maximum absorption rate of H2PO4-,Ca2+and Mg2+,the affinity of Mg2+,the absorption capacity of H2PO4-and Mg2+,and flow rate of H2PO4-,K+,Ca2+and Mg2+reached their maximums at T5.[Conclusions]Mango has a preference for absorbing NO3-,however,the combined application of ammonia and nitrate nitrogen is more conducive to the absorption of N and other nutrients by mango.In order to improve the absorption of P,Ca,and Mg,phosphate,calcium,and magnesium fertilizers should be applied in conjunction with an appropriate amount of ammonium nitrogen fertilizer in mango production.关键词
芒果/铵硝比/养分/动力学参数/吸收能力Key words
Mangifera indica/ammonium-nitrate ratio/nutrients/kinetic parameter/absorption capacity引用本文复制引用
陈蓉,杨杰,陈盖洵,凡超..铵硝配比对芒果幼苗不同养分吸收特征的影响[J].植物营养与肥料学报,2025,31(4):774-788,15.基金项目
广东省重点领域研发计划"现代种业"重大专项(2022B0202070002) （2022B0202070002）
2023年省级乡村振兴战略专项—种业振兴行动项目(2023-NBH-00-013). （2023-NBH-00-013）
