Optimization of fertilizer performances in long-term garlic cropping soils  

作　　者：Tianqi WEI Hongmei ZHOU Huayang HONG Yanyun REN Qin LIU Yanhua SU 

机构地区：[1]Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008(China) [2]University of Chinese Academy of Sciences,Beijing 100049(China) [3]University of Chinese Academy of Sciences,Nanjing,Nanjing 211135(China) [4]Jining Academy of Agricultural Sciences,Jining 272100(China) [5]College of Forestry,Nanjing Forestry University,Nanjing 210037(China)

出　　处：《Pedosphere》2024年第3期577-589,共13页土壤圈（英文版）

基　　金：supported by the 14th Five-Year Plan Innovation Program of the Institute of Soil Science,Chinese Academy of Sciences(No.ISSASIP2201)。

摘　　要：Continuous cropping is a common pattern of modern agriculture that takes regional advantages for crop yield profits.Along the progress of mono-cropping continuously supported by intensive fertilizer inputs,such a cropping pattern often undergoes serious problems with low fertilizer use efficiencies and unsustainable crop production.In this study,we dealt with a>25-year continuous garlic cropping system as an example for a problem-solving investigation.These garlic cropping soils underwent problems characterized by loss of soil organic matter,dramatic retention of NH_(4)^(+)-N,and excess accumulation of phosphate and potash chemicals.Through hydroponic simulations,we revealed that the presence of NH_(4)^(+)-N inhibited the root uptake of NO_(3)^(-)-N and K by 68% and 88%,respectively.Despite the traditionally emphasized importance of K,we observed the negative effect of high K on the growth of garlic roots.Further field experiments demonstrated that P and K applications can be reduced by 60% and 50%,respectively,without loss of yield.We thus developed a high-performance fertilization strategy by integrating a recomposed NPK fertilizer formulation to reduce unnecessary P and K inputs,a supplementary application of long-lasting C of woody peat to compensate for the soil C loss,and a foliar K approach to strengthen the stomatal function improvement with K.This strategy allowed a 15% increase of garlic yield and a seasonal soil C profit of ca.1.8 Mg ha^(-1)even at ca.30% lower fertilizer cost.This study would be helpful in managing garlic fertilization and developing compound fertilizers,with broader significance for other long-term cropping soils.

关 键 词：fertilization strategy fertilizer input field validation hydroponic simulation optimized fertilization soil nutrient balance yield profit 

分 类 号：S633.4[农业科学—蔬菜学]