Abundance-deficiency Index of Soil Available Phosphorus and Modeling of Appropriate Phosphorus Fertilizer Application Rates for Buckwheat in China
GUO Binglin
SUN Hongren
WANG Xianguo
ZHANG Yunlong
WANG Zhenguo
Baiyilatu
ZHANG Guihua
WEN Feng
JIN Xiaoguang
BAO Xuelian
LIU Weichun
Abstract：In order to established a recommended P application system based on soil testing in China,a new study method for crop fertilizer recommendation based on abundance-deficiency index(ADI)of soil nutrients was used to study the ADI of soil available P(SAP)and appropriate P application rates(APAR)for buckwheat in China.The results showed that the concentration of SAP and the relative yield of buckwheat without P fertilizer treatment in China was y=10.352 lnx+58.085.The ADI of SAP for buckwheat in China for the 1st to 7th level were＞58,＞22～58,＞8.5～22,＞3.5～8.5,＞1.2～3.5,＞0.5～1.2 and ≤ 0.5 mg/kg,respectively.When the target yield(TY)of buckwheat was 0.9～3.75 t/hm2,the P fertilizer use efficiency(PFUE)was 15％～35％,and the SAP abundance-deficiency level(ADL)was from 1st to 7th,the APAR for ADL from 1st to 7th were 0,4～38,8～75,12～113,15～150,19～188 and 23～225 kg/hm2,respectively.The APAR for PFUE of 35％,30％,25％,20％and 15％were 0～96,0～113,0～135,0～169 and 0～225 kg/hm2,respectively.The APAR for TY of 0.90,1.50,2.25,3.00 and 3.75 t/hm2 were 0～54,0～90,0～135,0～180 and 0～225 kg/hm2,respectively.
Keywords：ChinaBuckwheatSoil testing and fertilizer recommendationAvailable phosphorusAbundance-deficiency indexFertilizer application rate
Publication Date：2024-08-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 18-23 )