Effects of Partial Substitution of Chemical Fertilizers by Organic Materials on Soil Labile Organic Matter and Carbon Pool Management Index
ZHANG Yujun
DONG Shigang
LIU Shiliang
JIANG Guiying
ZHANG Hong
LI Ying
GUO Doudou
HUANG Shaomin
SHEN Fengmin
Abstract：The field experiments were carried out to explore the optimum ratio of organic material to substitute chemical fertilizer in Fluvo-aquic soil in Henan province by analyzing the effects of different organic materials displacing different ratios of chemical fertilizer on the total organic matter (TOC),different labile organic matter (LOM) and carbon pool management index (CPMI).The results showed that the TOC was obviously elevated under different treatments with organic materials,and the highest increment was 14.25％ under the treatment of straw substituting 40％ chemical fertilizer(S3).It was more effective on promoting the moderately and lowly LOM content under straw only and straw combined with cattle manure substitution treatments.The higher CPMI value of different LOM was showed under the straw combined with cattle manure substitution treatments.The highest CPMI of highly LOM was 175.7 in the treatment of straw combined with cattle manure substituting 40％ chemical fertilizer (MS3).The highest CPMI of moderately LOM was 407.7 in the treatment of 100％ chemical fertilizer combined with straw and cattle manure (MS4).The highest CPMI of lowly LOM was 533.7 in the treatment of straw combined with cattle manure substituting 30％ chemical fertilizer(MS2).Generally,substitution of partial chemical fertilizer by different organic material could effectively improve the TOC,LOM and CPMI.Among the different substitution ratios,substitution of 30％-40％ chemical fertilizer by straw and cattle manure together was the optimum ratio in Henan province.
Keywords：Chemical fertilizerStrawCattle manureSoilLabile organic carbonCarbon pool management index
Publication Date：2018-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：5( 43-47 )