Effects of Commercial Organic Fertilizer Replacing Partial Chemical Fertilizer on Maize Growth,Yield and Soil Fertility

【Objective】 This project aims to study the effects of commercial fertilizer replacing partial chemical fertilizer on the maize growth,yield,soil fertility and economic benefits in the hope of providing a feasible basis for its the application in maize production. 【Method】 Three treatments were set up,no fertilization control (CK),conventional fertilization (NPK),commercial organic fertilizer + chemical fertilizer (MNPK) based on equivalent N,P,K rate,in which the chemical N,P and K replacement ratios were 10.0%,18.3%,and 15.0%,respectively,and after that, the field plot experiments and indoor analysis were carried out. 【Result】 The substitution of commercial organic fertilizer for part of chemical fertilizer (MNPK) increased the plant height, basal stem diameter, leaf number and leaf SPAD value of maize at different growth stages compared with conventional fertilization (NPK) and non-fertilization control (CK). The ear traits and yield components of maize were improved effectively. Maize yield increased by 83.47%,net income increased by 419.58 yuan/hm². The contents of soil alkaline N,available P,available K and organic matter increased by 13.08%-39.29%,71.97%-95.70%,13.29%-45.13% and 20.00%-23.26%, respectively. Finally, the soil moisture, soil pH and soil bulk density decreased. 【Conclusion】 Replacing part of chemical fertilizer with organic fertilizer is an economical and feasible fertilization method for promoting maize growth,increasing yield and lifting efficiency and fertilizing soil.