Effects of Pig Manure Straw Compost Instead of Chemical Fertilizer on Key Enzymes of Carbon Metabolism,Yield,and Quality of Spring Maize
To clarify the regulatory effect of pig manure straw compost replacing chemical fertilizer on carbon metabolism of spring maize,and determine the proportion of pig manure straw compost replacing chemical fertilizer.Conduct field experiments in Songyuan City,Jilin Province.Using a split zone experimental design,two levels of pig manure straw compost application were set in the main area,and three levels of compost substitution for chemical fer-tilizer were set in the sub area to explore the effects of pig manure straw compost substitution for chemical fertilizer on carbon metabolism,yield,and quality of spring maize.The results showed that as the proportion of compost replacing chemical fertilizers increased,the carbon metabolism level of corn gradually increased,and the yield and quality of corn gradually improved.The C2F2 treatment performed the best,and compared with the F0 treatment,the PEP car-boxylase activity and RUBP carboxylase activity of spring corn increased by 29.69％and 19.03％,respectively.The production increased by 18.6％.The content of starch,crude protein,and fat increased by 6.73％,12.90％,and 14.24％,respectively.In summary,applying 20 000 kg/ha of pig manure straw compost instead of 20％chemical fer-tilizer can significantly improve the activity of key enzymes in carbon metabolism,yield,and quality of spring maize.
Spring maizeCompostingCarbon metabolismYieldQuality
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