Effects Of Monosodium Glutamate Residue On Yield,Quality And Environment Of Rice

In rice production,excessive application of chemical fertilizer often results in negative effects on economy and environment.In order to solve the problem effectively,the reduction of chemical fertilizer and the measures of substitute application can be used to study the environmental effects of chemical fertilizer reduction on rice yield,quality and production,which can provide a theoretical basis for the selection of scientific rice production.It is of great significance to realize the sustainable development of agriculture.In this paper,the combination of field dynamic monitoring and indoor laboratory analysis is adopted.Five treatments were set up: no fertilization(CK),conventional fertilization(CF),20% nitrogen reduction fertilization(N80%),50% substitution of monosodium glutamate residue(GM50%)and 100% substitution of monosodium glutamate residue(GM100%).Greenhouse gases in paddy fields were collected by gas static box method.the warming potential and emission intensity of greenhouse gases under different fertilization measures were studied.the yield and quality of rice were measured and the ecosystem service value of different treatments was calculated.The effect of monosodium glutamate residue combined with chemical fertilizer on rice yield and quality and greenhouse gas emission from paddy field was clarified in order to provide reference for reasonable reduction of chemical fertilizer,reduction of environmental impact of agricultural production and promotion of cleaner production of rice industry in monosodium glutamate industry.The main conclusions of the experiment are as follows:1.Nitrogen fertilizer reduction had no significant effect on rice yield,yield components and rice quality.Compared with CF,N80% decreased rice yield by 9.19%,but the difference was not statistically significant(P<0.05),but had no significant effect on yield components and rice quality.Compared with N80%,the yield of GM100% and GM50% treatments increased by 4.41% and 7.66%,respectively,but the difference was not statistically significant.The application of MSG residue had no significant effect on rice quality.2.Nitrogen fertilizer application significantly reduced the cumulative N2 O emission flux,but had no significant effect on CH4 and CO2 emissions.Compared with CF,N80% reduced the cumulative emission fluxes of three greenhouse gases and N2 O cumulative emissions decreased 32.13%,the difference was statistically significant(P<0.01).Compared with N80%,the effects of MSG residue application on the three greenhouse gas emissions were different,but the difference was not significant.3.Nitrogen fertilizer reduced the comprehensive environmental impact index,but had no significant effect on GWP and GHGI.Compared with CF,N80% decreased GWP and GHGI,but the difference was not statistically significant(P<0.05),and the comprehensive environmental impact index decreased by 23.69%.Compared with N80%,the application of MSG residue had no significant effect on GWP and GHGI,and GM50% decreased the comprehensive environmental impact index by 3.05%,which was the best treatment in this experiment.In conclusion,MSG residue could improve the yield and quality of rice,but had no significant effect on greenhouse gas emission in rice field,and it was the best treatment for the effect of MSG residue on rice field environment in this experiment.Chemical fertilizer combined with flavor residue can be used as an effective way to reduce weight and control greenhouse gas emissions in rice fields.