Effects of Application Time of Glutamate Fermentative Waste on Rice Nitrogen Nutrient and Soil Fertility

Zhang Lianqiu; Ren Yanyun; Zhang Jingmin

doi:10.14083/j.issn.1001-4942.2017.11.017

Abstract：To explore the utilization technology of glutamate fermentative waste in agriculture,the effects of different application times of glutamate fermentative waste (basic fertilizer,tiller fertilizer and panicle fertilizer) on rice nitrogen nutrient and soil fertility were studied by pot experiment.The results showed that under the condition of the same nitrogen application rate,compared with control of applying inorganic fertilizer (F)at all the three growing stages (FFF),the application of glutamate fermentative waste (M) could obviously enhance the rice root weight,tiller number,panicle weight,nitrogen content and distribution ratio in roots.Applying glutamate fermentative waste at the tillering stage (FMF),the grain weight of single plant increased by 11.25％ compared with FFF,but there was no significant difference between MMM and FFF.For the grain nitrogen content,the highest appeared in FMF,there was no significant difference between MMF and FFF,and that in MMM was significantly lower than that in FFF.The application of glutamate fermentative waste could also obviously enhance soil available phosphorus,potassium,copper,zinc and ferric content.Except MMM,the total salt quantity in FMF and MMF were significantly lower than that in FFF,but the pH value had no significant difference among FMF,MMF and FFF.It could be concluded that applying glutamate fermentative waste before the tillering stage could increase the rice root weight,tiller number and grain weight.Using inorganic as panicle fertilizer could promote the nitrogen content and distribution ratio in grain.Furthermore,reasonable application of glutamate fermentative waste had no significant impact on the soil salt content and pH value.