Effects Of Combined Application Of Biochar-Base Fertilizer And Chemical Fertilizer On Rice Yield And Soil Nutrients

Biochar-base fertilizer is a new type of fertilizer made by mixing biomass charcoal with chemical fertilizers.It has obvious effects on reducing fertilizer loss and improving soil.At present,the impact of carbon basal fertilizer and fertilizer different patterns of red soil fertility and double cropping rice yield less well understood.To investigate the milk vetch Field charcoal under basal and chemical fertilizer on yield and soil nutrient rice,this study Wannian County of Jiangxi Province localization experiments began in March 2018,in order to conventionally tilled winter fallow as control,analysis The effects of different application modes of biochar-base fertilizer and chemical fertilizer on rice growth,grain yield and soil physical and chemical properties showed that:1.Different application modes of biochar-base fertilizer and chemical fertilizer affected rice yield.In the early rice season,compared with the conventional nitrogen application in winter,the reduction of 20%fertilizer nitrogen treatment increased yield by 0.38¹.23t·hm^-2.Reduced application of 20%of each treatment yield.With the decrease of the proportion of chemical fertilizers in fertilization,the proportion of biochar-base fertilizers increased first and then decreased.In the late rice season,compared with the conventional nitrogen application in winter,the yield of F₈₀N₈C₂ treatment increased by 20%reduction of fertilizer nitrogen.The comparison of rice yield in the whole year showed that the biochar-base fertilizer and chemical fertilizer were combined in the field of Chinese milk vetch.With the increase of the proportion of biochar-base fertilizer and the decrease of the proportion of chemical fertilizer,the yield of rice in each treatment showed a trend of increasing first and then decreasing.When the N ratio of fertilizer N and biochar-base fertilizer N was 8:2,the yield increase of rice was the most obvious.3.The combination of biochar-base fertilizer and chemical fertilizer increased the dry matter accumulation of rice.Compared with conventional nitrogen application in winter,the dry matter accumulation of rice with biochar-base fertilizer and chemical fertilizer increased to some extent,and the ratio of chemical fertilizer N to biochar-base fertilizer N was 8:2 The amount of dry matter accumulated was the largest,which increased by2.6%⁷.9%compared with conventional nitrogen application in winter,but the difference between treatments was not significant.4.The combination of biochar-base fertilizer and chemical fertilizer affected soil nutrient content.The contents of total nitrogen,alkali nitrogen and available potassium in different application modes of biochar-base fertilizer and chemical fertilizer were significantly higher than those in conventional winter nitrogen application,but the content of available phosphorus in each treatment was not much different.In summary,under the condition of Chinese milk vetch returning to the field and reducing the application of 20%fertilizer nitrogen,the treatment of fertilizer N and biochar-base fertilizer N ratio of 8:2 is the carbon fertilizer in the red soil double-season rice area to reduce fertilizer application and ensure high yield.Combined with fertilizers.