Effects of biochar and substitution ratio of peat on the growth of cherry radish

LIANG Lili; ZHONG Luyao; ZHANG Liao; HOU Jun; SHU Liangzuo

doi:10.16861/j.cnki.zggc.2024.0645

Abstract：In this experiment,60％peat,25％perlite and 15％organic fertilizer were used as control(CK),and two kinds of raw material biochar(rice husk biochar R;com straw biochar C)and three alternative peat ratios(1/6,1/3 and 1/2)were used for a total of six treatments,which were R10(50％peat,25％perlite,15％organic fertilizer,10％rice husk bio-char),R20(40％peat,25％perlite,15％organic fertilizer,20％rice husk biochar),and R30(30％peat,25％perlite,15％organic fertilizer,30％rice husk biochar).C10(50％peat,25％perlite,15％organic fertilizer,10％corn straw biochar),C20(40％peat,25％perlite,15％organic fertilizer,20％corn straw biochar)and C30(30％peat,25％perlite,15％organ-ic fertilizer,30％corn straw biochar)were used to explore the effects of different biochar and its alternative peat ratios on the growth of cherry radish.The results showed that compared with CK,the substrate aeration porosity of rice husk bio-char and corn straw biochar treatment increased significantly by 85.32％-193.25％and 57.14％-93.65％,respectively,pH increased by 12.44％-22.40％and 11.04％-16.02％,respectively,conductivity increased by 6.61％-20.66％and 1.65％-16.12％,respectively,the available phosphorus content increased by 128.92％-226.51％and 137.35％-283.13％,respectively,the available potassium content increased by 16.20％-42.88％and 50.25％-100.00％,respectively.Compared with CK,the transpiration rate,soluble sugar and vitamin C content of cherry radish treated with different ratios of rice husk biochar and 1/6 peat substituted by corn straw biochar were significantly increased,the yield of cherry radish treated with R10,R20 and R30 was significantly increased by 10.68％-25.54％,the yield of cherry radish treated with C10 was significantly increased by 29.96％.The results of PCA analysis showed that the pores,pH,conductivity,available potassi-um and available phosphorus content were the main factors affecting the photosynthetic characteristics and growth charac-teristics of cherry radish.Rice husk biochar and corn straw biochar with different peat substitution ratios could promote the root growth of cherry radish by changing the pore condition and nutrient content of the substrate,then increase the yield of cherry radish,among which rice husk charcoal instead of 1/2 peat and corn straw charcoal instead of 1/6 peat had the best effect.