Production Of High-quality Cultivation Substrates Containing Bagasse,Corncobs And Sawdust By Ending Composting During The Thermophilic Phase And Evaluation Of Their Performance For Cucumber Cultivation

In this paper,the physical,chemical and microbial properties(fermentation temperature,C/N ratio,organic matter,total nitrogen,water-soluble organic matter,water-soluble total nitrogen)of bagasse,corn cob and sawdust were studied in three different agricultural wastes(P<0.05).The effects of different fermentation time(35%)on the fermentation conditions were studied.The effects of different fermentation time(35),nitrate nitrogen,air porosity,water holding porosity,seed germination index,EC,pH,bulk density,bacteria,fungi,actinomycetes and Bacillus sp.Day,45 days,65 days)were mixed with vermiculite by volume 1:1 for nine treatments to study the effects of composting at different stacking times on the growth of cucumber plants.The main findings are as follows:1.In the fermentation process,the bulk density of bagasse,corncob and sawdust was increasing in the fermentation process,and the total porosity and water holding porosity decreased as a whole,while the porosity of the bag was increasing.The EC value of the composting of the three materials is the same as the pH.Both the corncob,the bagasse and the organic carbon content of the sawdust showed a decreasing trend,while the total nitrogen content was significantly higher than that of the initial raw material.The Cw:Norg of bagasse,corncob and sawdust decreased significantly during composting.The trends of bacteria,actinomycetes and bacillus were treated with sugarcane bagasse,corncob and sawdust,began to decrease gradually after 3 days of composting and then reached peak on day 15.2.The root temperature of the plant was increased in three and six days compared to the temperature at which the treatment was carried out for 35 days and 35 days of the composting substrate in January and February.At the end of the cultivation experiment,the bulk density and porosity increased,and the total porosity and porosity decreased after treatment.The contents of pH,TOC,TN and total K(P<0.05)were significantly changed in maize core and sawdust treated at different stacking times.The results of different stacking treatments were significant in the treatment of three different materials(P<0.05)affecting soil bacteria and fungi.3.The same treatment of cucumber plants in the sixth,seventh and eight true leaves(from top to bottom)show similar photosynthetic characteristics of indicators in all treatments,stacked 65 days of substrate planting cucumber leaves show the lowest Net photosynthetic rate,leaf stomatal conductance and transpiration rate.At the same time,the intercellular C02 concentration of the leaves treated with 65 days was the highest.Compared with the substrate deposited for 65 days,the substrate 35 days and 45 days significantly increased the stomatal conductance,net photosynthetic rate and transpiration rate,significantly reduced the intercellular C02 concentration.(P<0.05).The root dry weight of cucumber was significantly higher than that of Cucumber(P<0.05),and the dry weight of cucumber was higher than that of Cucumber(P<0.05)Sawdust,while the upper part of the dry weight,35 days and 45 days of corncob treated cucumber top dry weight was significantly higher than the stacking of 65 days of treatment,stacking 35 days and 45 days of corn cob and wood chips to deal with cucumber.4.Production,according to the growth characteristics of cucumber plants,yield and other indicators can be selected when the fermentation of bagasse,corn cob and wood chips time to reach 35 days,physical and chemical indicators were 48%,32%and 35%of the water holding porosity,44%,53%and 56%of the total porosity,0.35gcm-3,0.34 gcm-3 and 0.23 gcm-3,the fermentation can be stopped and the compost is dried to serve as a cucumber culture substrate.