Effects Of Different Combined Application Of Fly Ash And Biogas Residue On Corn Growth And Soil

This test with corn for the object, take pot and field experiments to study combined application of fly ash and the biogas residue to Corn growth conditions,the accumulation of heavy metals in soil in corn ripe, is designed to provide a theoretical support and technical support for promotion of fly ash and biogas residue as fertilizer and impact on soil environment.Using two factor experiment design, set the amount of fly ash and residue administering two factors, The use of fly ash concentration is set to four treatment FO Og/basin, F1of5g/basin, F2of20g/basin, F3of40g/pots, set of four processing residue ZO is Og/basin, Z1is50g/basin, Z2is100g/basin, Z3is150g/pots, two kinds of fertilizer combinations have16treatment, which FOZO combinations as control treatment, repeated three times for all processing plants;The fly ash handling settings for each plot Shi fly ash as FO:Okg, F1:1.5kg, F2:3kg; residue level set gradient of each plot Shi residue ZO:Okg, Z1:50kg, Z2:100kg, same as the control handle setting FOZO combination of two fertilizer combinations have nine treatment and repeated three times, and concluded as follows:1.Experimental research results through the ash and residue with corn emergence relations giving obvious, but when administered alone ash reaches deal F3ie40g/pots, corn germination rate decreased, probably due to ash applied concentration is too large can cause seed rot; various changes in the ash content of maize extent obvious, which illustrates the corn from seed germination to the five-leaf stage seedlings to the total amount of mineral elements accumulated roughly consistent with the basic fertilizer applied unrelated, there is no correlation between them.2. Fly ash contains a certain amount of heavy metals into the soil when the corn will be absorbed and accumulate in various organs in corn, corn on the heavy metals cadmium, chromium, lead, arsenic, copper content accumulate in various organs of the distribution roughly case of root> leaf-> stem> seed, and heavy metals in various organs did not exceed the national food hygiene standards.3.Corn mature administered alone40g/basin copper content of fly ash soil values of up to54.11mg/Kg less than the national standard copper content of two100mg/kg, the highest zinc content in soil is 172.39mg/kg less than the national zinc content two standard300mg/kg, the lead content in soil lead levels are less than the national secondary standard350mg/kg, the treatment of arsenic in soil were less than the national standard of soil arsenic a15mg/kg, each treatment of cadmium were not detected.4.Soil invertase and catalase activity along with the increase in fly ash application rate decreases with the increase of biogas fertilizer is enhanced, with the increase in the amount of fly ash application makes biogas residue on the soil invertase, catalase activity to promote enhanced role, the reason is not clear. Phosphatase, urease activity with the application of fly ash and residue enhanced by increasing the amount of fly ash and biogas fertilizer on phosphatase, urease activity was stronger than the impact of fly ash and residue alone application on phosphatase, urease enzyme activity. Fly ash and residue, whether administered alone or combined application could significantly increase soil phosphatase, urease activity, and when combined application of fly ash and residue when this effect is more obvious, reason may be administered as a residue activated carbon source for microbial microorganisms have a strong impact, and fly ash may change physical and chemical properties of the soil, reducing soil bulk density increased soil aeration beneficial soil microbes multiply thus increasing soil phosphatase and urease enzyme amount.5. Field corn in the F1, F2, Z1, Z2, F1Z1, F2Z2these six treatment compared with the control kernel weight were increased significantly different, indicating that the corn kernel weight with the fly ash content increases, one hundred weight also increased, and the processing facilities residue weight gain is more obvious; Fly F2, a large quantity of seed weight applied broadly in line with the small fly ash application of F1seed weight equivalent, indicating the amount of fly ash application increase does not increase the weight of maize grain; biogas application of Z2Zl kernel weight is greater than the kernel weight administered residue. Rows per ear of corn has little relationship with the fertilizer, and corn itself has a lot of genetic traits. With the application of fly ash and residue increasing in the amount, per row increased significantly, when the amount of fertilizer to a certain content of corn kernels per row after not increasing. Corn ear diameter within a certain range and soil nutrient supply was positively correlated with fertilizer reaches a certain level relationship is not obvious ear diameter increases. Field corn production processing F2Z2(3kg per cell and per cell application of fly ash residue administered a combination of100kg) highest yield752.33kg; processing Z2(100kg each plot applied biogas), F1Z1(50kg biogas per cell application combination of fly ash and1.5kg), F2Z2(100kg per cell application and3kg ash residue combinations) yield essentially equivalent, and soil and fertilizer along with the increase, and the fly ash and marsh slag with stronger role in Corn administered alone fly ash and residue.