A method for promoting photolysis and biodegradation of returning straw by oxalic acid agent
A biodegradation and straw technology is applied in the field of straw biomass resource utilization, which can solve the problems of restricting popularization and application, accelerating straw biodegradation, and fluctuation of biodegradable bacteria or compound enzymes, and achieving the effect of accelerating biodegradation.
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Embodiment 1
[0017] Example 1 The promoting effect of oxalic acid agent on the natural photolysis of straw
[0018] Spray 5% oxalic acid on the surface of the crushed 1-8cm straw, then spread the straw in a sunny place in the outdoor farmland for natural photolysis, retrieve the straw after 35 days, and measure the relative crystallinity of the straw. figure 1 It is the result of the relative crystallinity of 35-day farmland straw after natural photolysis. Compared with the original straw, the relative crystallinity of the clear water group and the 5% oxalic acid treatment group decreased by 7.87% and 29.56%, respectively. The 5% oxalic acid treatment group and the clear water group Compared with straw, the relative crystallinity decreased by 23.54%, which has a significant difference, indicating that straw can undergo photolysis under natural conditions, and 5% oxalic acid treatment can promote the natural photolysis of straw.
Embodiment 2
[0019] Example 2 Effects of Different Chemical Dosages on Straw Biodegradation
[0020] Weigh the straw treated in Example 1 and put it into nylon bags, each bag contains 15g of straw, and bury the bag in the farmland soil with a depth of 10-20cm, and the rest of the field management is carried out normally; take out according to the set date Nylon bags, take at least 5 bags each time, carefully wash with clean water to remove the soil adhered to the surface of the straw, dry at 60°, seal and store, and measure the quality of the straw. figure 2 It shows the effect of different dosages of pesticides on the quality of straw returned to the field. On the whole, the oxalic acid treatment group can reduce the quality residue of straw. Compared with the control group, the residue quality of straw in the 43-day experiment of the three different treatment groups is reduced by 1.38-7.44%; On the 15th day, there was no significant difference between the 1% and 0.1% oxalic acid applica...
Embodiment 3
[0021] The impact of embodiment 3 different medicament dosages on soil pH
[0022] The straw nylon bag retrieved in Example 2 was vibrated and tapped to obtain the soil around the returned straw, and the pH of the fresh soil was tested to investigate the effect of the pesticide application on the soil pH. The soil pH was tested with a water-to-soil ratio of 2.5:1. Figure 4 It is the graph of the influence of different dosages of pesticides on soil pH. There was no significant difference in soil pH between the groups treated with different dosages of oxalic acid and the blank control group when the pesticides were applied for 15 days. Sexual differences, indicating that the application of pesticides will not change the pH of the soil. Figure 5 It is a graph of the influence of long-term pesticides on soil pH. The results of field experiments at 181 days show that there is no significant difference compared with the blank under the dosage of 5% oxalic acid as a whole. Among th...
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