| From 2017 to 2018,in the Caijiabao Village of Kailu County,Tongliao City,Tongliao District,the two loam types of cornfields in the middle loam and sandy loam were selected,and the straw returning to the field was not used as a control?CK?.Study on the corn stalk returning field with Renyuan straw returing and Zhongnong Lukang straw returing?Indicated as medium-sized human element bacteria agent,sand soil human element bacteria agent,medium-green agro-green bio-bacteria agent,sand-soil agro-green bio-bacteria agent,respectively abbreviated as ZR-RY,SR-RY,ZR-ZN,SR-ZN?,and the canopy physiology of spring maize population in the West Liaohe Plain Characteristics,root morphological characteristics,material accumulation and transport,soil physical and chemical properties and yield,in order to reveal the difference in the effects of decomposing agents on the return of corn stalks to different fields in different soil types in the West Liaohe Plain,and to select suitable corn stalk decomposers for local production.Provide guidance.The main test results are as follows:1.The leaf area index,leaf layer area index,SPAD value,chlorophyll density,leaf SOD and POD activity of spring maize population in the middle loam and sandy loam soil were compared with the control,among which ZR-RY>ZR-ZN>ZR-CK,SR-ZN>SR-RY>SR-CK;only the ZR-RY leaf area index,SPAD value,chlorophyll density,leaf SOD and POD activity of the same decomposing agent in soil with different texture were significantly higher than SR-RY The MDA content is reversed,and the difference between ZR-ZN and SR-ZN is not significant.2.The contribution rate of dry matter accumulation,dry matter accumulation rate,dry matter transport capacity,dry matter transport rate and translocation volume of the spring maize group to the grain in the middle loam and sandy loam soil was higherthanthatofthecontrol,amongwhichZR-RY>ZR-ZN>ZR-CK,SR-ZN>SR-RY>SR-CK,the same decomposing agent only ZR-RY dry matter accumulation,dry matter accumulation rate,dry matter transfer amount,dry in different texture soils The contribution rate of material transport rate and translocation to grain was significantly higher than that of SR-RY,and the difference between ZR-ZN and SR-ZN was not significant.3.The activity of corn root dry weight,root SOD and POD was improved in the middle loam and sandy loam soil,and ZR-RY>ZR-ZN>ZR-CK,SR-ZN>SR-RY>SR-CK,and the content of MDA decreased,contrary to SOD and POD;the same decomposing agent only had ZR-RY corn root dry weight,root SOD,POD activity and MDA content in different texture soils were significantly higher than SR-RY,ZR-ZN The difference from SR-ZN is not significant.4.The ear traits,yield and components of spring maize population treated with straw returning and maturing agent in middle loam soil and sandy loam soil were higher than those in the control.The highest yields of the two years were 10.84 t hm-22 and 14.43 t hm-22 in loam soil and 10.00 t hm-22 and 13.87 t hm-22 in sandy loam soil.Except for the length of bald tip,all other indicators showed that ZR-RY and SR-ZN were significantly higher than the control.The main reason for yield difference was the number of effective panicles,but the difference of 1000-grain weight and number of grains per panicle was not significant,and the number of effective panicles showed that only ZR-RY was significantly higher than SR-ZN.5.The application of two kinds of decomposing agents in the two soils could increase the soil available nutrient,inorganic nitrogen content and soil enzyme activity.The alkali nitrogen and available potassium content all reached significant differences in the ripening period,while the effective phosphorus content in the ripening period was different.Not significant,but the effective phosphorus content of ZR-RY was significantly higher than the other two treatments during the ripening period;the four enzyme activities of ZR-RY were significantly higher than the other two treatments in 2018,and the four enzyme activities of SR-ZN for 2 years.Both are significantly higher than the other two treatments.Overall,the medium loam and the sandy loam soil returning to the field combined with the application of the decomposing agent are better than the straw returning to the field without fertilizing the ripening agent,and the middle loam is better with the application of the human decomposing agent,and the sandy loam is combined with the application of the green Kangshuo cooker works better. |
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