The Impacts On The Content Of Water-Stable Aggregates And The Accumulation Of Soil Organic Carbon By Inoculated Earthworm In Black Soil

The study of this article is mainly about the impact of earthworm on the physical andchemical property of the soil by choosing the representative soil in Northeast China District,inoculated earthworms, the living environment of earthworms for simulation and analysis ofresearch activities the impact the content of water stabile aggregates and the accumulation oforganic carbon and to improve the physical and chemical properties of the black soil, blacksoil to maintain fertility, provide a reference. Experimental studies through a number ofdifferent in a small the time scale, and put a certain amount (10g) of the same feeder (driedsoybean defoliation) on water stable aggregates content and organic carbon black Volume ofinoculation and the same number of earthworms and the feeder is not limited by inputdifferent diet (C: corn stalks, S: soybean deciduous, D: cow dung) in the soil to be two ofvermicompost and the content of organic carbon. The main findings are as follows:1) Effect of different quantity of earthworms on content of water stable aggregates increasedsignificantly (P＜0.05). In the soilⅠ(of corn planted plot) after 7 d and 28 d after treatment0.25-0.5mm diameter under the water stable aggregates content and＞0.25mm water stableaggregates content control increased significantly (P＜0.05). In the soilⅡ(soybean plantedplots), the number of earthworms different between the treatment on content water-stableaggregates varies significantly (P＜0.05). Even diet depleted, causing earthworm with varyingdegrees of escape. But the soil by earthworms activities＞0.25mm water stable aggregates thetotal content of the increase compared with the control or significantly. The results showedthat the activities of earthworms, the content of water stable aggregates in the soilⅠhigherthan theⅡ, This phenomenon has proved a point of view that the content of water stableaggregates related to the content of organic carbon in the soil.2) The number of different inoculating earthworms and inputs of a certain food processing,from two different plots of soil organic carbon content in earthworms after 7 d after which theorganic carbon content control low, and significantly higher than the original soil, earthwormsafter 28 days of activities, two of the soil organic carbon content lower than that in control, itwas very close to the original soil level, after earthworm activities. Soil organic carbon releasea much faster rate. 3)The same amount of coverage is not limited earthworms into the handling of different diets,Feces the organic carbon content with the control or whether the original soil has increasedsignificantly, and demonstrate to the contribution of organic matter mineralization. The pilot,we will vermicompost of organic carbon by heavy liquid separation, were measured light andreorganization group of organic carbon content, The results showed that the input of differentdiet Light Group share a significant difference (P＜0.05), C/N (56) the highest C, the LightGroup C accounts for the largest proportion in the soilⅠ,Ⅱrespectively reached 30.25％and28.46％. Group C reorganization of the organic carbon content than the D and S groups lower,show the difference significantly. Note earthworm feeding different C/N feeder afterdigestion efficiency, a large part of the straw in the feeding but not completely digested by thehomogeneous mixture into vermicompost, organic carbon in the soil to preserve theconditions for mineralization. Feeding the soybean defoliation vermicompost whether Lightor reorganization of organic carbon content are the lowest. This shows through earthwormsdigestion of organic matter C/N, the lower it higher the level of mineralization.