低丘红壤旱地花生秸秆室内腐熟技术研究

Study on Decomposition Technology of Arachis hypogaea Straws of Upland Region with Hilly Red Soil

为了研究红壤旱地花生秸秆腐熟技术,以秸秆失重率为指标,通过单因素室内模拟腐熟考察了低丘红壤旱地花生秸秆室内腐熟条件。以秸秆失重率、颜色、C/N、纤维素酶活性为指标,以腐秆剂A和B为对象,探讨腐秆剂对秸秆腐熟的影响。结果表明:花生秸秆室内模拟腐熟所需水分、尿素、生石灰、腐秆剂与秸秆干重的比例分别为425:100、0.6:100、0.25:100、0.13:100。添加腐秆剂可以明显促进花生秸秆的腐解,与CK相比,腐熟30天后,添加腐秆剂的处理A、B的秸秆失重率分别提高20.1%、15.0%;秸秆C/N分别降低6.0%、5.1%;纤维素酶活性分别提高120.0%、95.5%。研究的结果还显示:秸秆失重率与纤维素酶活性以及秸秆的C/N都呈显著线性相关,纤维素酶活性随秸秆失重率增大而增大,C/N随秸秆失重率增大而减小。

In order to study red soil upland Arachis hypogaea Straws decomposition technique,an incubation experiment with single factor design was carried out to study the decomposition conditions of Arachis hypogaea straws according to straw weight loss rate.On the basis of former experiments,the effect of straw decayed bacteria（A and B） on straws decomposition was examined according to straw weight loss rate,color,C/N,enzyme activity of cellulase.The results showed that： the amount of water,urea,lime,straw decayed bacterium and straw dry weight ratios were 425：100,0.6：100,0.25：100 and 0.13：100,respectively.Both the straw decayed bacteria（A and B） could significantly promote the decomposition of peanut straw.After 30 days,compared with CK,the presence of straw decayed bacterium A,B increased the straw weight loss rate by 20.1% and 15.0% respectively.Straw C/N were decreased by 6.0%,5.1%;enzyme activity of cellulase increased by 120.0%,95.5% respectively.The results of this study also showed： a strong linear correlation was observed between straw weight loss rate and enzyme activity of cellulase,C/N.The enzyme activity increased with straw fiber weight loss rate,while C/N decreased with the increasing straw weight loss rate.