Abstract:

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.