论文部分内容阅读
【目的】阐明连作蔗田土壤的培肥效应,为建立合理的甘蔗施肥制度及提高连作蔗田土壤质量提供参考。【方法】以连作甘蔗11年的赤红壤为研究对象,按不同施肥措施设单施化肥、单施有机肥、有机肥和化肥配施等8个处理,测定不同施肥处理对土壤微生物量、土壤酶活性及土壤相关肥力因子的影响。【结果】不同施肥处理的土壤微生物量氮、碳、磷及土壤酸性磷酸酶、过氧化氢酶、蔗糖酶、脲酶活性均比对照处理增加,其中微生物量氮增加5.56%~67.13%、微生物量碳增加4.01%~20.40%、微生物量磷增加6.39%~67.02%;酸性磷酸酶活性提高12.96%~35.19%、过氧化氢酶活性提高18.24%~78.93%、蔗糖酶活性提高3.00%~42.00%、脲酶活性提高1.21%~23.43%;而不同施肥处理的土壤养分增加不显著(P>0.05)。土壤微生物量氮、碳、磷和酸性磷酸酶、过氧化氢酶、脲酶活性与速效磷、速效钾、全氮之间的相关性均达显著(P<0.05)或极显著(P<0.01)水平。【结论】以土壤微生物量和酶活性作为连作蔗田土壤培肥的评价指标更加全面和灵敏。
【Objective】 The objective of this study is to clarify the effect of fertilizing on soils for continuous cropping of sugarcane so as to provide a reference for establishing a reasonable sugarcane fertilization system and improving the quality of soils for continuous cropping. 【Method】 With 11 years of continuous cropping sugarcane as the research object, eight treatments including single fertilizer application, organic fertilizer application, organic fertilizer application and chemical fertilizer application were conducted according to different fertilization measures. The effects of different fertilization treatments on soil microbial biomass, soil Enzyme Activity and Soil - Related Fertility Factors. 【Result】 The results showed that soil microbial biomass nitrogen, carbon, phosphorus and soil acid phosphatase, catalase, invertase and urease activity increased with different fertilization treatments. Microbial biomass nitrogen increased by 5.56% -67.13%, microbial biomass Carbon increased by 4.01% -20.40%, microbial biomass increased by 6.39% -67.02%, acid phosphatase activity increased by 12.96% -35.19%, catalase activity increased by 18.24% -78.93%, invertase activity increased by 3.00% -42.00% , And the urease activity increased by 1.21% ~ 23.43%. However, the soil nutrients in different fertilization treatments did not increase significantly (P> 0.05). The correlations between soil microbial biomass N, C, P and acid phosphatase, catalase, urease activities and available phosphorus, available potassium and total nitrogen were all significant (P <0.05) or extremely significant (P <0.01) Level. 【Conclusion】 It is more comprehensive and sensitive to evaluate soil fertility in continuous cropping of sugarcane with soil microbial biomass and enzyme activity.