摘要
通过田间定位试验,研究了稻草秸秆还田对土壤有机质及其养分含量、土壤微生物生物量、土壤酶活性及水稻产量的影响。试验结果表明:秸秆还田显著提高了土壤有机质及养分含量,与对照相比,秸秆还田的处理土壤有机质含量提高了7.00%,土壤全氮、速效磷、速效钾和缓效钾含量分别提高了3.57%、3.49%、4.11%和3.39%;秸秆还田显著提高了土壤微生物生物量碳、氮,与对照相比,土壤微生物量碳、氮分别提高了37.4%和21.8%;秸秆还田显著提高了土壤酶活性,与对照相比,土壤脲酶、过氧化氢酶和蔗糖酶的活性分别提高了67.4%、12.4%和7.43%;秸秆还田显著提高了水稻产量,与对照相比,秸秆还田的处理和秸秆还田并配施腐熟剂的处理水稻实际产量分别增加了4.85%和5.96%。
To study the effects of straw returning on the contents of soil organic matter and nutrients,microbial biomass-C,N,soil enzyme activities and rice yield,a long-term experiment was conducted in an acid paddy field of Hezhou,Guangxi,China. The results showed that compared with the control,the contents of soil organic matter and nutrients were significantly higher with straw returning treatment. The contents of soil organic matter,total nitrogen,available phosphorus,available potassium and slow-available potassium were increased by 7. 00%,3. 57%,3. 49%,4. 11% and 3. 39%,respectively; Soil microbial biomass-C,N was also significantly higher with straw returning treatment,increased by 37. 4% and 21. 8%,respectively; The straw returning treatment increased urease activity,catalase activity,and sucrase activity by 67. 4%,12. 4%,and 7. 43%,respectively. Rice yields with straw returning treatment,straw returning combined with decomposition agent treatment,increased the actual rice yields by 4. 85% and5. 96%,respectively.
出处
《土壤与作物》
2017年第4期270-276,共7页
Soils and Crops
基金
贺州市农作物秸秆综合利用技术示范与推广项目(贺科产1408012)资助
