热带作物学报2017，Vol.38Issue(11)：2003-2007,5.DOI:10.3969/j.issn.1000-2561.2017.11.002
调节碳氮比对甘蔗叶还田后土壤无机氮、微生物量氮、水溶性有机碳含量和脲酶活性的影响
Effects of Different C/N Ratio on Soil Mineral N, Microbial Biomass N, Water-soluble Organic Carbon Content and Urease Activity After Sugarcane Leaves Returning
摘要
Abstract
How to scientifically apply N fertilizer is a key problem when straw returning.Based on C/N ratio,a laboratory experiment was conducted to study the effects of different C/N ratios mediated by sugarcane leaves returning plus nitrogen fertilizer on soil total nitrogen,ammonium nitrogen,nitrate nitrogen,microbial biomass nitrogen,water-soluble organic carbon content and urease activity.Six treatments were set:CK (sugarcane leaves removal without fertilizer),T1(C/N ratio 15∶1),T2(20∶ 1),T3(25∶ 1),T4(30∶ 1) and T5(35∶ 1).The results showed that sugarcane leaves returning amended with N fertilizer significantly increased soil nitrogen content.At the beginning of the test,there was an increasing trend of soil total nitrogen content with N fertilizer application proportion.With the extension of time,an adjusted C/N ratio of 25∶1-35∶1 increased soil total nitrogen,ammonium nitrogen and nitrate nitrogen content.Sugarcane leaves returning amended with N fertilizer also increased soil microbial nitrogen content and urease activity.We concluded that applying N fertilizer plus sugarcane leaves returning and adjusting C/N ratio to 25∶1 was more suitable for increasing soil nitrogen content.关键词
甘蔗叶还田/氮肥/C/N/土壤氮素Key words
Sugarcane leaves returning/nitrogen fertilizer/C/N ratio/soil nitrogen分类
农业科技引用本文复制引用
单颖,田路园,邹雨坤,赵凤亮,李光义,侯宪文,李勤奋..调节碳氮比对甘蔗叶还田后土壤无机氮、微生物量氮、水溶性有机碳含量和脲酶活性的影响[J].热带作物学报,2017,38(11):2003-2007,5.基金项目
公益性行业(农业)科研专项(No.201203072-04,201503106) （农业）
中国热带农业科学院基本科研业务费专项资金(No.1630042017001). （No.1630042017001）
