摘要
通过大田试验方法,研究分析生物质炭不同施入量（0、10、20、30 t·hm^-2）对旱作农田白浆土土壤碳、氮变化的影响。结果表明,生物质炭施入土壤可有效提高土壤有机质（SOM）、全氮（TN）、微生物生物量碳（MB-C）、微生物生物量氮（MB-N）、硝态氮（NO3^--N）、铵态氮（NH4^＋-N）含量,且这些指标均随施入量的增加而提高。与对照（CK）处理相比,土壤SOM与TN含量分别提高了6.88%~43.77%、1.68%~15.91%,土壤MB-C与MB-N分别提高了9.76%~60.88%、6.72%~68.91%,且均在30 t·hm^-2的施用量下达到最大值。添加生物质炭可以显著提高各深度土层NH＋4-N和NO-3-N含量,总体表现为0—10 cm〉10—20 cm〉20—30cm。建议以30 t·hm^-2生物质炭为白浆土旱作农田土壤的最佳施用量。
In the present study,the effect of different biochar application rate（ 0,10,20,30 t·hm^-2） on soil carbon and nitrogen content was explored via field test. It was shown that application of biochar increased contents of soil organic matter（ SOM）,total nitrogen（ TN）,microbial biomass carbon（ MB-C）,microbial biomass N（ MB-N）,nitrate（ NO-3-N） and ammonium（ NH4^＋-N）,and the more application,the higher the contents. Compared with CK,SOM,TN,MB-C,MB-N content was increased by 6. 88%-43. 77%,1. 68%-15. 91%,9. 76%-60. 88%,6. 72%-68. 91%,respectively. The highest contents for above indexes were all reached at the highest biochar application rate. Application of biochar significantly increased NH4^＋-N and NO3^--N content in every soil depth,and showed an overall tendency of 0-10 cm〉 10-2 0 cm〉 20-30 cm. Thus,application of 30 t·hm^-2 was recommended for albic soil.
出处
《浙江农业学报》
CSCD
北大核心
2016年第10期1745-1754,共10页
Acta Agriculturae Zhejiangensis
基金
黑龙江省科技计划项目(GA10B502)
东北农业大学博士后科研基金项目(2012RCB95)
关键词
生物质炭
白浆土
碳
氮
biochar
albic soil
carbon
nitrogen
