摘要
为探究稻麦轮作区秸秆还田对氮肥的替代作用,推进秸秆资源高效利用,提升土壤质量,通过连续4年定位试验,在小麦秸秆全量还田的条件下,设置5个施氮水平,分别为0、60、120、180、240 kg/hm^2,研究不同处理对水稻产量和土壤有机质含量的影响。结果表明,秸秆全量还田下,施氮量为180 kg/hm^2时,水稻产量最高;施氮量为0和60 kg/hm^2时,水稻产量无显著差异;施氮量为120和240 kg/hm^2时,水稻产量无显著差异。秸秆全量还田下,施氮量为0 kg/hm^2时,土壤有机质含量有下降趋势,随着施氮量增加土壤有机质含量有增加趋势,但未达显著水平。
In order to study the substitutable effect of straw returning on nitrogen fertilizer,promote the efficient utilization of straw resources and improve soil quality,a 4-year-field plot experiment was carried out at five rates of nitrogen fertilizer including 0,60,120,180 and 240 kg/hm^2 in rice-wheat rotation system,respectively.The results showed that rice yield was the highest applying rate of nitrogen at 180 kg/hm^2 under straw returning.Applying rate of nitrogen at 0 and 60 kg/hm^2,there was no significant difference in rice yield.Rice yield also was no significant differences between applying rate of nitrogen at 120 and 240 kg/hm^2.The soil organic matter content tended to decrease at applying rate of nitrogen at 0 kg/hm^2.However,with the increase of nitrogen application rate,the soil organic matter content tended to increase,which did not reach a significant level.
作者
陈军
孙义祥
CHEN Jun;SUN Yi-xiang(Lu’an Academy of Agricultural Sciences,Lu’an,Anhui 237000;Institute of Soil Fertilizer,Anhui Academy of Agricultural Sciences,Hefei,Anhui 230031)
出处
《安徽农业科学》
CAS
2020年第11期169-170,共2页
Journal of Anhui Agricultural Sciences
基金
国家重点研发计划项目(2016YFD0200806)。
关键词
秸秆还田
施氮量
水稻
产量
土壤有机质
Straw returning
Nitrogen fertilizer rates
Rice
Yield
Soil organic matter
