杨树叶生物质炭对风沙土中氮形态分布的影响

Effects of Biomass Charcoal from Poplar Leaves on Distribution of Nitrogen Forms in Aeolian Sandy Soil

将杨树叶生物质炭添加到模拟施肥的风沙土中,研究杨树叶生物质炭对风沙土中氮形态分布的影响.结果表明:与传统施肥模式及测土配方施肥模式相比,制备的生物质炭可增加风沙土铵态氮、硝态氮、速效氮和全氮的质量比;在玉米的生长周期内,铵态氮、硝态氮和全氮质量比与生物质炭的添加量成正比;当生物质炭添加质量分数为2%时,与土壤充分混合,铵态氮、硝态氮和全氮的质量比分别为36.43 mg/kg,35.02 mg/kg,5.76 g/kg,传统施肥模式下的质量比最高;速效氮在添加生物质炭的质量分数为0.5%时,测土配方施肥模式下的质量比最高,为79.52 mg/kg.

The biomass charcoal from poplar leaves was added to the aeolian sandy soil with simulated fertilization,we studied effects of biomass charcoal from poplar leaves on distribution of nitrogen forms in aeolian sandy soil.The results show that compared with the traditional fertilization mode and soil testing formula fertilization mode,the prepared biomass charcoal can increase the mass ratios of ammonium nitrogen,nitrate nitrogen,available nitrogen and total nitrogen in aeolian sandy soil.The mass ratios of ammonium nitrogen,nitrate nitrogen and total nitrogen are directly proportional to the amount of biomass charcoal added in the growth cycle of maize.When the mass fraction of biomass charcoal addition is 0.2%,it is fully mixed with the soil,the mass ratios of ammonium nitrogen,nitrate nitrogen and total nitrogen are 36.43 mg/kg,35.02 mg/kg,5.76 g/kg,which are the highest in the traditional fertilization mode,when the mass fraction of biomass charcoal addition is 0.5%,the mass ratio of available nitrogen is the highest under the soil testing formula fertilization mode,and the mass ratio is 79.52 mg/kg.