摘要
研究不同肥料配施处理对土壤和大白菜中稳定性氮同位素丰度(δ15N‰)及硝酸盐含量的影响。结果表明,随着有机肥比例的降低,大白菜中δ15N和硝酸盐含量分别呈现逐渐降低和增加的趋势,对照大白菜中δ15N和硝酸盐含量分别为+9.355‰和1459mg/kg;纯有机肥(100%-O)和纯化肥(100%-C)处理大白菜中δ15 N分别为+6.898‰和+4.098‰(P>0.05),而硝酸盐含量分别为1658和2138mg/kg(P<0.05);不同肥料配施处理时大白菜中δ15 N和硝酸盐含量间存在负相关(R=-0.9064)。土壤中δ15N的变化受不同施肥处理的影响较小,其变化范围为+7.706‰～+9.903‰;而大白菜中δ15N的变化影响较大,其范围为+4.098‰～+9.355‰。研究表明不同肥料配施处理能够影响大白菜中δ15N的变化趋势,可以初步利用δ15N作为标记来判断肥料来源,但需要进一步研究不同肥料配施时δ15N的分布规律。
Effects of combined application of organic and chemical fertilizers on stable nitrogen isotope abundance（δ^15-‰） and nitrate content were investigated in soil and Chinese cabbage（Beassica pekinensis L.）.The results showed that,with application rate of organic manure decreasing,the δ^15N of Chinese cabbage was decreased from ＋ 9.355‰ for control group to ＋ 4.098‰ for pure chemical fertilizer group,and for the nitrate content which was from 1459mg/kg to 2138mg/kg.There was no significant difference（p 0.05） between pure organic manure（100%-O） and pure chemical fertilizer（100%-C） treatment for δ^15N,and for nitrate content which was sigificant difference（p〉 0.〈05）.There was a negative correlation（R =-0.9064） between δ^15N and nitrate in Chinese cabbage among different treatments.The δ^15 in soil was less affected by the fertilizer,which ranged from ＋ 7.706‰ to ＋ 9.903‰;however,the δ^15N of cabbage was more affected by the fertilizers which was from ＋ 4.098‰ to ＋ 9.355‰.In summary,combined application of organic and chemical fertilizers can affect the δ^15N in Chinese cabbage,which can be used to differentiate the source of fertilizer,but further study needs to be done for the distribution of the stable nitrogen isotope.
出处
《核农学报》
CAS
CSCD
北大核心
2011年第1期137-142,共6页
Journal of Nuclear Agricultural Sciences
基金
浙江省科技攻关项目(2007C02002-1)
浙江省农业科学院博士启动基金项目(2008)
关键词
稳定性氮同位素
有机肥料
硝酸盐
大白菜
stable nitrogen isotope
organic manure
nitrate
Chinese cabbage
