摘要
采用主成分分析和通径分析法对紫色水稻土氖素有效性指标进行了研究。主成分分析表明,筛选的土壤全氮(TN)、有机质(OM)、嫌气培养氮_2(AIN_2)、氮素矿化势(N_(01)、N_(02))、铵态氮(AN)和碱解氮(AHN)7个指标均与水稻植株干重、吸氮量呈显著或极显著正相关。通径分析表明,AIN_2、AHN 和 N_(01)是表征紫色水稻土氮素有效性的极好指标。
Principal components analysis and path analysis were conducted to estimate the nitro- gen availability indexes for purple soils.Total nitrogen(TN),organic matter(OM), anaerobic incubation nitrogen 2(AIN_2),nitrogen mineralization Potentials(N_(01)and N_(02)), ammonium-nitrogen(AN)and alkali-hydrolyzable nitrogen(AHN)were selected from ten indexes of the soils tested.They were significantly correlated with dry matter weight and nitrogen uptake of the rice plants in a pot experiment.Path analysis showed that AIN_2, AHN and nitrogen mineralization potential No_1 were the best indexes to predict the nitro- gen availability for purple paddy soils.
出处
《西南大学学报（自然科学版）》
CAS
CSCD
1993年第3期27-31,共5页
Journal of Southwest University(Natural Science Edition)
关键词
紫色土
水稻土
氮
purple soils
rice soils
nitrogen
