水土保持学报2012，Vol.26Issue(2)：89-94,202,7.
不同施肥处理条件下苗圃潮土硝态氮垂向运移特征
Vertical Transportation Characteristics of Nitrate Nitrogen Concentration in Nursery Alluvial Soil Under Different Fertilizer Treatments
摘要
Abstract
According to the current status of the lower use efficiency of water and fertilizer on seedling cultivation in typical alluvial soil district of northern China,the seedling fostering base of fast-growing poplar in Changping district of Beijing was chosen as the research object in this paper.Field location monitoring experiments were carried out to study the vertical transport process of soil nitrate nitrogen in 0-100 cm soil profile under various fertilizer treatments.Monitoring results indicated that soil nitrate nitrogen content in the surface soil was higher than that of the other soil layers in 0-100 cm soil profile under three fertilizer treatments.Soil nitrate nitrogen content reduced gradually with the depth of soil profile and soil nitrate nitrogen content with treatment 3 was higher than those of treatment 1 and treatment 2.The average amount of nitrate nitrogen of 0-100 cm soil profile from high to low could be ordered as： Treatment 3 treatment 2 treatment 1.Among them,the average amount of nitrate nitrogen of 0-100 cm soil profile with treatment 3 was up to 307.856 kg/hm2.This showed that excessive fertilization led to nitrate nitrogen accumulation in the soil profile and it also increased the risk of nitrogen leaching loss by soil percolating water.Research results can reveal the mechanism of soil water and nitrate nitrogen vertical transport and leakage loss.This paper is helpful to provide powerful theoretical support and scientific guidance for making scientific fertilization scheme of seedlings,increasing fertilizer use efficiency and improving forest tending and management technology.关键词
施肥处理/苗圃潮土/硝态氮/垂向运移特征Key words
fertilizer treatments: nursery alluvial soil/nitrate nitrogen/vertical transportation characteristics分类
农业科技引用本文复制引用
左海军,马履一,王彦辉,贾忠奎,徐丽宏,王梓..不同施肥处理条件下苗圃潮土硝态氮垂向运移特征[J].水土保持学报,2012,26(2):89-94,202,7.基金项目
林业公益性行业科研专项 （）
国家自然科学基金项目 （）
中央高校基本科研业务费专项 （）
国家林业局森林生态环境重点实验室项目 （）
