农业环境科学学报2011，Vol.30Issue(11)：2313-2318,6.
北京郊区有机蔬菜土壤养分平衡及δ15N特征分析
Soil Nutrients Balance and δ15N Characteristics for Organic Vegetable Production in Beiiing Suburbs
摘要
Abstract
This study reviewed organic and conventional vegetable bases in the Beijing suburbs, and took soil, vegetable and fertilizer samples for the analysis of soil nutrients balance and δ15N characteristics. The results indicated that: ( 1 )when comparing types of farms, as organic fertilizer levels increased, the Huiyuan organic vegetable-soil system had more surplus of Nitrogen( N ), Phosphorous( P )and Potassium( K ) nutrients(356-472 kg·hm-2, 298 kg·hm-2 and 200-226 kg·hm-2, respectively) than the Zhenggu farm(-164~190 kg·hm-2, 107.9-435.5 kg·hm-2 and -164.5-136.8 kg·hm-2); (2)the Huiyuan organic production system tended to accumulate an excess of P because of high fertilizer input; (3)leaf vegetables had the highest δ15N value( 10.49%o), fruit vegetables rank the second( 10.07%.) and root vegetables had the lowest δ15N value(5.62%o); (4)plant leaves are more sensitive than fruit to the application of nitrogen fertilizer, which is seen in the garden pepper, where its leaf had higher δ15N(2.44%e)value than its fruit(9.35%o);(5 )total N in soil was positively correlated with soil δ15N, with the following regression equation:δ15Nsoal=13.098Nscml+3.762 4, R2=0.938. However, there is low correlation between plant and soil δ15N, and between plant δ15N and soil total nitrogen. Long term application of organic fertilizers will increase the quantity of 15N and also δ15N of vegetables. Higher quantity of organic fertilizers will increase δ15N of leaf vegeta关键词
有机农业/蔬菜/养分平衡/δ15N/北京Key words
organic agriculture/ vegetable/ nutrient balance/ δ15N/ Beijing分类
农业科技引用本文复制引用
诸葛玉平,苏志慧,张彤,王会,孟凡乔,吴文良,郭岩彬..北京郊区有机蔬菜土壤养分平衡及δ15N特征分析[J].农业环境科学学报,2011,30(11):2313-2318,6.基金项目
国家自然科学基金项目(30970533) （30970533）
