中国生态农业学报2011，Vol.19Issue(2)：246-252,7.DOI:10.3724/SP.J.1011.2011.00246
长期不同施肥模式对日光温室土壤硝态氮时空分布及累积的影响
Effects of long-term fertilization modes on spatio-temporal distribution and accumulation of soil nitrate nitrogen in solar greenhouse
摘要
Abstract
Continuous localization experiment was conducted for seven years to study the spatio-temporal distribution and accumulation of soil nitrate nitrogen in solar greenhouse.The study showed that nitrate nitrogen content increased through soil profile with increasing planting time.The order of annual increment in soil nitrate nitrogen in relation to fertilization mode was as follows: conventional fertilization ＞ low-input fertilization ＞ organic fertilization.The main nitrate nitrogen distribution soil layer was 0～40 cm.Nitrate nitrogen content in the 0～60 cm soil layer was low at the early stage, high at the middle stage and low at the late stage of crop growth.Compared with the upper soil layers, nitrate nitrogen content in soil layers below 100 cm was increased.Average nitrate nitrogen accumulation in the 0～200 cm soil layer was 33.8％ and 45.9％ less in organic fertilization mode than in low-input and conventional fertilization modes.It was also 18.3％ less in low-input fertilization mode than in conventional fertilization mode.Nitrate nitrogen leaching tendency to soil layers below 200 cm was observed in all three fertilization modes.Compared with conventional fertilization mode, organic fertilization mode obviously reduced nitrate nitrogen content in the soil profiles and retarded downward movement of nitrogen.However, improper application of organic fertilizer induced soil nitrate nitrogen leaching which led to environmental pollution.关键词
日光温室/有机施肥模式/无公害施肥模式/常规施肥模式/土壤NO3--N/积累量/淋洗Key words
Solar greenhouse/ Organic fertilization mode/ Low-input fertilization mode/ Conventional fertilization mode/Soil nitrate nitrogen/ Accumulation/ Leaching分类
农业科学引用本文复制引用
杨合法,范聚芳,梁丽娜,杨玉宝,牛灵安,李季..长期不同施肥模式对日光温室土壤硝态氮时空分布及累积的影响[J].中国生态农业学报,2011,19(2):246-252,7.基金项目
国家科技支撑计划项目(2008BAD96B03,2006BAD10B09)和农业部公益性行业科研专项(200803033)资助 （2008BAD96B03,2006BAD10B09）
