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基于渗漏池法研究施肥对东北中部雨养区玉米氮素地下淋溶的影响 被引量:8

Study of the Influence of Fertilization on Nitrogen Leaching Underground in Northeast Central Raining Area by Percolating Pools
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摘要 2010—2013年,对东北玉米土壤氮素地下淋溶年际发生规律和氮排放强度进行研究。结果表明,淋溶年平均发生7—8次,受降雨影响较大,其中6月和7月的淋溶次数占全年的2/3。农田氮素淋溶排放强度年际间差异较大,最高值与最低值差8倍左右,农田本底(不施肥)流失量平均为5kg/hm2,各施肥处理在4.53—7.17kg/hm2,农田本底氮素流失70%以上,整体来看,北方农区氮素的地下淋溶强度不高,约占施氮量的5%左右,受降雨、施肥、土壤类型等综合因素的影响。 Research had been conducted on the inter-annual occurrence law of the nitrogen underground leaching and nitrogen emission intensity in the northeastern corn soil during the period of 2010-2013. The results indicated that leaching occurred 7-8 times annually on average, influenced by the rainfall to a relative large degree, of which leaching occurred in June and July accounted for two-thirds that of the whole year' s. The farmland nitrogen emission intensity was of a relatively great inter-annual difference, with about eight times of gap between the highest and lowest value; the farmland background loss was 5 kg/ha on average, fertilization controlled within 4.53-7.17 kg/ha; the farmland background nitrogen loss accounted for over 70% of the total loss. Nitrogen underground leaching is not high as a whole in the northern agricultural area, about 5% of the fertilized nitrogen amount, and was a comprehensive result affected by the rainfall, fertilization, soil type and other factors.
出处 《玉米科学》 CAS CSCD 北大核心 2015年第6期125-130,共6页 Journal of Maize Sciences
基金 吉林省重点科技攻关项目(20140204017NY) 农业部生态环境专项(2110402) 国家科技支撑计划(2012BAD04B00)
关键词 玉米 渗漏 地下淋溶 氮排放强度 Corn Percolation pool Underground leaching Nitrogen emission intensity
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