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
2010-2013年间，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了研究，结果表明：淋溶年平均发生7次-8次，受降雨影响较大，其中6月和7月的淋溶次数占到了全年的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，农田本底流失量平均为5 kg/hm2，各施肥处理在4.53-7.17 kg/hm2，农田本底氮素流失占到了流失的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。
英文摘要:
Research has 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. Results indicates: 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/hm2 on average, fertilization controlled within 4.53-7.17 kg/hm2; the farmland background Nitrogen loss accounted for over 70% of the total loss. The 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.
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