棕壤定位施氮对土壤养分及春玉米产量的影响  

Effects of Long Term Nitrogen Fertilizer on Spring Maize Yield and Soil Nutrient in Brown Soil

作　　者：张艳君[1] 汪仁[1] 刘艳[1] 邢月华[1] 包红静[1] 宫亮[1] 隽英华[1] 

机构地区：[1]辽宁省农业科学院植物营养与环境资源研究所,辽宁沈阳110161

出　　处：《辽宁农业科学》2015年第3期6-9,共4页Liaoning Agricultural Sciences

基　　金：国家科技支撑计划项目(2011BAD16B12;2012BAD04B03;2013BAD07B03)

摘　　要：为了研究施用氮肥对土壤养分和春玉米产量的影响,在辽北昌图县棕壤土上开展了长期定位试验。试验结果表明,不施任何肥料的处理,土壤有机质、全氮、碱解氮、速效磷含量年降低0.37 g/kg、0.02 g/kg、5.6 mg/kg和1.6 mg/kg。不同施氮水平条件下,土壤有机质、速效磷和速效钾含量增加,全氮和碱解氮含量下降。在等量(N 241.5 kg/hm2)施氮情况下,土壤有机质、全氮、碱解氮和速效钾含量以30%作基肥,70%在春玉米拔节中期追施的为最高。最佳的施N量为241.5 kg/hm2,较好的施肥方法为在播种时将全部氮磷钾肥料一次深施(15 cm)。In order to study the effect of nitrogen fertilizer on soil nutrient and yield of spring maize,the long-term located experiment was carried out in the brown soil of Liaoning northern Changtu County.The test re-sults show that,without applying any fertilizer treatment,soil organic matter,total nitrogen,alkali hydrolyza-ble nitrogen,available phosphorus content decreased in 0.37 g /kg,0.02 g /kg,5.6 mg /kg and 1 .6 mg /kg. Under the different nitrogen application,soil organic matter,available phosphorus and available potassium content increased,total nitrogen and available nitrogen content decreased.In the same amount （N 241 .5 kg /hm2 ）under the condition of nitrogen,soil organic matter,total nitrogen,alkali hydrolyzable nitrogen and a-vailable potassium content with 30% as base fertilizer,70% in Spring Maize Jointing Stage and topdressing was the highest.Application of 241 .5 kg per hectare of N was the best application amount,and in planting will all NPK fertilizer deep application （15 cm）.

关 键 词：春玉米 施氮 长期定位 

分 类 号：S158.3[农业科学—土壤学]