摘要
利用盆栽试验研究了PAL肥料的氮素释放动态及对大麦经济性状和产量的影响。结果表明：PAL肥料与尿素NH4^＋-N释放没有显著差异，NO3^- —N释放趋势相同，都呈现“S”型特征曲线，且差异极显著。在大麦的整个生育期，PAL肥料氮素释放较尿素具有两个缓释阶段。第一个缓释阶段，是从施肥后到14d内；第二个缓释阶段，是施肥后的28～42d内。其缓释作用表现为：前控-后释-再控-再释，以此满足作物对不同生育期养分的需求。在施N量相同的情况下，施PAL肥料较尿素增产显著。且在试验设计的施氮量0～7kg／667m^2范围内，随着施氮量的增加，大麦产量增加；在施氮量7～14kg／667m^2范围内，随着施氮量的增加，大麦产量呈下降趋势。
A pot experiment was conducted to study the nitrogen release dynamics of a PAL fertilizer and its effects on economic characters and yield of barley. It was observed that there was no significant difference in NH4^＋ - N release between PAL fertilizer and urea treatment. The trend of NO3^- - N release was similarly ＂S＂ type curve, and there was a very significant difference. During the whole growth period of barley, there were two stages of nitrogen release from PAL fertilizer： the first stage was 0-14 d and the second stage was 28-42 d after applied. The function of nitrogen release from PAL fertilizer was satisfied with the nutrient demand of crop. Under the same nitrogen level, the yield of barley treated with PAL fertilizer was higher than that with urea. In the range of 0-7 kg/667m^2, as the nitrogen levels ascended, the yield of barley increased; in the range of 7-14 kg/667m^2, as the nitrogen levels ascended, the yield of barley descended.
出处
《干旱地区农业研究》
CSCD
北大核心
2006年第5期68-72,共5页
Agricultural Research in the Arid Areas
基金
国家科技成果重点推广项目"钠质碱化土壤新型改良剂示范推广"(2005EC000335)
