不同氮水平对马铃薯干物质积累和产量的影响

摘要

采用田间试验的方法,研究了不同氮肥水平对马铃薯干物质积累和产量的影响。试验结果表明：马铃薯收获时,各施氮处理块茎干物质积累量比不施氮处理增加42.80%～91.59%,且施氮120 kg.hm-2处理最高;在磷钾肥的基础上施用氮肥增加了马铃薯的产量,增产幅度为22.30%～61.48%;施氮120 kg.hm-2处理产量增加幅度最大,且产量极显著地高于施氮60 kg.hm-2和不施氮处理。%The effect of nitrogen levels on dry matter accumulation and yield of potato was studied in field experiments.The results showed that,with the increase of nitrogen amount,the whole plant dry matter accumulation also increased gradually.Compared with NO,potato tuber dry matter accumulation was increased from 42.80% to 91.59% by nitrogen treatments at harvest,and nitrogen 120 kg·hm-2 treatment was the highest.Nitrogen fertilizer application increased the yield of potato on the basis of phosphorus and potassium fertilizer,and yield was increased from 22.30% to 61.48%.Nitrogen 120 kg·hm-2 treatment has the largest increase in yield,and the yield was significantly higher than 0 and 60 kg·hm-2 treatments.