氮钾肥不同用量对威芋3号马铃薯产量及经济效益的影响

摘要

为研究威芋3号马铃薯氮钾肥施用技术，在贵州省威宁县进行氮钾肥效田间试验。结果表明，不同氮钾肥用量对马铃薯的生长，产量和经济效益的影响有所不同。分析表明，马铃薯施用氮钾肥要适宜，过高反而造成产量和效益的下降。该区施用氮钾肥用量为N15kg／667m2、K2O16kg／667m2时效果较好。%A field experiment was conducted to study the efficient fertilization technology on potato cultivar Weiyu 3. The results showed that effects were different by application of different amount of nitrogen and potassium. Anal- ysis suggested that applying fertilization must be appropriate and high amount will reduce the yield and perform- ance. The recommended amount of fertilizer in Weining county was N225 kg,/ha and K2 O240 kg/ha respectively for potato cultivar Weiyu 3.