滴施不同钾肥对马铃薯生长及产量的影响

在盆栽试验条件下,通过滴灌施肥系统滴施钾肥,探讨了不同钾源对马铃薯生长、产量及品质的影响.结果表明:在本试验条件下,与不施钾肥相比,滴施不同钾肥处理均能显著促进马铃薯的生长、增加产量;滴施不同钾肥对马铃薯植株生物量的积累差异不显著;滴施氯化钾和硝酸钾处理的马铃薯块茎产量差异不显著,但低于滴施硫酸钾处理;而滴施氯化钾和硫酸钾处理的马铃薯块茎中淀粉含量差异不显著.

Effect of Different Potassium Fertilizers on Growth and Production of Potato Under Fertigation

A pot experiment was carried out to evaluate the effects of supplying different types potassium fertilizers (KCl fertilizer,K_2SO_4 fertilizer and KNO_3 fertilizer) under fertigation on the growth,tubers yield and quality of potato by using no potassium fertilizer as control.The results showed as follows:Compared with the control treatment,fertigation of different types potassium fertilizers could significantly increase the plant dry matter and tuber yield of potato.Biomasses of potato were not different among three treatments of potassium fertilizers.Tuber yield of K_2SO_4 fertilizer was the highest,and tuber yield had not significant difference between KCl and KNO_3 fertilizer.The content of starch had no significant difference between KCl fertilizer and K_2SO_4 fertilizer.