施用硫酸钾对马铃薯生物性状的影响

Influence of Potassium Sulfate Application on Potato Biological Traits

钾素对马铃薯的生长发育、结薯、薯块膨大和干物质的积累具有十分重要的作用。凉山州马铃薯主产区土壤普遍缺钾少磷,试验选用马铃薯品种凉薯97,研究在凉山州不同地区不同海拔高度施用硫酸钾对马铃薯生物性状的影响,结果表明:马铃薯施用一定量的硫酸钾能适当延长生育期、显著增产、增加薯块干物质和淀粉含量。667 m2施用硫酸钾15 kg的平均全生育期比对照增加2 d;667 m2施用硫酸钾10 kg的平均产量最高,达到1 819 kg,较对照高28.26%,差异达极显著水平;施用硫酸钾对提高干物质、淀粉含量有一定的作用,综合考虑产量、品质、效益等因素,667 m2硫酸钾施用量以5.0～10.0 kg为宜。

Potassium is important for potato growth,tuber initiation,tuber bulking and the accumulation of dry matter.However,the soil lacks potassium and phosphorus in most of the potato planting area in Liangshan Prefecture.In this research,the potato variety Liangshu 97 was chosen to study its biological traits when fertilized with potassium sulfate in different areas of different altitudes.The results showed that the growth period could be extended,the yield be significantly increased,and the volume of dry matter and starch be increased when the potato was fertilized with some potassium sulfate.When applied 15 kg potassium sulfate per 667 m2,the growth period of potato was increased by two days compared with the control.When applied 10 kg potassium sulfate per 667 m2,the yield of potato was the highest,1 819 kg（28.26% more than the control）,and the difference from the control was highly significant.The results suggest that It was appropriate to fertilize with the volume of 5.0-10.0 kg / 667 m2 considering the yield,quality and benefit.