马铃薯追施硝酸钾增产效果的研究

Effect of Topdressing Potassium Nitrate on Potato Yield

研究了马铃薯追施硝酸钾对块茎产量及相关性状的影响。结果表明:追施钾肥能明显提高马铃薯产量、块茎淀粉含量及生育后期叶片叶绿素含量和光合强度;不同时期追施硝酸钾的效果不同,以现蕾初期追施效果最佳。

The experiment in the effect of topdressing potassium nitrate on the potato yield was carried out for two years, The results showed that topdressing potassium nitrate increased the yield and the farina content of stem tubers and also increased the content of blade and chlorophyll during the last period when grevAng up, Besides, the photosynthesis intensity was increased as well. Different effects on potato yield depended on different periads of topdressing potassium nitrate and topdressing potassium nitrate corld produce the best effect in buds producing.