增施钾肥对马铃薯产量及相关生理指标的贡献作用

通过2年试验研究增施钾肥对马铃薯产量及相关性状的影响，结果表明，在当地习惯施肥基础上增施钾肥，提高了马铃薯产量、块茎淀粉含量和商品率，钾肥对马铃薯产量与品质的贡献作用显著；同时，增施钾肥提高了块茎膨大后期的净同化率、叶绿素含量和根系活力，钾肥对马铃薯净同化率等生理指标的贡献作用显著。对产量、品质指标、生理指标进行相关分析表明，增施钾肥对产量品质指标和净同化率等生理指标的贡献一致。增施钾肥不同处理增产提质效果不同．应根据生产实际选择适宜处理。

Effect on the Potato Production and Related Physiological Traits by Increasing of Potassium Fertilizer

The result of the research on the potato production and related physiological traits,which was carried out for two years, showed that increasing of potassium fertilizer on the base of common applying fertilizer at local area can improve production of potato, commodity rate of tuber and content of starch.Moreover,root activity,chlorophyll content and net assimilation rated can be also in- creased.Related analysis of production,quality and physiological traits indicated that increasing of potassium fertilizer...