增施钾肥对早熟马铃薯产量的贡献

通过两年试验研究了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、叶绿素含量和叶面积系数,钾肥对马铃薯净同化率等生理指标的贡献作用显著.对生理指标与产量、品质指标的相关分析表明,增施钾肥对产量、品质和净同化率等指标的贡献作用一致.但不同处理的增效作用有一定差异,应根据生产实际选择适宜处理.

Contribution of Increasing Potassium Fertilizer to the yield of Early-mature Potato

In this report,the effect of increasing potassium fertilizer on the production and related physiological traits of early-mature potato was studied for two 2 years. The result showed that increasing polassium fertilizer on the base of common application at local area can improve production of potato, commodity rate of tuber and content of starch, suggesting that potassium fertilizer contributed to quality of potato. Moreover, leaf area index,chlorophyll content and net assimilation rate can be increased by increasing of potassium fertilizer, revealing that potassium fertilizer contributed to related physiological traits. The different treatments of increasing potassium fertilize have different production increase and quality improvenent.