增施钾肥对高淀粉马铃薯产量贡献的研究

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。试验表明,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作用一致。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。

A Study on the Contribution of Increased Application of Potassium Fertilizer to the Yield of High Starch Content Potato

Through two years'experiment the effect of increased application of potassium fertilizer on the physiological traits related to the yield of earliest-mature potato was studied.The result showed that increasied application of potassium fertilizer on the base of common fertilization in the local area can improve the yield,commodity rate of tuber and content of starch of potato,suggesting that potassium fertilizer contributes to quality of potato.Moreover,root activity,chlorophyll content and net assimilation rated can be increased by increased application of potassium fertilizer,revealing that potassium fertilizer contributes to related physiological traits.Related analysis of production,quality and physiological indices showed that increased application of potassium fertilizer contributes equivalently to yield and quality as well as net assimilation indices.Different treatments of increased application of potassium fertilizer have different yield increase and quality improvement raise,indicating that suitable treatments should be chosen according to production practice.