鄂马铃薯5号脱毒原原种种植密度及施肥量最佳水平组合

马铃薯脱毒种薯是目前国内外解决马铃薯品种退化、产量降低、品质下降的最有效措施。由于原原种生产成本高且数量有限,生产中需要进行原种扩繁和一、二级生产种薯繁育。为研究脱毒马铃薯原原种鄂马铃薯5号的高产栽培技术,本研究采用正交试验设计,对扩繁过程中种植密度、N、P2O5、K2O施用量进行研究。结果表明:种植密度为120 000株/hm2,纯N施用量为180 kg/hm2,P2O5施用量为90 kg/hm2,K2O施用量为330 kg/hm2是原种扩繁生产中各因素最佳水平组合。

Optimal Planting Density and Fertilizer Application for Elite Seed production from Pre-Elite of cv. Emalingshu 5

Production of potato virus-free seed potato at home and abroad is an effective measure to solve the problems of degradation,low yield,and decline in quality.Because the production of pre-elite seed is highly costive and limited in amount,elite seed needs to multiply,which,in turn,is used to produce certified seed I and II.In this research,an orthogonal experiment design was used to study the effects of plant density and the application rate of N,P2O5 and K2O on elite seed production of cv.Emalingshu 5 using pre-elite seed as panting material.The results indicated that planting at 120 000 plants/ha and application of N,P2O5 and K2O at 180,90 and 330 kg/ha,respectively,would give the highest yield.