论文部分内容阅读
试验结果表明，脱毒甘薯长势较强，施肥处理每667m2日增重茎叶最高达52kg，日增块根鲜重达44kg。栽后100～130d，为块根膨大盛期，增重占全生育期的44．7％，此期为田间管理的关键时期。施肥可显著提高豫西丘陵旱地脱毒甘薯产量。其中，氮肥肥效明显优于钾肥，氮钾配合肥效优于单一施肥，平均增产35％。各处理相比，以每667m2施统N8kg、K2O6．25kg产量最高，比对照增产66.5％。
The results showed that the detoxification of sweet potato growing stronger, fertilization treatment every 667m2 increase in the fastest high-speed up to 52kg, increasing fresh weight of 44kg. 100 ~ 130d after transplanting, swelling of tuberous root, weight gain accounting for 44.7% of the whole growth period, this period is the critical period of field management. Fertilization can significantly increase the drought-free sweet potato yield in the hilly areas of western Henan. Among them, the efficiency of nitrogen fertilizer was obviously better than that of potassium fertilizer. The efficiency of nitrogen and potassium fertilizer was better than that of single fertilization, with an average increase of 35%. Compared with other treatments, the yield of N8kg and K2O6.25kg per 667m2 was the highest, 66.5% higher than that of the control.