【作者】 贾长盛； 郭雄；

【Author】 Jia Changsheng Guo Xong (Agricultural Extension Services of Huzhu County,Qinghai 810500)

【机构】 青海省互助县农业技术推广中心；

【摘要】 本试验以互薯202为材料,研究了种薯不同的切块方式,种植密度, NPK 肥的施用量等因素对块茎产量和淀粉含量影响。试验结果表明,整薯播种可获得较高的产量和淀粉含量。在30000株/hm²～70000株/hm²的范围内,块茎产量没有显著差异,但淀粉含量却随种植密度的加大而降低。块茎产量和淀粉含量均随施肥量的增加而提高。互薯202的高产栽培方式为:每公顷施 N 240kg,P₂O₅ 124kg,K₂O 423kg,整薯播种,种植密度为41000株/hm²。更多还原

【Abstract】 Effects on yield and starch contents of Hushu-202 were studied by means of different seed tuber types,planting density,N,P and K fertilizers applied.The results indicated that highest yield and starch content were gained from the type of seed tubers without cutting com- pared to other 3 types.Tuber starch contents increased as the density from 30000 plants/hm~2 to 70000 plants/hm~2,but tuber yield did not show any differences.Tubers yield and starch contents increased as more fertilizers applied.The best cultural practice for Hushu-202 was application of N 249 kg/hm~2,P 124 kg/hm~2 and K 423 kg/hm~2,seed tubers without cutting and planted with 41000 plants/hm~2.更多还原