脱毒马铃薯宣薯2号最佳栽培密度研究

[目的]为了探索脱毒马铃薯宣薯2号在遵义县西北部高海拔镇乡的适宜种植密度，进一步挖掘增产潜力，提高种植效益。[方法]种植密度分别为5．257y（CK）、6．00万、6．75万、7．50万、8．25万、9．00万、9．75万株／hm^2。[结果]种植密度为9．00万株／hm^2时产量最高，达41586．30kg／hm^2，与对照相比增产38．65％；之后依次是8．25万、7．50万、9．75万、6．75万、6．00万株／hm^2，产量分别为40965．45、40163．30、36156．90、34878．60、32416．95kg／hm^2，与对照相比分剐增产36．58％、33．91％、20．55％、16．28％、8．08％。[结论]脱毒马铃薯宣薯2号在遵义县海拔1100～1250in地区种植密度以6．75万～9．00万窝／hm^2为宜，田间长势较好，增产效益明显。

Study on the Optimum Planting Density of Virus - free Potato,Xuanshu No. 2

[ Objective ] The aim was to explore the optimum planting density of virus - free potato Xuanshu No. 2 at high - altitude towns and villages of northwest in Zunyi County, to excavate its yield increasing potential further and improve its planting efficiency. [ Method ] The planting density were 5.25 × 10^4 （ CK）, 6.00 × 10^4, 6.75 × 10^4, 7.50 × 10^4, 8.25 × 10^4, 9.00 × 10^4, 9.75 × 10^4 plants/hm^2. [ Result] When the planting density was 9.00 × 10^4 plants/hm^2, the yield was the highest of 41586.30 kg/hm^2 , increased 38.65% comparing to CK; the next was 8.25 × 10^4, 7.50 × 10^4, 9.75 × 10^4, 6.75 × 10^4, 6.00 × 10^4 plants/hm^2 , resp. , their yeld was 40 965.45, 40 163.30, 36 156.90, 34 878.60, 32 416.95 kg/＇hm^2, resp. , increased 36.58%., 33.91% , 20.55% , 16.28% , 8.08% comparing to CK, resp.. [ Conclusion] The suitable planting density of virus-free potato Xuanshu No. 2 was 6.75 × 10^4 - 9.00 × 10^4 plants/hm^2 in altitude 1 100 - 1 250 m of Zunyi County, its growth vigor in field is good, and yield increasing efficiency is obvious.