马铃薯种薯生产密度试验研究

An Experimental Study of Planting Density of Seed Potato

以冀张薯8号和陇薯3号为试验品种,进行了不同种植密度比较试验。结果表明:随着种植密度增加,冀张薯8号和陇薯3号单株结薯个数、大薯率、薯重、商品率呈下降趋势,但单位面积整薯数量随着密度增加而增加。高密度下单位面积小薯个数增加明显,有利于增加整块薯种数量以满足生产需要小整薯种。试验种植密度条件下,总产量随着密度加大而呈递增。冀张薯8号和陇薯3号最佳繁种种植密度为7.2万株/hm2,理论最高产量为2 1750 kg/hm2、31 473 kg/hm2。

A comparative test was conducted on different planting densities with Longshu No.3 and Jizhangshu No. 8 as the test varieties. The results showed that the per node tuber number, the large and medium tuber number per plant, the yield and commodity rate of Longshu No.3 and Jizhangshu No. 8 decreased with the increase of planting density, but the whole tuber number per unit area increased with the increase of planting density. The small tuber number per unit area under the high planting density increased significantly, it was beneficial for increasing the whole tuber quantity to meet the production requirements. Under the trial planting density condition, the total output increased with the increase of planting density. The optimum planting density of Jizhangshu No.8 and Longshu No.3 was 72 000 plants/hm^2, and the theoretical maximum yields were 2 1750 kg/hm^2 and 31 473 kg/hm^2 respectively.