马铃薯脱毒微型薯无土栽培条件下生产的原原种种薯,因试管苗扦插生长季节长短差异,收获的微型薯粒大小有较大差别,大的粒重可在2g以上,小的仅0.3g或以下,它们虽都具极强的发芽能力,发芽率一般在99%以上,但顶芽的粗壮程度、顶土能力差别较大,原种繁殖时必须注意播深.田间出苗率固然与播种时土壤墒情、土壤粘重度诸因素有关,薯粒大小、播深对其影响亦尤为重要.为了摸索不同大小薯粒齐苗要求的适宜播深,我们特进行该试验.现将结果报告如下.1 试验设计与方法 Potato virus-free microtuber soilless culture conditions of the original seed production of potato, the test tube plantlets due to the difference in the season of cutting growth, the size of the harvested mini potato are quite different, large grain weight can be more than 2g, only 0.3 small g or less, although they have a very strong ability to germinate, the germination rate is generally above 99%, but the top buds coarse degree, top soil capacity differences, the original breeding must pay attention to sowing. Sowing soil moisture, soil viscosity and other factors related to the size of sowing, sowing depth of its impact is also very important.In order to explore the different sizes of sowing Qi suitable for sowing depth, we carry out the test. The results are reported as follows .1 Experimental Design and Methods