脱毒马铃薯生育规律的研究

本文通过对脱毒马铃薯生育规律的研究,指出:一、早熟种脱毒与否,其物候期差异不明显;中熟种脱毒薯的出苗、现蕾、开花及成熟期均晚于未脱毒薯。二、早熟种脱毒与否,株高差异不大;中熟种脱毒薯植株高于未脱毒薯。早、中熟脱毒薯茎叶鲜重及块茎鲜重均显著增加。三、早熟种脱毒薯,后期生长显著旺于未脱毒薯。中熟种脱毒薯茎叶生长高峰晚于未脱毒薯,其生长显著优于未脱薯毒。四、早熟种脱毒薯的平衡期早于未脱毒薯。因此,可以早期供应市场;中熟种脱毒薯平衡期延长,适当晚收,可以高产增收。

STUDY ON THE PERFORMANCE OF VIRUS-FREE POTATOES

The growth and development of virus-free potatoes was studied in this paper.The result suggested: 1.Whether the early maturing cultivars were virus-free or not,there was little difference in its phenological period,but the date of emerging,squar- ing,flowering and maturing of middle maturing virus-free cultivars was later than that of the cultivars infected. 2.Whether early maturing potato cultivars were virus-free or not,there was little difference in the plant height,but the plant height of middle maturing virus-free cultivars was higher than that of the cultivars infected.The fresh weight of stem,leaf and tuber of both early and middle maturing virus-free cultivars increased significantly. 3.The early maturing virus-free cultivars were more vigorous than the cul- tivars infected during the late growth period.The growth peak of middle ma- turing virus-free cultivars was later than that of the cultivars infected,and the virus-free cultivars grew better than the cultivars infected. 4.The equilibrium stage of early maturing virus-free cultivars was earlier than that of the cultivars infected;therefore they can be supplied for the market early.The equilibrium stage of middle maturing virus-free cultivars was later,so higher yield could be achieved if they were harvested late.