Potato is rich in nutrition, and can be vital in improving and enriching the diets of people. However, potatoes contain a natural secondary metabolite group, steroidal glycoalkaloids (SGAs), which can cause human and animal toxicity at higher levels. In this study, we investigated the inhibition effect of film on SGA concentration in tuber during potato growth via a pot experiment in 2016 and a field experiment in 2017. Tubers were sampled every 15 days from flowering to harvest in the pot experiment, and were sampled after harvest in field experiment. The results showed that SGA concentration decreased gradually with the enlargement and maturation of potato tubers. In contrast to blank and white film treatments, the inhibition effect of black film on SGA concentration in tuber was remarkable, while the tuber yield per plant was similar between treatments. In the field experiment, the tuber SGA concentration mulching black film was significantly lower than that mulching white film and blank treatments, while the tuber yield per plant mulching black film among them was comparable. These results suggest that black film may be applied to the production to inhibit SGA concentration accumulation during growth, which is important for consuming potato tubers safely.

马铃薯营养丰富，对改善和丰富人们的饮食至关重要。但是，土豆中含有天然的次生代谢物基团，甾体类生物碱（SGA），可导致较高水平的人畜毒性。在这项研究中，我们通过2016年的盆栽试验和2017年的田间试验研究了膜对马铃薯生长过程中块茎中SGA浓度的抑制作用。在盆栽实验中，从开花到收获的每15天取样一次，然后取样在田间试验后收获。结果表明，随着马铃薯块茎的增大和成熟，SGA的浓度逐渐降低。与空白膜和白色膜处理相比，黑色膜对块茎中SGA浓度的抑制作用显着，处理之间的单株块茎产量相似。在田间试验中，块茎SGA浓度覆盖黑膜明显低于覆盖白膜和空白处理，而其中每株覆盖黑膜的块茎产量相当。这些结果表明，黑膜可用于生产，以抑制生长过程中SGA浓度的积累，这对于安全食用马铃薯块茎很重要。